Viewing archive of Thursday, 6 May 2010
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 2010 May 06 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 126 Issued at 2200Z on 06 May 2010IA. Analysis of Solar Active Regions and Activity from 05-2100Z to 06-2100Z Solar activity decreased to very low levels. A single
low-level B-class flare occurred during the period. Region 1069
(N42W51) showed a decrease in area, but maintained a beta-gamma
magnetic configuration. An eruptive prominence and associated CME
(estimated velocity 507 km/sec) occurred near the southwest limb
very early in the period. The CME did not appear to be
Earth-directed.
IB. Solar Activity Forecast
Solar activity is expected to be low
during days 1 - 2 (07 - 08 May) with a chance for an isolated
M-class flare from Region 1069. Activity is expected to decrease to
very low levels on day 3 (09 May) as Region 1069 crosses the west
limb.
IIA. Geophysical Activity Summary 05-2100Z to 06-2100Z
Geomagnetic field activity was at quiet to unsettled levels. However,
a brief period of active levels was detected at Boulder around
06/0800Z. ACE solar wind measurements indicated Earth remained
within a coronal hole high-speed stream. Solar wind velocities
varied from 491 - 584 km/sec during the period. The greater than 2
MeV electron flux at geosynchronous orbit reached high levels during
the summary period.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to be at quiet to unsettled levels during days 1 - 3 (07 -
09 May). There is also a chance for active levels during days 2 - 3
(08 - 09 May) in response to recent CME activity.
III. Event Probabilities 07 May to 09 May
| Class M | 20% | 20% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 06 May 079 Predicted 07 May-09 May 078/076/075 90 Day Mean 06 May 082
V. Geomagnetic A Indices
Observed Afr/Ap 05 May 006/008 Estimated Afr/Ap 06 May 007/009 Predicted Afr/Ap 07 May-09 May 007/009-010/012-010/012
VI. Geomagnetic Activity Probabilities 07 May to 09 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 15% | 15% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 20% |
| Minor storm | 01% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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