Viewing archive of Sunday, 28 April 2019

Solar activity report

Report of Solar-Geophysical Activity 2019 Apr 28 2200 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 118 Issued at 2200Z on 28 Apr 2019

IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z

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 (29 Apr, 30 Apr, 01 May).
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 398 km/s at 28/2043Z. Total IMF reached 6 nT at 27/2105Z. The maximum southward component of Bz reached -4 nT at 27/2102Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on days one, two, and three (29 Apr, 30 Apr, 01 May).
III. Event Probabilities 29 Apr to 01 May
Class M01%01%01%
Class X01%01%01%
IV. Penticton 10.7 cm Flux
  Observed       28 Apr 068
  Predicted   29 Apr-01 May 068/068/068
  90 Day Mean        28 Apr 072

V. Geomagnetic A Indices
  Observed Afr/Ap 27 Apr  005/005
  Estimated     Afr/Ap 28 Apr  005/005
  Predicted    Afr/Ap 29 Apr-01 May  008/008-007/008-007/008

VI. Geomagnetic Activity Probabilities 29 Apr to 01 May
A. Middle Latitudes
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Minor storm30%30%30%
Major-severe storm25%25%25%

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