Viewing archive of Thursday, 27 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 27 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 178 Issued at 2200Z on 27 Jun 2013IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z
Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C1 event observed at
27/0814Z from Region 1778 (S17E11). There are currently 5 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a chance for a C-class flares and a slight chance for an M-class
flare on days one, two, and three (28 Jun, 29 Jun, 30 Jun).
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
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
478 km/s at 27/1556Z. Total IMF reached 8 nT at 27/2046Z. The maximum
southward component of Bz reached -6 nT at 27/2033Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 17632 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (28 Jun), quiet to
unsettled levels on day two (29 Jun) and quiet levels on day three (30
Jun).
III. Event Probabilities 28 Jun to 30 Jun
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Jun 100 Predicted 28 Jun-30 Jun 100/105/110 90 Day Mean 27 Jun 123
V. Geomagnetic A Indices
Observed Afr/Ap 26 Jun 002/003 Estimated Afr/Ap 27 Jun 010/014 Predicted Afr/Ap 28 Jun-30 Jun 014/017-008/009-006/005
VI. Geomagnetic Activity Probabilities 28 Jun to 30 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 15% | 05% |
| Minor storm | 20% | 05% | 01% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 30% | 25% | 15% |
| Major-severe storm | 50% | 20% | 05% |
All times in UTC
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