Viewing archive of Sunday, 10 May 2015
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 2015 May 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 130 Issued at 2200Z on 10 May 2015IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C2 event observed at
10/1711Z from Region 2339 (N13E08). There are currently 8 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (11 May, 12 May,
13 May).
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
430 km/s at 10/0830Z. Total IMF reached 14 nT at 10/1749Z. The maximum
southward component of Bz reached -10 nT at 10/2000Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (11 May) and unsettled to
minor storm levels on days two and three (12 May, 13 May).
III. Event Probabilities 11 May to 13 May
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 10 May 160 Predicted 11 May-13 May 160/165/160 90 Day Mean 10 May 127
V. Geomagnetic A Indices
Observed Afr/Ap 09 May 008/007 Estimated Afr/Ap 10 May 009/010 Predicted Afr/Ap 11 May-13 May 009/012-017/025-019/025
VI. Geomagnetic Activity Probabilities 11 May to 13 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 40% | 40% |
| Minor storm | 15% | 25% | 25% |
| Major-severe storm | 01% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 30% | 25% | 25% |
| Major-severe storm | 45% | 60% | 60% |
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