Viewing archive of Saturday, 7 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 07 2200 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 97 Issued at 2200Z on 07 Apr 2018

IA. Analysis of Solar Active Regions and Activity from 06-2100Z to 07-2100Z

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 (08 Apr, 09 Apr, 10 Apr).
IIA. Geophysical Activity Summary 06-2100Z to 07-2100Z
The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 383 km/s at 07/1948Z. Total IMF reached 5 nT at 07/1809Z. The maximum southward component of Bz reached -3 nT at 07/2029Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 314 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet levels on days one and two (08 Apr, 09 Apr) and quiet to minor storm levels on day three (10 Apr).
III. Event Probabilities 08 Apr to 10 Apr
Class M01%01%01%
Class X01%01%01%
IV. Penticton 10.7 cm Flux
  Observed       07 Apr 067
  Predicted   08 Apr-10 Apr 067/067/067
  90 Day Mean        07 Apr 070

V. Geomagnetic A Indices
  Observed Afr/Ap 06 Apr  003/003
  Estimated     Afr/Ap 07 Apr  005/005
  Predicted    Afr/Ap 08 Apr-10 Apr  006/005-006/005-012/015

VI. Geomagnetic Activity Probabilities 08 Apr to 10 Apr
A. Middle Latitudes
Minor storm01%01%25%
Major-severe storm01%01%05%
B. High Latitudes
Minor storm15%15%30%
Major-severe storm15%15%55%

All times in UTC

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