Viewing archive of Monday, 9 July 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 Jul 09 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 191 Issued at 2200Z on 09 Jul 2012

IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z

Solar activity was low. Region 1515 (S15W89) produced the largest event of the period, a C7/Sf at 09/0830Z. Region 1520 (S17E33) continued its growth phase in area coverage, spot count and magnetic complexity, but remained relatively quiet through the period. New Region 1521 (S22E21) was numbered as a D-type group. A large filament eruption was observed in the SW quadrant at about 09/0930Z. At the time of its eruption, the 23 degree long filament was centered near S35W32. No Earth-directed CMEs were observed during the previous 24 hours.
IB. Solar Activity Forecast
Solar activity is expected to be moderate with a chance for X-class events for the next three days (10 - 12 July).
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
The geomagnetic field was at unsettled to minor storm levels with high latitude major storm intervals. This activity was most likely a result of CME effects from the 04 July M1 event. ACE solar data indicated wind velocities ranged between 400 to 450 km/s. The Bz component of the interplanetary magnetic field was generally south throughout the period ranging between -5 to -10 nT from about 09/0600Z through the end of the period. Interplanetary field strength was at 10 to 12 nT through most of the period. A greater than 10 MeV proton event at geosynchronous orbit began at 09/0130Z, reached a maximum of 19 pfu at 09/0430Z and ended at 09/1445Z. This weak SEP event was most likely associated with the 08 July M6/1n flare from Region 1515.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at mostly quiet to unsettled levels with isolated active periods on day one (10 July) due to possible weak effects from the 06 July CME. A return to mostly quiet conditions is expected for days two and three (11 - 12 July).
III. Event Probabilities 10 Jul to 12 Jul
Class M80%80%80%
Class X25%25%25%
Proton10%10%10%
PCAFyellow
IV. Penticton 10.7 cm Flux
  Observed       09 Jul 174
  Predicted   10 Jul-12 Jul  165/160/155
  90 Day Mean        09 Jul 125
V. Geomagnetic A Indices
  Observed Afr/Ap 08 Jul  015/011
  Estimated     Afr/Ap 09 Jul  018/027
  Predicted    Afr/Ap 10 Jul-12 Jul  013/015-007/010-005/005
VI. Geomagnetic Activity Probabilities 10 Jul to 12 Jul
A. Middle Latitudes
Active20%10%05%
Minor storm05%01%01%
Major-severe storm01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm30%20%15%
Major-severe storm25%10%05%

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