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Solar activity report
Report of Solar-Geophysical Activity 2024 Apr 09 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 100 Issued at 2200Z on 09 Apr 2024IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C1 event observed at
09/0353Z. There are currently 5 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 and a slight chance for an M-class
flare on day one (10 Apr) and expected to be low with a chance for
M-class flares on days two and three (11 Apr, 12 Apr).
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 486 km/s at 09/1919Z. Total IMF reached 8
nT at 09/0520Z. The maximum southward component of Bz reached -7 nT at
09/0520Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 438 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (10 Apr), quiet to unsettled
levels on day two (11 Apr) and quiet levels on day three (12 Apr).
III. Event Probabilities 10 Apr to 12 Apr
| Class M | 10% | 25% | 25% |
| Class X | 01% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 09 Apr 124 Predicted 10 Apr-12 Apr 122/140/145 90 Day Mean 09 Apr 160
V. Geomagnetic A Indices
Observed Afr/Ap 08 Apr 008/008 Estimated Afr/Ap 09 Apr 010/012 Predicted Afr/Ap 10 Apr-12 Apr 010/012-007/008-006/005
VI. Geomagnetic Activity Probabilities 10 Apr to 12 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 20% | 10% |
| Minor storm | 10% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 30% | 20% |
| Major-severe storm | 40% | 25% | 15% |
All times in UTC
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Space weather facts
| Last X-flare | 2024/11/06 | X2.39 |
| Last M-flare | 2024/11/20 | M1.1 |
| Last geomagnetic storm | 2024/11/10 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| October 2024 | 166.4 +25 |
| November 2024 | 142.7 -23.8 |
| Last 30 days | 155.2 +4.4 |