Status Report

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 22 December 2014

By SpaceRef Editor
December 22, 2014
Filed under , , ,
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 22 December 2014

 

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast

SDF Number 356 Issued at 2200Z on 22 Dec 2014

 

IA.  Analysis of Solar Active Regions and Activity from 21/2100Z to

22/2100Z: Solar activity has been at moderate levels for the past 24 hours. The largest solar event of the period was a M1 event observed at 22/0149Z from Region 2242 (S17W71). There are currently 7 numbered sunspot regions on the disk.

 

IB.  Solar Activity Forecast: Solar activity is expected to be moderate with a chance for X-class flares on days one, two, and three (23 Dec, 24 Dec, 25 Dec).

 

IIA.  Geophysical Activity Summary 21/2100Z to 22/2100Z: The geomagnetic field has been at quiet to minor storm levels for the past 24 hours. Solar wind speed, as measured by the ACE spacecraft, reached a peak speed of 497 km/s at 22/1645Z. Total IMF reached 26 nT at 22/1657Z. The maximum southward component of Bz reached -16 nT at 22/0120Z. Protons greater than 10 MeV at geosynchronous orbit reached a peak level of 3 pfu at 21/2120Z.

 

IIB.  Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to minor storm levels on day one (23 Dec) and quiet to unsettled levels on days two and three (24 Dec, 25 Dec). Protons have a chance of crossing threshold on day one (23 Dec) and have a slight chance of crossing threshold on days two and three (24 Dec, 25 Dec).

 

III.  Event probabilities 23 Dec-25 Dec

Class M    80/75/75

Class X    35/30/30

Proton     25/20/20

PCAF       green

 

IV.  Penticton 10.7 cm Flux

Observed           22 Dec 179

Predicted   23 Dec-25 Dec 175/170/160

90 Day Mean        22 Dec 158

 

V.  Geomagnetic A Indices

Observed Afr/Ap 21 Dec  010/012

Estimated Afr/Ap 22 Dec  021/027

Predicted Afr/Ap 23 Dec-25 Dec  013/015-007/008-007/008

 

VI.  Geomagnetic Activity Probabilities 23 Dec-25 Dec

A.  Middle Latitudes

Active                35/15/10

Minor Storm           25/05/01

Major-severe storm    05/01/01

B.  High Latitudes

Active                10/20/15

Minor Storm           20/25/20

Major-severe storm    60/20/10

 

SpaceRef staff editor.