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Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 14 April 2018

Status Report From: Space Weather Prediction Center (NOAA)
Posted: Saturday, April 14, 2018

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 104 Issued at 2200Z on 14 Apr 2018

IA.  Analysis of Solar Active Regions and Activity from 13/2100Z to 14/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 1 numbered sunspot regions on the disk.

IB.  Solar Activity Forecast: Solar activity is expected to be very low on days one, two, and three (15 Apr, 16 Apr, 17 Apr).

IIA.  Geophysical Activity Summary 13/2100Z to 14/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 467 km/s at 13/2125Z. Total IMF reached 5 nT at 14/1340Z. The maximum southward component of Bz reached -4 nT at 14/1909Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 20707 pfu.

IIB.  Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one, two, and three (15 Apr, 16 Apr, 17 Apr).

III.  Event probabilities 15 Apr-17 Apr
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           14 Apr 070
Predicted   15 Apr-17 Apr 070/070/070
90 Day Mean        14 Apr 070

V.  Geomagnetic A Indices
Observed Afr/Ap 13 Apr  008/008
Estimated Afr/Ap 14 Apr  004/005
Predicted Afr/Ap 15 Apr-17 Apr  005/005-006/005-006/005

VI.  Geomagnetic Activity Probabilities 15 Apr-17 Apr
A.  Middle Latitudes
Active                10/10/10
Minor Storm           01/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                20/20/20
Minor Storm           20/20/20
Major-severe storm    10/10/10

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