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 UTC
Prepared 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 2018

IA. 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 M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
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
Active05%10%05%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm10%15%10%
Major-severe storm10%15%10%

All times in UTC

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