Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 28 May 2012

By SpaceRef Editor
May 28, 2012
Filed under , , ,

:Product: Report of Solar-Geophysical Activity
:Issued: 2012 May 28 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 149 Issued at 2200Z on 28 May 2012
IA. Analysis of Solar Active Regions and Activity from 27/2100Z
to 28/2100Z: Solar activity was very low. Region 1491 (N22W70)
produced a B7 flare at 28/1249Z, which was the largest flare of the
period. Region 1490 (S13E04) produced three nominal B-class flares
during the period. A CME associated with a filament eruption was
observed in LASCO C2 imagery at 28/0800Z off of the northwest
quadrant of the solar disk. The CME does not appear to be Earth
IB. Solar Activity Forecast: Solar activity is expected to be very
low to low for the next three days (29-31 May).
IIA. Geophysical Activity Summary 27/2100Z to 28/2100Z:
The geomagnetic field was quiet to unsettled. The greater than 2 MeV
electron flux at geosynchronous orbit reached high levels during the
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be mostly quiet for the next three days (29-31 May).
III. Event Probabilities 29 May-31 May
Class M 05/05/05
Class X 01/01/01
Proton 01/01/01
PCAF green
IV. Penticton 10.7 cm Flux
Observed 28 May 110
Predicted 29 May-31 May 110/110/110
90 Day Mean 28 May 117
V. Geomagnetic A Indices
Observed Afr/Ap 27 May 003/005
Estimated Afr/Ap 28 May 005/007
Predicted Afr/Ap 29 May-31 May 004/005-004/005-004/005
VI. Geomagnetic Activity Probabilities 29 May-31 May
A. Middle Latitudes
Active 05/05/05
Minor storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 15/15/15
Minor storm 10/10/10
Major-severe storm 05/05/05

SpaceRef staff editor.