Viewing archive of Saturday, 24 March 2012
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2012 Mar 24 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 084 Issued at 2200Z on 24 Mar 2012IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z Solar activity was low. A long duration C7/Sf flare
was observed from Region 1445 (S26E62) at 24/0901Z. This flare was
accompanied by a Type II radio sweep (587 km/s). A slow, weak CME
was later observed in STEREO-B COR2 imagery at 24/1025Z; plane of
sky speed was estimated to be about 400 km/s. This CME is not
expected to be geoeffective. A backsided CME was observed in
LASCO/C2 at 24/0036Z imagery with an estimated plane of sky speed of
700 km/s. It appeared to originate from the vicinity of Old Region
1429.
IB. Solar Activity Forecast
Solar activity is expected to be low
with a chance for an isolated M-class event.
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The geomagnetic field ranged from quiet to active levels. Active
levels were reached during 24/06-09Z after a prolonged period of
southward Bz. The remainder of the day saw quiet to unsettled
levels. The solar wind speed measured at the ACE spacecraft
increased throughout the period, ending around 450 km/s.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at predominantly quiet levels for the next three days
(25-27 March).
III. Event Probabilities 25 Mar to 27 Mar
| Class M | 35% | 35% | 35% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 24 Mar 103 Predicted 25 Mar-27 Mar 110/120/120 90 Day Mean 24 Mar 121
V. Geomagnetic A Indices
Observed Afr/Ap 23 Mar 005/005 Estimated Afr/Ap 24 Mar 010/010 Predicted Afr/Ap 25 Mar-27 Mar 006/005-006/005-006/005
VI. Geomagnetic Activity Probabilities 25 Mar to 27 Mar
| 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 | 15% | 15% | 15% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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