Viewing archive of Friday, 20 June 2014
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 2014 Jun 20 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 171 Issued at 2200Z on 20 Jun 2014IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C5 event observed at
20/1120Z from Region 2093 (S09E08). There are currently 5 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 day one (21 Jun) and likely to be low
with a chance for M-class flares on days two and three (22 Jun, 23 Jun).
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
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
512 km/s at 20/2001Z. Total IMF reached 8 nT at 20/1928Z. The maximum
southward component of Bz reached -7 nT at 20/1349Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 487 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (21 Jun), quiet to minor storm levels
on day two (22 Jun) with the arrival of a coronal mass ejection from 19
June, and quiet to active levels on day three (23 Jun).
III. Event Probabilities 21 Jun to 23 Jun
| Class M | 45% | 35% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 20 Jun 102 Predicted 21 Jun-23 Jun 105/105/100 90 Day Mean 20 Jun 137
V. Geomagnetic A Indices
Observed Afr/Ap 19 Jun 010/009 Estimated Afr/Ap 20 Jun 006/008 Predicted Afr/Ap 21 Jun-23 Jun 006/005-013/018-015/015
VI. Geomagnetic Activity Probabilities 21 Jun to 23 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 40% | 40% |
| Minor storm | 01% | 25% | 20% |
| Major-severe storm | 01% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 20% | 25% |
| Major-severe storm | 05% | 35% | 35% |
All times in UTC
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