Viewing archive of Saturday, 22 June 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 Jun 22 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 173 Issued at 2200Z on 22 Jun 2013IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z
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
21/2217Z from Region 1772 (S22W38). There are currently 8 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, two, and three (23 Jun, 24 Jun,
25 Jun).
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
710 km/s at 22/0358Z. Total IMF reached 8 nT at 22/0705Z. The maximum
southward component of Bz reached -7 nT at 21/2234Z. Protons greater
than 10 MeV at geosynchronous orbit reached a peak level of 6 pfu at
22/1700Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 803 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (23 Jun), unsettled to active
levels on day two (24 Jun) and quiet to unsettled levels on day three
(25 Jun). Protons greater than 10 Mev have a slight chance of crossing
threshold on days one and two (23 Jun, 24 Jun).
III. Event Probabilities 23 Jun to 25 Jun
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 10% | 10% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 22 Jun 130 Predicted 23 Jun-25 Jun 130/130/130 90 Day Mean 22 Jun 122
V. Geomagnetic A Indices
Observed Afr/Ap 21 Jun 017/019 Estimated Afr/Ap 22 Jun 011/015 Predicted Afr/Ap 23 Jun-25 Jun 009/012-015/018-010/010
VI. Geomagnetic Activity Probabilities 23 Jun to 25 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 35% | 20% |
| Minor storm | 05% | 15% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 15% |
| Minor storm | 30% | 25% | 25% |
| Major-severe storm | 30% | 50% | 25% |
All times in UTC
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