Viewing archive of Saturday, 11 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 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 162 Issued at 2200Z on 11 Jun 2011IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z Solar activity decreased to very low levels. Occasional
B-class x-ray flares occurred. There were three small,
simply-structured spots groups on the disk, including newly-numbered
Region 1235 (N14E27). No Earth-directed coronal mass ejections
occurred during the period.
IB. Solar Activity Forecast
Solar activity is expected to be very
low through the period (12 - 14 June) with a slight chance for a
C-class flare.
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
Geomagnetic activity was at quiet to active levels. Active levels
occurred during 11/0300 - 0600Z, associated with a period of
increased interplanetary magnetic field (IMF) Bt (peak 10 nT) and
southward IMF Bz (peak deflection -8 nT). ACE solar wind data
indicated a co-rotating interaction region occurred during the first
half of the period, in advance of a coronal hole high-speed stream
(CH HSS). The CH HSS commenced around 11/1025Z, followed by a
gradual increase in solar wind speeds (380 to 460 km/s) during the
rest of the period.
IIB. Geophysical Activity Forecast
Geomagnetic activity is
expected to be at quiet to unsettled levels during days 1 - 3 (12 -
14 June) with a chance for brief active periods due to CH HSS
effects.
III. Event Probabilities 12 Jun to 14 Jun
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 11 Jun 085 Predicted 12 Jun-14 Jun 084/084/084 90 Day Mean 11 Jun 104
V. Geomagnetic A Indices
Observed Afr/Ap 10 Jun 007/008 Estimated Afr/Ap 11 Jun 012/012 Predicted Afr/Ap 12 Jun-14 Jun 008/008-008/008-007/007
VI. Geomagnetic Activity Probabilities 12 Jun to 14 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 15% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 20% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 01% | 01% | 01% |
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