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Solar activity report
Report of Solar-Geophysical Activity 2024 Mar 27 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 87 Issued at 2200Z on 27 Mar 2024IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M1 event observed at
26/2158Z. There are currently 6 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be moderate
with a chance for X-class flares on days one and two (28 Mar, 29 Mar)
and expected to be low with a chance for M-class flares and a slight
chance for an X-class flare on day three (30 Mar).
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 528 km/s at 27/0957Z. Total IMF reached 7
nT at 27/0814Z. The maximum southward component of Bz reached -3 nT at
27/0623Z. Protons greater than 10 MeV at geosynchronous orbit reached a
peak level of 2 pfu at 27/0015Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 242 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (28 Mar) and quiet to unsettled levels
on days two and three (29 Mar, 30 Mar). Protons have a chance of
crossing threshold on days one and two (28 Mar, 29 Mar) and have a
slight chance of crossing threshold on day three (30 Mar).
III. Event Probabilities 28 Mar to 30 Mar
| Class M | 75% | 75% | 40% |
| Class X | 25% | 25% | 10% |
| Proton | 30% | 30% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Mar 175 Predicted 28 Mar-30 Mar 180/175/170 90 Day Mean 27 Mar 164
V. Geomagnetic A Indices
Observed Afr/Ap 26 Mar 011/009 Estimated Afr/Ap 27 Mar 008/008 Predicted Afr/Ap 28 Mar-30 Mar 005/005-007/010-007/008
VI. Geomagnetic Activity Probabilities 28 Mar to 30 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 15% |
| Minor storm | 01% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 30% | 25% |
| Major-severe storm | 20% | 30% | 25% |
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 |