Viewing archive of Saturday, 30 April 2022
Solar activity report
Report of Solar-Geophysical Activity 2022 Apr 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 120 Issued at 2200Z on 30 Apr 2022IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity has been at high levels for the past 24 hours.
The largest solar event of the period was a X1 event observed at
30/1347Z from Region 2994 (N15, L=106) beyond the west limb. There are
currently 4 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
day one (01 May) and likely to be low with a slight chance for an
M-class flare on day two (02 May) and likely to be low on day three (03
May).
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed reached a peak of 540 km/s at 30/1621Z. Total IMF
reached 11 nT at 30/0019Z. The maximum southward component of Bz reached
-9 nT at 30/0023Z. Protons greater than 10 MeV at geosynchronous orbit
reached a peak level of 4 pfu at 29/2145Z. Electrons greater than 2 MeV
at geosynchronous orbit reached a peak level of 1061 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and two (01 May, 02 May) and
quiet to unsettled levels on day three (03 May). Protons greater than 10
Mev have a slight chance of crossing threshold on days one and two (01
May, 02 May).
III. Event Probabilities 01 May to 03 May
| Class M | 35% | 15% | 01% |
| Class X | 15% | 01% | 01% |
| Proton | 10% | 10% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Apr 120 Predicted 01 May-03 May 110/105/105 90 Day Mean 30 Apr 119
V. Geomagnetic A Indices
Observed Afr/Ap 29 Apr 010/013 Estimated Afr/Ap 30 Apr 015/019 Predicted Afr/Ap 01 May-03 May 012/015-012/015-007/008
VI. Geomagnetic Activity Probabilities 01 May to 03 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 10% |
| Minor storm | 15% | 15% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 30% | 20% |
| Major-severe storm | 45% | 45% | 20% |
All times in UTC
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