Viewing archive of Wednesday, 15 June 2011
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 2011 Jun 15 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 166 Issued at 2200Z on 15 Jun 2011IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z Solar activity reached moderate levels during the
period. An impulsive M1/Sf flare was observed from Region 1236
(N17E58) at 14/2147Z. The region continued to rotate on to the disk,
and now appears as an E-type group with Beta-Delta magnetic
characteristics. Region 1234 (S15W22) produced a C3/1f at 15/1432Z.
The region doubled in area and spot count, but remained a simple
bi-polar group.
IB. Solar Activity Forecast
Solar activity is expected to be low
with a chance for M-class events all three days of the period (16 -
18 June).
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
The geomagnetic field was quiet. Solar wind velocities steadily
decreased through the period from about 550 km/s to near 450 km/s.
The Bz component of the interplanetary magnetic field began the
period weakly south to about -3 nT. At 15/0900Z, Bz turned weakly
north to about +3 nT, and remained so through the balance of the
period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at mostly quiet levels through day one (16 June) and
the majority of day two (17 June). Late on day two, and through day
three (18 June), quiet to isolated active conditions are possible
due to glancing blow effects from the CME observed early on 14 June.
III. Event Probabilities 16 Jun to 18 Jun
| Class M | 25% | 25% | 25% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 15 Jun 102 Predicted 16 Jun-18 Jun 105/105/105 90 Day Mean 15 Jun 103
V. Geomagnetic A Indices
Observed Afr/Ap 14 Jun 007/007 Estimated Afr/Ap 15 Jun 007/007 Predicted Afr/Ap 16 Jun-18 Jun 005/005-006/007-008/008
VI. Geomagnetic Activity Probabilities 16 Jun to 18 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 15% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 20% |
| Minor storm | 01% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
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