Viewing archive of Tuesday, 30 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 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 211 Issued at 2200Z on 30 Jul 2013IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C6 event observed at
29/2318Z from Region 1800 (S07W95). There are currently 7 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be low with a
slight chance for an M-class flare on days one, two, and three (31 Jul,
01 Aug, 02 Aug).
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed,
as measured by the ACE spacecraft, reached a peak speed of 418 km/s at
30/0015Z. Total IMF reached 6 nT at 30/1309Z. The maximum southward
component of Bz reached -5 nT at 30/1607Z. Electrons greater than 2 MeV
at geosynchronous orbit reached a peak level of 906 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one and two (31 Jul, 01 Aug) and quiet to
unsettled levels on day three (02 Aug).
III. Event Probabilities 31 Jul to 02 Aug
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Jul 113 Predicted 31 Jul-02 Aug 120/125/130 90 Day Mean 30 Jul 119
V. Geomagnetic A Indices
Observed Afr/Ap 29 Jul 007/006 Estimated Afr/Ap 30 Jul 006/005 Predicted Afr/Ap 31 Jul-02 Aug 004/005-006/005-006/008
VI. Geomagnetic Activity Probabilities 31 Jul to 02 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 25% |
| Major-severe storm | 10% | 10% | 25% |
All times in UTC
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