Viewing archive of Wednesday, 10 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 10 2200 UTCPrepared 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 10 Jul 2013IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C4 event observed at
10/0640Z from Region 1787 (S12W24). There are currently 2 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one and two (11 Jul,
12 Jul) and expected to be low with a chance for M-class flares on day
three (13 Jul).
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
The geomagnetic
field has been at unsettled to minor storm levels for the past 24 hours.
Solar wind speed, as measured by the ACE spacecraft, reached a peak
speed of 490 km/s at 10/1950Z. Total IMF reached 17 nT at 09/2100Z. The
maximum southward component of Bz reached -12 nT at 10/0043Z. Electrons
greater than 2 MeV at geosynchronous orbit reached a peak level of 1829
pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (11 Jul), quiet levels on
day two (12 Jul) and quiet to active levels on day three (13 Jul).
Protons greater than 10 Mev have a slight chance of crossing threshold
on days one and two (11 Jul, 12 Jul).
III. Event Probabilities 11 Jul to 13 Jul
| Class M | 55% | 55% | 40% |
| Class X | 10% | 10% | 05% |
| Proton | 10% | 10% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 10 Jul 118 Predicted 11 Jul-13 Jul 115/115/115 90 Day Mean 10 Jul 121
V. Geomagnetic A Indices
Observed Afr/Ap 09 Jul 008/010 Estimated Afr/Ap 10 Jul 019/025 Predicted Afr/Ap 11 Jul-13 Jul 009/012-007/008-009/015
VI. Geomagnetic Activity Probabilities 11 Jul to 13 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 10% | 25% |
| Minor storm | 05% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 20% | 20% | 25% |
| Major-severe storm | 15% | 10% | 25% |
All times in UTC
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