Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 27 April 2010

By SpaceRef Editor
April 27, 2010
Filed under , , ,

:Product: Report of Solar-Geophysical Activity
:Issued: 2010 Apr 27 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 117 Issued at 2200Z on 27 Apr 2010
IA. Analysis of Solar Active Regions and Activity from 26/2100Z
to 27/2100Z: Solar activity was very low. No flares were observed
during the past 24 hours.
IB. Solar Activity Forecast: Solar activity is expected to be very
IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z:
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be quiet with isolated periods of unsettled conditions
for days one and two (28-29 April) due to possible effects from a
coronal hole high speed stream. Predominantly quiet levels are
expected for day three (30 April).
III. Event Probabilities 28 Apr-30 Apr
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green
IV. Penticton 10.7 cm Flux
Observed 27 Apr 075
Predicted 28 Apr-30 Apr 076/076/076
90 Day Mean 27 Apr 081
V. Geomagnetic A Indices
Observed Afr/Ap 26 Apr 000/002
Estimated Afr/Ap 27 Apr 003/003
Predicted Afr/Ap 28 Apr-30 Apr 007/007-007/007-005/005
VI. Geomagnetic Activity Probabilities 28 Apr-30 Apr
A. Middle Latitudes
Active 10/10/05
Minor storm 05/05/01
Major-severe storm 01/01/01
B. High Latitudes
Active 15/15/05
Minor storm 05/05/01
Major-severe storm 01/01/01

SpaceRef staff editor.