Viewing archive of Saturday, 14 August 2010
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 2010 Aug 14 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 226 Issued at 2200Z on 14 Aug 2010IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z Solar activity was low. Region 1099 (N18W58) produced a
C4/Sf flare at 14/1005Z with an associated CME. The STEREO-A
spacecraft observed a full-halo signature first visible on COR2 at
14/1109Z. A Type II radio sweep (estimated velocity 406 km/s) was
also observed with this event.
IB. Solar Activity Forecast
Solar activity is expected to be very
low, with a chance for C-class flares.
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
The geomagnetic field was at quiet levels. The greater than 2 MeV
electron flux at geosynchronous orbit reached high levels again
today. The greater than 10 MeV protons at geosynchronous orbit
exceeded threshold at 14/1230Z with a peak flux of 14 pfu at
14/1245Z. The event ended at 14/1410Z. The source is believed to be
region 1099.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to be unsettled to active for the next three days. The
increase in activity is in response to a coronal hole high-speed
stream on days one and two (15 - 16 August). The activity on day
three (17 August) is in response to the CME observed on 14 August.
III. Event Probabilities 15 Aug to 17 Aug
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 14 Aug 085 Predicted 15 Aug-17 Aug 085/085/085 90 Day Mean 14 Aug 077
V. Geomagnetic A Indices
Observed Afr/Ap 13 Aug 003/004 Estimated Afr/Ap 14 Aug 005/005 Predicted Afr/Ap 15 Aug-17 Aug 007/008-010/012-015/018
VI. Geomagnetic Activity Probabilities 15 Aug to 17 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 30% |
| Minor storm | 01% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 30% | 40% |
| Minor storm | 05% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
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