Viewing archive of Thursday, 4 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 04 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 185 Issued at 2200Z on 04 Jul 2013IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C8 event observed at
04/0008Z from Region 1785 (S12E36). 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 and a slight chance for an X-class flare on
days one, two, and three (05 Jul, 06 Jul, 07 Jul).
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
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 395 km/s at
04/1948Z. Total IMF reached 5 nT at 04/1108Z. The maximum southward
component of Bz reached -4 nT at 04/1505Z. Electrons greater than 2 MeV
at geosynchronous orbit reached a peak level of 6615 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (05 Jul), quiet to
active levels on day two (06 Jul) and quiet levels on day three (07
Jul).
III. Event Probabilities 05 Jul to 07 Jul
| Class M | 40% | 40% | 40% |
| Class X | 10% | 10% | 10% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 04 Jul 138 Predicted 05 Jul-07 Jul 140/140/135 90 Day Mean 04 Jul 122
V. Geomagnetic A Indices
Observed Afr/Ap 03 Jul 004/004 Estimated Afr/Ap 04 Jul 006/006 Predicted Afr/Ap 05 Jul-07 Jul 016/020-012/015-007/008
VI. Geomagnetic Activity Probabilities 05 Jul to 07 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 25% | 15% |
| Minor storm | 20% | 10% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 60% | 40% | 20% |
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