Viewing archive of Monday, 30 April 2018
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2018 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 2018IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 0 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
on days one, two, and three (01 May, 02 May, 03 May).
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 478 km/s at 30/1135Z. Total IMF reached 8
nT at 30/0214Z. The maximum southward component of Bz reached -6 nT at
30/0120Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 1265 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (01 May, 02 May, 03
May).
III. Event Probabilities 01 May to 03 May
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Apr 070 Predicted 01 May-03 May 070/069/068 90 Day Mean 30 Apr 070
V. Geomagnetic A Indices
Observed Afr/Ap 29 Apr 003/003 Estimated Afr/Ap 30 Apr 006/007 Predicted Afr/Ap 01 May-03 May 006/005-006/005-005/005
VI. Geomagnetic Activity Probabilities 01 May to 03 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 05% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 15% | 10% |
| Major-severe storm | 10% | 15% | 10% |
All times in UTC
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