NOAA SWPC Alerts, Watches and Warnings

The National Oceanic and Atmospheric Administration Space Weather Prediction Center (NOAA SWPC) is the official space weather government agency from the United States that provides alerts, watches and warning for space weather disturbances. Below you will find the latest space weather alerts, watches and warnings issued by the NOAA SWPC.

Monday, 20 February 2017

19:15 UTC

Space Weather Message Code: WARK04
Serial Number: 3140
Issue Time: 2017 Feb 20 1915 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Feb 20 1914 UTC
Valid To: 2017 Feb 20 2359 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:16 UTC

Space Weather Message Code: WARK04
Serial Number: 3139
Issue Time: 2017 Feb 20 0516 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Feb 20 0515 UTC
Valid To: 2017 Feb 20 1200 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Sunday, 19 February 2017

08:57 UTC

Space Weather Message Code: WARK04
Serial Number: 3138
Issue Time: 2017 Feb 19 0857 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3137
Valid From: 2017 Feb 19 0000 UTC
Now Valid Until: 2017 Feb 19 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

00:05 UTC

Space Weather Message Code: WARK04
Serial Number: 3137
Issue Time: 2017 Feb 19 0005 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Feb 19 0000 UTC
Valid To: 2017 Feb 19 0900 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Saturday, 18 February 2017

03:59 UTC

Space Weather Message Code: WARK05
Serial Number: 1308
Issue Time: 2017 Feb 18 0359 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Feb 18 0357 UTC
Valid To: 2017 Feb 18 0900 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

03:59 UTC

Space Weather Message Code: WARK04
Serial Number: 3136
Issue Time: 2017 Feb 18 0359 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3135
Valid From: 2017 Feb 17 1749 UTC
Now Valid Until: 2017 Feb 18 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Friday, 17 February 2017

23:12 UTC

Space Weather Message Code: WARK04
Serial Number: 3135
Issue Time: 2017 Feb 17 2312 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3134
Valid From: 2017 Feb 17 1749 UTC
Now Valid Until: 2017 Feb 18 0700 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

18:03 UTC

Space Weather Message Code: ALTK04
Serial Number: 1954
Issue Time: 2017 Feb 17 1803 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Feb 17 1759 UTC
Synoptic Period: 1500-1800 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

17:50 UTC

Space Weather Message Code: WARK04
Serial Number: 3134
Issue Time: 2017 Feb 17 1750 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Feb 17 1749 UTC
Valid To: 2017 Feb 17 2359 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

08:52 UTC

Space Weather Message Code: WARK05
Serial Number: 1307
Issue Time: 2017 Feb 17 0852 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Feb 17 0852 UTC
Valid To: 2017 Feb 17 1200 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

04:46 UTC

Space Weather Message Code: ALTK04
Serial Number: 1953
Issue Time: 2017 Feb 17 0446 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Feb 17 0446 UTC
Synoptic Period: 0300-0600 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

04:37 UTC

Space Weather Message Code: WARK04
Serial Number: 3133
Issue Time: 2017 Feb 17 0437 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Feb 17 0436 UTC
Valid To: 2017 Feb 17 1500 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Thursday, 16 February 2017

17:30 UTC

Space Weather Message Code: WARK04
Serial Number: 3132
Issue Time: 2017 Feb 16 1730 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Feb 16 1730 UTC
Valid To: 2017 Feb 16 2359 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Tuesday, 14 February 2017

13:05 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2548
Issue Time: 2017 Feb 14 1305 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2547
Begin Time: 2017 Feb 01 1240 UTC
Yesterday Maximum 2MeV Flux: 4519 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Monday, 13 February 2017

10:25 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2547
Issue Time: 2017 Feb 13 1025 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2546
Begin Time: 2017 Feb 01 1240 UTC
Yesterday Maximum 2MeV Flux: 4591 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

06:03 UTC

Space Weather Message Code: SUM10R
Serial Number: 688
Issue Time: 2017 Feb 13 0603 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2017 Feb 13 0445 UTC
Maximum Time: 2017 Feb 13 0445 UTC
End Time: 2017 Feb 13 0445 UTC
Duration: 1 minutes
Peak Flux: 100 sfu
Latest Penticton Noon Flux: 76 sfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

Sunday, 12 February 2017

09:41 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2546
Issue Time: 2017 Feb 12 0941 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2545
Begin Time: 2017 Feb 01 1240 UTC
Yesterday Maximum 2MeV Flux: 2344 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Saturday, 11 February 2017

10:20 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2545
Issue Time: 2017 Feb 11 1020 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2544
Begin Time: 2017 Feb 01 1240 UTC
Yesterday Maximum 2MeV Flux: 10414 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Friday, 10 February 2017

08:21 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2544
Issue Time: 2017 Feb 10 0821 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2543
Begin Time: 2017 Feb 01 1240 UTC
Yesterday Maximum 2MeV Flux: 13675 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Thursday, 9 February 2017

05:55 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2543
Issue Time: 2017 Feb 09 0555 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2542
Begin Time: 2017 Feb 01 1240 UTC
Yesterday Maximum 2MeV Flux: 18550 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Wednesday, 8 February 2017

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2542
Issue Time: 2017 Feb 08 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2541
Begin Time: 2017 Feb 01 1240 UTC
Yesterday Maximum 2MeV Flux: 14194 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Tuesday, 7 February 2017

05:01 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2541
Issue Time: 2017 Feb 07 0501 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2540
Begin Time: 2017 Feb 01 1240 UTC
Yesterday Maximum 2MeV Flux: 16600 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Monday, 6 February 2017

23:06 UTC

Space Weather Message Code: ALTK04
Serial Number: 1952
Issue Time: 2017 Feb 06 2306 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Feb 06 2306 UTC
Synoptic Period: 2100-2400 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

22:51 UTC

Space Weather Message Code: WARK04
Serial Number: 3131
Issue Time: 2017 Feb 06 2251 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Feb 06 2252 UTC
Valid To: 2017 Feb 07 0600 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:01 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2540
Issue Time: 2017 Feb 06 0501 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2539
Begin Time: 2017 Feb 01 1240 UTC
Yesterday Maximum 2MeV Flux: 20566 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Sunday, 5 February 2017

19:50 UTC

Space Weather Message Code: WARK04
Serial Number: 3130
Issue Time: 2017 Feb 05 1950 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Feb 05 1949 UTC
Valid To: 2017 Feb 05 2359 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:01 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2539
Issue Time: 2017 Feb 05 0501 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2538
Begin Time: 2017 Feb 01 1240 UTC
Yesterday Maximum 2MeV Flux: 22414 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

04:38 UTC

Space Weather Message Code: ALTK04
Serial Number: 1951
Issue Time: 2017 Feb 05 0438 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Feb 05 0438 UTC
Synoptic Period: 0300-0600 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

04:36 UTC

Space Weather Message Code: WARK04
Serial Number: 3129
Issue Time: 2017 Feb 05 0436 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Feb 05 0435 UTC
Valid To: 2017 Feb 05 1200 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Saturday, 4 February 2017

05:35 UTC

Space Weather Message Code: WARK04
Serial Number: 3128
Issue Time: 2017 Feb 04 0535 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Feb 04 0535 UTC
Valid To: 2017 Feb 04 1200 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:08 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2538
Issue Time: 2017 Feb 04 0508 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2537
Begin Time: 2017 Feb 01 1240 UTC
Yesterday Maximum 2MeV Flux: 20372 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Friday, 3 February 2017

07:41 UTC

Space Weather Message Code: WARK05
Serial Number: 1306
Issue Time: 2017 Feb 03 0741 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Feb 03 0741 UTC
Valid To: 2017 Feb 03 1200 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:01 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2537
Issue Time: 2017 Feb 03 0501 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2536
Begin Time: 2017 Feb 01 1240 UTC
Yesterday Maximum 2MeV Flux: 17976 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

02:30 UTC

Space Weather Message Code: WARK04
Serial Number: 3127
Issue Time: 2017 Feb 03 0230 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3126
Valid From: 2017 Jan 31 0755 UTC
Now Valid Until: 2017 Feb 03 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Thursday, 2 February 2017

22:36 UTC

Space Weather Message Code: WARK05
Serial Number: 1305
Issue Time: 2017 Feb 02 2236 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Feb 02 2236 UTC
Valid To: 2017 Feb 03 0300 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:53 UTC

Space Weather Message Code: WARK04
Serial Number: 3126
Issue Time: 2017 Feb 02 1753 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3125
Valid From: 2017 Jan 31 0755 UTC
Now Valid Until: 2017 Feb 03 0300 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:40 UTC

Space Weather Message Code: WARK04
Serial Number: 3125
Issue Time: 2017 Feb 02 0540 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3124
Valid From: 2017 Jan 31 0755 UTC
Now Valid Until: 2017 Feb 02 1800 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2536
Issue Time: 2017 Feb 02 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2535
Begin Time: 2017 Feb 01 1240 UTC
Yesterday Maximum 2MeV Flux: 15275 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Wednesday, 1 February 2017

23:38 UTC

Space Weather Message Code: WARK05
Serial Number: 1304
Issue Time: 2017 Feb 01 2338 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1303
Valid From: 2017 Feb 01 1528 UTC
Now Valid Until: 2017 Feb 02 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

22:06 UTC

Space Weather Message Code: ALTK05
Serial Number: 1061
Issue Time: 2017 Feb 01 2206 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Feb 01 2206 UTC
Synoptic Period: 2100-2400 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

22:05 UTC

Space Weather Message Code: WATA20
Serial Number: 768
Issue Time: 2017 Feb 01 2205 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Feb 02:  G1 (Minor)   Feb 03:  None (Below G1)   Feb 04:  None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

16:10 UTC

Space Weather Message Code: ALTK05
Serial Number: 1060
Issue Time: 2017 Feb 01 1610 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Feb 01 1610 UTC
Synoptic Period: 1500-1800 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

15:29 UTC

Space Weather Message Code: WARK04
Serial Number: 3124
Issue Time: 2017 Feb 01 1529 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3123
Valid From: 2017 Jan 31 0755 UTC
Now Valid Until: 2017 Feb 02 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

15:29 UTC

Space Weather Message Code: WARK05
Serial Number: 1303
Issue Time: 2017 Feb 01 1529 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Feb 01 1528 UTC
Valid To: 2017 Feb 01 2359 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

12:46 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2535
Issue Time: 2017 Feb 01 1246 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2017 Feb 01 1240 UTC
Station: GOES13
 

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

05:21 UTC

Space Weather Message Code: WARK04
Serial Number: 3123
Issue Time: 2017 Feb 01 0521 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3122
Valid From: 2017 Jan 31 0755 UTC
Now Valid Until: 2017 Feb 01 1800 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

03:03 UTC

Space Weather Message Code: ALTK05
Serial Number: 1059
Issue Time: 2017 Feb 01 0303 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Feb 01 0259 UTC
Synoptic Period: 0000-0300 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

00:02 UTC

Space Weather Message Code: ALTK05
Serial Number: 1058
Issue Time: 2017 Feb 01 0001 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Jan 31 2359 UTC
Synoptic Period: 2100-2400 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Tuesday, 31 January 2017

23:40 UTC

Space Weather Message Code: WARK05
Serial Number: 1302
Issue Time: 2017 Jan 31 2340 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1301
Valid From: 2017 Jan 31 1455 UTC
Now Valid Until: 2017 Feb 01 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:55 UTC

Space Weather Message Code: WARK04
Serial Number: 3122
Issue Time: 2017 Jan 31 1455 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3121
Valid From: 2017 Jan 31 0755 UTC
Now Valid Until: 2017 Feb 01 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

14:55 UTC

Space Weather Message Code: WARK05
Serial Number: 1301
Issue Time: 2017 Jan 31 1455 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Jan 31 1455 UTC
Valid To: 2017 Jan 31 2359 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

10:01 UTC

Space Weather Message Code: ALTK04
Serial Number: 1950
Issue Time: 2017 Jan 31 1001 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Jan 31 1000 UTC
Synoptic Period: 0900-1200 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

07:55 UTC

Space Weather Message Code: WARK04
Serial Number: 3121
Issue Time: 2017 Jan 31 0755 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Jan 31 0755 UTC
Valid To: 2017 Jan 31 1800 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Monday, 30 January 2017

12:37 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2534
Issue Time: 2017 Jan 30 1237 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2533
Begin Time: 2017 Jan 26 1350 UTC
Yesterday Maximum 2MeV Flux: 2377 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Sunday, 29 January 2017

14:20 UTC

Space Weather Message Code: WATA20
Serial Number: 767
Issue Time: 2017 Jan 29 1420 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Jan 30:  None (Below G1)   Jan 31:  G1 (Minor)   Feb 01:  G1 (Minor)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Comment: G1 conditions are anticipated due to effects from a negative polarity coronal hole.

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

12:21 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2533
Issue Time: 2017 Jan 29 1221 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2532
Begin Time: 2017 Jan 26 1350 UTC
Yesterday Maximum 2MeV Flux: 2496 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Saturday, 28 January 2017

18:30 UTC

Space Weather Message Code: WATA20
Serial Number: 766
Issue Time: 2017 Jan 28 1830 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Jan 29:  None (Below G1)   Jan 30:  None (Below G1)   Jan 31:  G1 (Minor)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

11:35 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2532
Issue Time: 2017 Jan 28 1135 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2531
Begin Time: 2017 Jan 26 1350 UTC
Yesterday Maximum 2MeV Flux: 1551 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Friday, 27 January 2017

20:57 UTC

Space Weather Message Code: WARK04
Serial Number: 3120
Issue Time: 2017 Jan 27 2057 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3119
Valid From: 2017 Jan 26 1350 UTC
Now Valid Until: 2017 Jan 28 0300 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

16:05 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2531
Issue Time: 2017 Jan 27 1605 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2530
Begin Time: 2017 Jan 26 1350 UTC
Yesterday Maximum 2MeV Flux: 1282 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

05:39 UTC

Space Weather Message Code: WARK04
Serial Number: 3119
Issue Time: 2017 Jan 27 0539 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3118
Valid From: 2017 Jan 26 1350 UTC
Now Valid Until: 2017 Jan 27 2100 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:39 UTC

Space Weather Message Code: WARK05
Serial Number: 1300
Issue Time: 2017 Jan 27 0539 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1299
Valid From: 2017 Jan 27 0136 UTC
Now Valid Until: 2017 Jan 27 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

01:36 UTC

Space Weather Message Code: WARK05
Serial Number: 1299
Issue Time: 2017 Jan 27 0136 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Jan 27 0136 UTC
Valid To: 2017 Jan 27 0600 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Thursday, 26 January 2017

23:42 UTC

Space Weather Message Code: WARK04
Serial Number: 3118
Issue Time: 2017 Jan 26 2342 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3117
Valid From: 2017 Jan 26 1350 UTC
Now Valid Until: 2017 Jan 27 1300 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

18:05 UTC

Space Weather Message Code: ALTK04
Serial Number: 1949
Issue Time: 2017 Jan 26 1805 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Jan 26 1759 UTC
Synoptic Period: 1500-1800 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

13:54 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2530
Issue Time: 2017 Jan 26 1354 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2017 Jan 26 1350 UTC
Station: GOES13
 

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

13:50 UTC

Space Weather Message Code: WARK04
Serial Number: 3117
Issue Time: 2017 Jan 26 1350 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Jan 26 1350 UTC
Valid To: 2017 Jan 26 2359 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Tuesday, 24 January 2017

17:16 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2529
Issue Time: 2017 Jan 24 1716 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2528
Begin Time: 2017 Jan 20 1340 UTC
Yesterday Maximum 2MeV Flux: 1184 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Monday, 23 January 2017

14:31 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2528
Issue Time: 2017 Jan 23 1431 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2527
Begin Time: 2017 Jan 20 1340 UTC
Yesterday Maximum 2MeV Flux: 1154 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Sunday, 22 January 2017

14:56 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2527
Issue Time: 2017 Jan 22 1456 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2526
Begin Time: 2017 Jan 20 1340 UTC
Yesterday Maximum 2MeV Flux: 2840 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Saturday, 21 January 2017

22:45 UTC

Space Weather Message Code: ALTK04
Serial Number: 1948
Issue Time: 2017 Jan 21 2245 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Jan 21 2245 UTC
Synoptic Period: 2100-2400 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

22:43 UTC

Space Weather Message Code: WARK04
Serial Number: 3116
Issue Time: 2017 Jan 21 2243 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Jan 21 2242 UTC
Valid To: 2017 Jan 22 0600 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Current data suggest that it is not possible to see aurora now at middle latitudes

Latest news

Today's space weather

Auroral activity Minor Severe
High latitude 20% 20%
Middle latitude 5% 1%
Predicted Kp max 2
Solar activity
M-class solar flare 1%
X-class solar flare 1%
B4.5 B3.7 B5.4

Support SpaceWeatherLive.com!

A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!

14%

Get instant alerts!

Space weather facts

Last X-flare:2015/05/05X2.7
Last M-flare:2016/11/29M1.2
Last geomagnetic storm:2017/02/01Kp5 (G1)
Number of spotless days in 2017:11
Last spotless day:2017/02/08

This day in history*

Solar flares
12002M5.1
22002M4.3
32002M4.2
42002M3.5
52014M3.0
ApG
1201437G2
2201220G1
3200619G1
4200317
5199417G1
*since 1994