Viewing archive of Thursday, 19 July 2018

Solar activity report

Report of Solar-Geophysical Activity 2018 Jul 19 2200 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 200 Issued at 2200Z on 19 Jul 2018

IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z

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 (20 Jul, 21 Jul, 22 Jul).
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 413 km/s at 19/1950Z. Total IMF reached 5 nT at 19/1538Z. The maximum southward component of Bz reached -4 nT at 19/1610Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on day one (20 Jul) and quiet to unsettled levels on days two and three (21 Jul, 22 Jul).
III. Event Probabilities 20 Jul to 22 Jul
Class M01%01%01%
Class X01%01%01%
IV. Penticton 10.7 cm Flux
  Observed       19 Jul 071
  Predicted   20 Jul-22 Jul 070/070/070
  90 Day Mean        19 Jul 072

V. Geomagnetic A Indices
  Observed Afr/Ap 18 Jul  004/004
  Estimated     Afr/Ap 19 Jul  004/004
  Predicted    Afr/Ap 20 Jul-22 Jul  012/015-007/008-009/012

VI. Geomagnetic Activity Probabilities 20 Jul to 22 Jul
A. Middle Latitudes
Minor storm10%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Minor storm30%25%30%
Major-severe storm40%25%35%

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