Viewing archive of Saturday, 2 June 2012
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 2012 Jun 02 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 154 Issued at 2200Z on 02 Jun 2012IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z Solar activity was low. A C3 flare was observed from
the west limb at 01/2241Z. It was accompanied by a Type II radio
emission (936 km/s) and a non-earth-directed CME. Region 1498
(N08E55) produced a C2 flare at 02/0105Z and 1493 (N15E35) produced
C1 flare at 02/0431Z. New flux emerged near S12W40 and N17E65. All
eight regions on the disk exhibited simple beta magnetic
characteristics.
IB. Solar Activity Forecast
Solar activity is expected to be low
with a slight chance for an M-class flare.
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
The geomagnetic field was primarily quiet for the first half of the
day, increasing to unsettled levels during the 15-18Z synoptic
period. At the ACE spacecraft, low energy particles detected by the
EPAM instrument began rising about 02/06Z, finally leveling off
around 02/14Z. Bz began turning southward around 02/1410Z,
decreasing to around -7 nT where it remained. The solar sector
switched from negative to positive at the same time. Solar wind
speed ranged between 340 and 360 km/s.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to begin at quiet to unsettled levels, with a chance for an
isolated active period on day one (3 June). Activity is expected to
increase to unsettled levels on day two (4 June) and active levels
on day three (5 June), with a chance for minor storm periods both
days. The disturbance is expected as a recurrent coronal hole high
speed stream becomes geoeffective.
III. Event Probabilities 03 Jun to 05 Jun
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 02 Jun 129 Predicted 03 Jun-05 Jun 130/130/130 90 Day Mean 02 Jun 117
V. Geomagnetic A Indices
Observed Afr/Ap 01 Jun 006/006 Estimated Afr/Ap 02 Jun 006/007 Predicted Afr/Ap 03 Jun-05 Jun 009/010-013/015-015/020
VI. Geomagnetic Activity Probabilities 03 Jun to 05 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 35% | 35% |
| Minor storm | 10% | 20% | 20% |
| Major-severe storm | 01% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 10% |
| Minor storm | 25% | 30% | 25% |
| Major-severe storm | 30% | 50% | 50% |
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