Viewing archive of Saturday, 13 May 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 May 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 133 Issued at 2200Z on 13 May 2023IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C9 event observed at
13/0045Z from Region 3296 (N15W89). There are currently 8 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares and a slight chance for an X-class flare on
days one, two, and three (14 May, 15 May, 16 May).
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 574 km/s at 12/2201Z. Total IMF reached 15
nT at 13/1953Z. The maximum southward component of Bz reached -14 nT at
13/1950Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 361 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (14 May), quiet levels on
day two (15 May) and unsettled to active levels on day three (16 May).
Protons greater than 10 Mev have a slight chance of crossing threshold
on day one (14 May).
III. Event Probabilities 14 May to 16 May
| Class M | 35% | 35% | 35% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 05% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 13 May 144 Predicted 14 May-16 May 145/140/135 90 Day Mean 13 May 157
V. Geomagnetic A Indices
Observed Afr/Ap 12 May 015/017 Estimated Afr/Ap 13 May 009/011 Predicted Afr/Ap 14 May-16 May 008/008-005/005-011/014
VI. Geomagnetic Activity Probabilities 14 May to 16 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 20% | 15% | 20% |
All times in UTC
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