Report of Solar Geophysical Activity
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 313 Issued at 2200Z on 09 Nov 2015 IA. Analysis of Solar Active Regions and Activity from 08/2100Z to 09/2100Z: Solar activity has been at moderate levels for the past 24 hours. The largest solar event of the period was a M3 event observed at 09/1312Z from Region 2449 (S11E32). There are currently 4 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be low with a chance for M-class flares on days one, two, and three (10 Nov, 11 Nov, 12 Nov). IIA. Geophysical Activity Summary 08/2100Z to 09/2100Z: The geomagnetic field has been at unsettled to active levels for the past 24 hours. Solar wind speed, as measured by the ACE spacecraft, reached a peak speed of 634 km/s at 09/2038Z. Total IMF reached 12 nT at 09/1926Z. The maximum southward component of Bz reached -8 nT at 09/1448Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 17885 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to minor storm levels on day one (10 Nov), quiet to active levels on day two (11 Nov) and quiet to unsettled levels on day three (12 Nov). III. Event probabilities 10 Nov-12 Nov Class M 25/25/25 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 09 Nov 108 Predicted 10 Nov-12 Nov 105/110/110 90 Day Mean 09 Nov 105 V. Geomagnetic A Indices Observed Afr/Ap 08 Nov 011/015 Estimated Afr/Ap 09 Nov 020/025 Predicted Afr/Ap 10 Nov-12 Nov 015/020-010/012-007/008 VI. Geomagnetic Activity Probabilities 10 Nov-12 Nov A. Middle Latitudes Active 45/25/15 Minor Storm 15/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 10/15/20 Minor Storm 30/30/30 Major-severe storm 55/30/20 Radio Events Observed 09 Nov 2015 A. 245 MHz Bursts Start End Peak Flux Time of Peak Duration 1303 1330 1900 1317 0027 1345 1346 140 1346 0001 1349 1351 120 1349 0002 1442 1450 170 1448 0008 1455 1519 330 1507 0024 B. 245 MHz Noise Storms No 245 MHz Noise Storms Observed. CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 2271 Begin Time: 2015 Nov 04 1405 UTC Yesterday Maximum 2MeV Flux: 17885 pfu www.swpc.noaa.gov/phenomena/solar-radiation-storm www.sec.noaa.gov/NOAAscales
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