Viewing archive of Sunday, 19 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 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 170 Issued at 2200Z on 19 Jun 2011IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z Solar activity was low. Regions 1234 (S16W74) and 1237
(S15E39) each produced a C-class flare during the period. Region
1234 showed no significant change as it approached the west limb.
Region 1236 (N15E06) produced an isolated B-class flare. It showed
no significant changes and remained an E-type group with a
beta-gamma magnetic configuration. A C1/Sf flare from Region 1237 at
19/1637Z was associated with a partial-halo coronal mass ejection
(CME). The CME had an estimated plane-of-sky speed of 519 km/s and
appeared to have an Earthward component. New Region 1238 (S17E11), a
two-spot Axx group, was numbered.
IB. Solar Activity Forecast
Solar activity is expected to be very
low to low during the period (20 - 22 June).
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
Geomagnetic field activity was at quiet levels.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to increase to quiet to unsettled levels during days 1 - 2
(20 - 21 June) with a chance for brief active periods due to a
coronal hole high-speed stream. Activity is expected to decrease to
quiet levels on day 3 (22 June). The CME mentioned above is not
expected to disturb the field during the forecast period.
III. Event Probabilities 20 Jun to 22 Jun
| Class M | 15% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 19 Jun 099 Predicted 20 Jun-22 Jun 100/095/095 90 Day Mean 19 Jun 104
V. Geomagnetic A Indices
Observed Afr/Ap 18 Jun 004/004 Estimated Afr/Ap 19 Jun 003/005 Predicted Afr/Ap 20 Jun-22 Jun 007/008-007/008-005/005
VI. Geomagnetic Activity Probabilities 20 Jun to 22 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 10% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 15% |
| Minor storm | 10% | 10% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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