Viewing archive of Friday, 19 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 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 200 Issued at 2200Z on 19 Jul 2013IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z Solar activity has been at very low levels for the past 24
hours. 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 (20 Jul,
21 Jul, 22 Jul).
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
674 km/s at 19/1650Z. Total IMF reached 12 nT at 18/2100Z. The maximum
southward component of Bz reached -9 nT at 19/0122Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 2710 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (20 Jul), unsettled
to active levels on day two (21 Jul) and quiet to unsettled levels on
day three (22 Jul).
III. Event Probabilities 20 Jul to 22 Jul
| Class M | 15% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 19 Jul 114 Predicted 20 Jul-22 Jul 115/115/115 90 Day Mean 19 Jul 121
V. Geomagnetic A Indices
Observed Afr/Ap 18 Jul 016/015 Estimated Afr/Ap 19 Jul 011/014 Predicted Afr/Ap 20 Jul-22 Jul 014/020-011/015-008/010
VI. Geomagnetic Activity Probabilities 20 Jul to 22 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 25% |
| Minor storm | 20% | 10% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 25% | 30% | 30% |
| Major-severe storm | 50% | 40% | 30% |
All times in UTC
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