Viewing archive of Wednesday, 14 August 2002
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 2002 Aug 14 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.comJoint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 226 Issued at 2200Z on 14 Aug 2002
IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z
Solar activity remained at moderate levels. Region 61
(N08W69) produced a long-duration M2/1n flare at 14/0212 UTC
associated with a Type II radio sweep, partial-halo CME, and a solar
proton event. Region 61 had been in a state of gradual decay for the
last several days. Region 67 (N11E20) produced an M1/1f flare at
14/1815 UTC as well as a few C-class flares. It was in a growth
phase during the period. Region 69 (S08E37) produced isolated
C-class flares as it continued to gradually increase in area, which
now exceeds 1500 millionths of the solar disk. Region 66 (N13E03)
produced isolated C-class flares as it grew at a gradual pace. New
Regions 78 (S13W12), 79 (S20E55), and 80 (N16E69) were numbered
today.
IB. Solar Activity Forecast
Solar activity is expected to be at
low to moderate levels. Isolated M-class flares are possible through
the period. There is a slight chance for a major flare from Region
69.
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
Geomagnetic field activity was at quiet to unsettled levels during
most of the period, with brief active periods detected at high
latitudes. A greater than 10 MeV proton event began at
geo-synchronous orbit at 14/0900 UTC and reached a preliminary
maximum of 26 pfu at 14/1620 UTC. The greater than 2 MeV electron
flux at geo-synchronous orbit increased to moderate to high levels
during the period.
IIB. Geophysical Activity Forecast
A geomagnetic disturbance is
expected to begin during the latter half of 15 August and continue
into 16 August following today's long-duration M2/partail-halo CME
event. Active to minor storm conditions are expected during this
disturbance. Field activity is expected to decrease to quiet to
unsettled levels on 17 August. The greater than 10 MeV proton event
is expected to end sometime during the first half of the forecast
period. The greater than 2 MeV electron flux is expected to be at
moderate to high levels during the period.
III. Event Probabilities 15 Aug to 17 Aug
Class M | 45% | 45% | 45% |
Class X | 05% | 05% | 05% |
Proton | 90% | 75% | 40% |
PCAF | yellow
|
IV. Penticton 10.7 cm Flux
Observed 14 Aug 208
Predicted 15 Aug-17 Aug 210/215/215
90 Day Mean 14 Aug 165
V. Geomagnetic A Indices
Observed Afr/Ap 13 Aug 009/013
Estimated Afr/Ap 14 Aug 012/015
Predicted Afr/Ap 15 Aug-17 Aug 015/020-025/030-012/015
VI. Geomagnetic Activity Probabilities 15 Aug to 17 Aug
A. Middle Latitudes |
Active | 40% | 35% | 25% |
Minor storm | 20% | 30% | 10% |
Major-severe storm | 05% | 10% | 01% |
B. High Latitudes |
Active | 45% | 30% | 30% |
Minor storm | 25% | 35% | 15% |
Major-severe storm | 10% | 20% | 01% |
All times in UTC
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