Joint USAF/NOAA Report of Solar and Geophysical Activity
7 Sep 2012
IA. Analysis of Solar Active Regions and Activity from 05/2100Z
to 06/2100Z: Solar activity was moderate. Region 1560 (N04W73 -
Eai/beta-gamma) produced an impulsive M1 x-ray flare at 06/0413Z as
well as occasional low-level C-class flares. No obvious changes were
noted in Region 1560, but limb proximity hampered analysis. Region
1564 (S14W13 - Esi/beta) also produced occasional low-level C-class
flares. It showed minor spot and penumbral growth in its interior
portion. Region 1562 (S22W48 - Dso/beta) showed gradual spot and
penumbral growth during the period. No new regions were numbered. No
Earth-directed CME activity occurred during the period.
IB. Solar Activity Forecast: Solar activity is expected to be low
through the period (07 - 09 September) with a chance for an isolated
M-class flare on day 1. There will be a slight chance for an
isolated M-class flare during days 2 - 3.
IIA. Geophysical Activity Summary 05/2100Z to 06/2100Z:
Geomagnetic field activity ranged from quiet to active levels. Active
levels occurred during 06/0000 - 0300Z due to periods of southward
IMF Bz and enhanced IMF Bt associated with a solar sector boundary
change. Field activity decreased to mostly quiet levels after
06/0300Z.
IIB. Geophysical Activity Forecast: Geomagnetic field activity is
expected to be at quiet levels through the period (07 - 09
September) with a chance for unsettled levels.
