solar cycle 24

Corona Mass Ejection

3-Day Report of Solar
and Geophysical Activity

Last 75 Daily Reports Online Data at SEC
Today's Space Weather Space Weather Now

Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Weather Prediction Center and the U.S. Air Force.

Updated 2008 Jan 05 2203 UTC


Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 005 Issued at 2200Z on 05 Jan 2008

IA. Analysis of Solar Active Regions and Activity from 04/2100Z
to 05/2100Z: Solar activity was very low. No flares were observed
during the past 24 hours. Region 981 (N29E14) is currently the only
spotted region on the disk but is quiet and stable.

IB. Solar Activity Forecast: Solar activity is expected to be very
low.

IIA. Geophysical Activity Summary 04/2100Z to 05/2100Z:
The geomagnetic field was initially quiet but after 0600Z became
predominantly unsettled to active with isolated minor storming in
some locations. Real-time solar wind observations showed a marked
increase in velocity, magnetic field and temperature at about
04/2330Z, and then again at 05/0600Z. The signatures are most
consistent with a high-speed stream from a coronal hole, although
there may have been some complicating influence from the interaction
of recent transient activity with the stream.

IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be mostly unsettled to active for the next two days
(06-07 January) due to ongoing persistence from the high speed
stream. Activity is expected to subside somewhat on the third day
(08 January) as the stream should be declining at that time.

III. Event Probabilities 06 Jan-08 Jan
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green

IV. Penticton 10.7 cm Flux
Observed 05 Jan 080
Predicted 06 Jan-08 Jan 080/080/080
90 Day Mean 05 Jan 073

V. Geomagnetic A Indices
Observed Afr/Ap 04 Jan 002/002
Estimated Afr/Ap 05 Jan 015/015
Predicted Afr/Ap 06 Jan-08 Jan 012/015-012/015-007/010

VI. Geomagnetic Activity Probabilities 06 Jan-08 Jan
A. Middle Latitudes
Active 45/45/15
Minor storm 15/15/10
Major-severe storm 05/05/01
B. High Latitudes
Active 40/40/25
Minor storm 25/25/15
Major-severe storm 10/10/05

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