Viewing archive of Wednesday, 15 May 2024
Solar activity report
Report of Solar-Geophysical Activity 2024 May 15 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 136 Issued at 2200Z on 15 May 2024IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z Solar activity has been at high levels for the past 24 hours.
The largest solar event of the period was a X2 event observed at
15/1438Z. There are currently 12 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 day one (16 May) and expected to be
low with a chance for M-class flares and a slight chance for an X-class
flare on days two and three (17 May, 18 May).
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 595 km/s at 15/0012Z. Total IMF reached 13
nT at 15/1029Z. The maximum southward component of Bz reached -5 nT at
15/1920Z. Protons greater than 10 MeV at geosynchronous orbit reached a
peak level of 31 pfu at 15/0530Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 1496 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and two (16 May, 17 May) and
quiet levels on day three (18 May). Protons are expected to cross
threshold on day one (16 May), have a slight chance of crossing
threshold on day two (17 May) and have a slight chance of crossing
threshold on day three (18 May).
III. Event Probabilities 16 May to 18 May
| Class M | 75% | 40% | 40% |
| Class X | 40% | 10% | 10% |
| Proton | 99% | 15% | 10% |
| PCAF | yellow | ||
IV. Penticton 10.7 cm Flux
Observed 15 May 216 Predicted 16 May-18 May 200/190/180 90 Day Mean 15 May 166
V. Geomagnetic A Indices
Observed Afr/Ap 14 May 008/007 Estimated Afr/Ap 15 May 010/013 Predicted Afr/Ap 16 May-18 May 010/012-010/012-007/008
VI. Geomagnetic Activity Probabilities 16 May to 18 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 20% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 30% | 25% |
| Major-severe storm | 45% | 45% | 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 |