Viewing archive of Friday, 13 March 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 Mar 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 72 Issued at 2200Z on 13 Mar 2015IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M2 event observed at
12/2151Z from Region 2297 (S16E00). There are currently 5 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(14 Mar, 15 Mar, 16 Mar).
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
478 km/s at 13/1248Z. Total IMF reached 8 nT at 13/1824Z. The maximum
southward component of Bz reached -7 nT at 13/1125Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 144 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (14 Mar), unsettled
to active levels on day two (15 Mar) and quiet to unsettled levels on
day three (16 Mar). Protons have a slight chance of crossing threshold
on days one, two, and three (14 Mar, 15 Mar, 16 Mar).
III. Event Probabilities 14 Mar to 16 Mar
| Class M | 70% | 70% | 70% |
| Class X | 20% | 20% | 20% |
| Proton | 20% | 20% | 20% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 13 Mar 119 Predicted 14 Mar-16 Mar 120/120/120 90 Day Mean 13 Mar 140
V. Geomagnetic A Indices
Observed Afr/Ap 12 Mar 006/007 Estimated Afr/Ap 13 Mar 008/012 Predicted Afr/Ap 14 Mar-16 Mar 015/020-012/015-007/010
VI. Geomagnetic Activity Probabilities 14 Mar to 16 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 35% | 25% |
| Minor storm | 25% | 10% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 25% | 30% | 30% |
| Major-severe storm | 60% | 45% | 30% |
All times in UTC
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