Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 25 Nov 2009

By SpaceRef Editor
November 25, 2009
Filed under , , ,

:Product: Report of Solar-Geophysical Activity
:Issued: 2009 Nov 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 329 Issued at 2200Z on 25 Nov 2009
IA. Analysis of Solar Active Regions and Activity from 24/2100Z
to 25/2100Z: Solar Activity was very low. No flares occurred during
the past 24 hours.
IB. Solar Activity Forecast: Solar Activity is expected to be very
IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z:
The geomagnetic field was mostly quiet with two isolated unsettled
periods, 25/0000-0600Z. A secondary solar wind data source,
SOHO/MTOF, indicated the earth is currently in a high speed stream,
preceded by a co-rotating interaction region detected by the ACE
spacecraft early yesterday. Wind speeds, as measured by SOHO/MTOF,
averaged 430-470 km/sec during the past 24 hours.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be quiet to unsettled on day one (26 Nov) based on
recurrence. Quiet conditions are expected to return on days two and
three (27-28 Nov).
III. Event Probabilities 26 Nov-28 Nov
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green
IV. Penticton 10.7 cm Flux
Observed 25 Nov 074
Predicted 26 Nov-28 Nov 074/073/071
90 Day Mean 25 Nov 073
V. Geomagnetic A Indices
Observed Afr/Ap 24 Nov 003/006
Estimated Afr/Ap 25 Nov 007/005
Predicted Afr/Ap 26 Nov-28 Nov 007/-99999-005/-99999-005/-99999
VI. Geomagnetic Activity Probabilities 26 Nov-28 Nov
A. Middle Latitudes
Active 20/10/05
Minor storm 10/05/01
Major-severe storm 05/01/01
B. High Latitudes
Active 25/15/05
Minor storm 15/05/01
Major-severe storm 05/01/01

SpaceRef staff editor.