Viewing archive of Thursday, 11 July 2013
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 2013 Jul 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 192 Issued at 2200Z on 11 Jul 2013IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C2 event observed at
11/1757Z. There are currently 3 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 and two (12 Jul, 13 Jul) and
likely to be low with a slight chance for an M-class flare on day three
(14 Jul).
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed, as measured by the ACE spacecraft, reached a peak
speed of 494 km/s at 11/1322Z. Total IMF reached 9 nT at 10/2100Z. The
maximum southward component of Bz reached -7 nT at 11/1256Z. Electrons
greater than 2 MeV at geosynchronous orbit reached a peak level of 3338
pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (12 Jul) and quiet to
minor storm levels on days two and three (13 Jul, 14 Jul) due to an
expected CME passage.
III. Event Probabilities 12 Jul to 14 Jul
| Class M | 30% | 25% | 20% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 11 Jul 113 Predicted 12 Jul-14 Jul 110/110/110 90 Day Mean 11 Jul 121
V. Geomagnetic A Indices
Observed Afr/Ap 10 Jul 020/030 Estimated Afr/Ap 11 Jul 013/017 Predicted Afr/Ap 12 Jul-14 Jul 009/008-010/015-018/025
VI. Geomagnetic Activity Probabilities 12 Jul to 14 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 35% | 35% |
| Minor storm | 05% | 15% | 30% |
| Major-severe storm | 01% | 01% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 25% | 30% | 25% |
| Major-severe storm | 25% | 40% | 65% |
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