Viewing archive of Wednesday, 25 October 2017

Solar activity report

Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2017 Oct 25 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 298 Issued at 2200Z on 25 Oct 2017

IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z

Solar activity has been at very low levels for the past 24 hours. There are currently 2 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low with a slight chance for a C-class flare on days one, two, and three (26 Oct, 27 Oct, 28 Oct).
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field has been at quiet to minor storm levels for the past 24 hours. Solar wind speed reached a peak of 676 km/s at 25/1945Z. Total IMF reached 10 nT at 25/0157Z. The maximum southward component of Bz reached -8 nT at 25/0206Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 1178 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to minor storm levels on day one (26 Oct) and quiet to active levels on days two and three (27 Oct, 28 Oct).
III. Event Probabilities 26 Oct to 28 Oct
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       25 Oct 079
  Predicted   26 Oct-28 Oct 079/078/077
  90 Day Mean        25 Oct 082

V. Geomagnetic A Indices
  Observed Afr/Ap 24 Oct  013/014
  Estimated     Afr/Ap 25 Oct  022/028
  Predicted    Afr/Ap 26 Oct-28 Oct  019/024-013/016-010/012

VI. Geomagnetic Activity Probabilities 26 Oct to 28 Oct
A. Middle Latitudes
Active40%30%25%
Minor storm25%15%10%
Major-severe storm05%05%01%
B. High Latitudes
Active15%15%20%
Minor storm30%25%20%
Major-severe storm45%35%20%

All times in UTC

<< Go to daily overview page

Latest news

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!

63%
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/05/15X2.9
Last M-flare2024/05/23M1.7
Last geomagnetic storm2024/05/17Kp6 (G2)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
April 2024136.5 +31.6
May 2024153.8 +17.3
Last 30 days152.9 +22.5

This day in history*

Solar flares
12024M4.1
22023M3.0
32024M1.7
42000M1.36
52021M1.2
ApG
1200278G4
2198947G3
3200029G3
4195628G3
5195127G2
*since 1994

Social networks