Viewing archive of Thursday, 14 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 14 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 134 Issued at 2200Z on 14 May 2015IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z 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
14/0731Z from Region 2339 (N11W45). There are currently 8 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a slight chance for an M-class flare on days one, two, and three (15
May, 16 May, 17 May).
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
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
802 km/s at 14/0105Z. Total IMF reached 5 nT at 13/2229Z. The maximum
southward component of Bz reached -4 nT at 14/2006Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 4130 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (15 May), quiet to active
levels on day two (16 May) and unsettled to minor storm levels on day
three (17 May).
III. Event Probabilities 15 May to 17 May
| Class M | 20% | 20% | 20% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 14 May 145 Predicted 15 May-17 May 140/140/135 90 Day Mean 14 May 128
V. Geomagnetic A Indices
Observed Afr/Ap 13 May 025/041 Estimated Afr/Ap 14 May 013/015 Predicted Afr/Ap 15 May-17 May 010/012-010/010-016/020
VI. Geomagnetic Activity Probabilities 15 May to 17 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 25% | 30% |
| Minor storm | 10% | 10% | 15% |
| Major-severe storm | 01% | 01% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 40% | 35% | 45% |
All times in UTC
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