Viewing archive of Thursday, 2 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 02 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 153 Issued at 2200Z on 02 Jun 2011IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z Solar activity was low. Region 1226 (S22E01) produced
several C-class events during the period. This region is a Dsi
group with a beta magnetic classification. A further analysis of
LASCO imagery correlated the C4/1f at 01/1708Z from Region 1226 to a
Earth directed partial-halo CME. This event was observed by STEREO
COR2 imagery at 01/2009Z. Region 1227 (S19E13) is also a D-type
group with a beta magnetic classification. It produced a C3/2n at
02/0746Z with an associated Type IV radio sweep, and a Earth
directed partial-halo CME. STEREO COR2 and LASCO C3 imagery
observed the event with a plane-of-sky speed of 831 km/s. New
Region 1232 (N10E61) was numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be low
with a slight chance for an M-class event.
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
The geomagnetic field was quiet to unsettled. The greater than 2 MeV
electron flux at geosynchronous orbit reached high levels during the
period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled for day one (03 June). Active
conditions with isolated minor storm levels are expected for day two
(04 June) as a coronal hole high-speed stream becomes geoeffective,
and additional effects from recent CME activity. Day three (05
June) is expected to be at quiet to unsettled levels, with isolated
active conditions.
III. Event Probabilities 03 Jun to 05 Jun
| Class M | 10% | 10% | 10% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 02 Jun 112 Predicted 03 Jun-05 Jun 112/110/110 90 Day Mean 02 Jun 108
V. Geomagnetic A Indices
Observed Afr/Ap 01 Jun 009/012 Estimated Afr/Ap 02 Jun 008/012 Predicted Afr/Ap 03 Jun-05 Jun 008/012-020/020-015/015
VI. Geomagnetic Activity Probabilities 03 Jun to 05 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 40% | 30% |
| Minor storm | 05% | 20% | 10% |
| Major-severe storm | 01% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 45% | 35% |
| Minor storm | 10% | 25% | 15% |
| Major-severe storm | 01% | 10% | 05% |
All times in UTC
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