Solar activity report
Below you'll find a daily report brought to you by the NOAA about the solar activity and auroral activity during the past day and the prediction for the coming days. This page is daily updated around midnight.
Report of Solar-Geophysical Activity 2018 Apr 22 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 112 Issued at 2200Z on 22 Apr 2018IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z
Solar activity has been at very low levels for the past 24
hours. There are currently 1 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a chance for a C-class flares on days one, two, and three (23 Apr,
24 Apr, 25 Apr).
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 584 km/s at 21/2348Z. Total IMF reached 5 nT at
22/1129Z. The maximum southward component of Bz reached -3 nT at
22/1214Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 24055 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (23 Apr, 24 Apr, 25
Apr).
III. Event Probabilities 23 Apr to 25 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 22 Apr 076 Predicted 23 Apr-25 Apr 075/075/075 90 Day Mean 22 Apr 070
V. Geomagnetic A Indices
Observed Afr/Ap 21 Apr 010/010 Estimated Afr/Ap 22 Apr 005/005 Predicted Afr/Ap 23 Apr-25 Apr 005/005-006/005-006/005
VI. Geomagnetic Activity Probabilities 23 Apr to 25 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 10% | 10% | 10% |
Current data suggest that it is not possible to see aurora now at middle latitudes
Latest news
Friday, 20 April 2018 - 13:04 UTC
Moderate G2 geomagnetic storm
Tuesday, 17 April 2018 - 13:57 UTC
Coronal hole faces Earth
Friday, 6 April 2018 - 19:07 UTC
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Space weather facts
| Last X-flare: | 2017/09/10 | X8.2 |
| Last M-flare: | 2017/10/20 | M1.0 |
| Last geomagnetic storm: | 2018/04/20 | Kp6 (G2) |
| Number of spotless days in 2018: | 65 | |
| Last spotless day: | 2018/04/18 | |