Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 25 December 2010

By SpaceRef Editor
December 26, 2010
Filed under , , ,

:Product: Report of Solar-Geophysical Activity
:Issued: 2010 Dec 25 2200 UTC
# Prepared jointly by the U.S. Dept. of Commerce, NOAA,
# Space Weather Prediction Center and the U.S. Air Force.
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 359 Issued at 2200Z on 25 Dec 2010
IA. Analysis of Solar Active Regions and Activity from 24/2100Z
to 25/2100Z: Solar activity was very low. Two new regions were
numbered today as Region 1136 (S22W57) and Region 1137 (N18E23).
Both regions are beta magnetic classifications.
IB. Solar Activity Forecast: Solar activity is expected to be very
IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z:
The geomagnetic field was quiet. Observations from the ACE
spacecraft indicate a co-rotating interaction region signature, in
advance of a coronal hole high speed stream, around 25/1430Z. The
IMF Bt reached +10 nT while the IMF Bz was at -7 nT. Solar wind
speeds have continued to increase through the period from 340 km/s
to 400 km/s.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be at quiet to unsettled levels for days one and two
(26-27 December) due to a coronal hole high speed stream and
possible effects from the CME on 23 December. Quiet conditions are
expected for day three (28 December).
III. Event Probabilities 26 Dec-28 Dec
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 25 Dec 079
Predicted 26 Dec-28 Dec 080/080/082
90 Day Mean 25 Dec 083
V. Geomagnetic A Indices
Observed Afr/Ap 24 Dec 003/003
Estimated Afr/Ap 25 Dec 005/005
Predicted Afr/Ap 26 Dec-28 Dec 008/008-007/008-005/005
VI. Geomagnetic Activity Probabilities 26 Dec-28 Dec
A. Middle Latitudes
Active 10/10/05
Minor storm 01/01/01
Major-severe storm 01/01/00
B. High Latitudes
Active 20/20/05
Minor storm 05/05/01
Major-severe storm 01/01/01

SpaceRef staff editor.