Viewing archive of Sunday, 15 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 15 2305 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 74 Issued at 2200Z on 15 Mar 2015IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M1 event observed at
15/0940Z from Region 2297 (S18W36). There are currently 3 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
(16 Mar, 17 Mar, 18 Mar).
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
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
352 km/s at 15/0448Z. Total IMF reached 14 nT at 15/1727Z. The maximum
southward component of Bz reached -5 nT at 15/1426Z. Protons greater
than 10 MeV at geosynchronous orbit reached a peak level of 4 pfu at
15/0930Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (16 Mar), quiet to active
levels on day two (17 Mar) and unsettled to minor storm levels on day
three (18 Mar). Protons have a chance of crossing threshold on day one
(16 Mar), have a chance of crossing threshold on day two (17 Mar) and
have a chance of crossing threshold on day three (18 Mar).
III. Event Probabilities 16 Mar to 18 Mar
| Class M | 70% | 70% | 70% |
| Class X | 20% | 20% | 20% |
| Proton | 30% | 35% | 40% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 15 Mar 114 Predicted 16 Mar-18 Mar 115/112/110 90 Day Mean 15 Mar 139
V. Geomagnetic A Indices
Observed Afr/Ap 14 Mar 005/005 Estimated Afr/Ap 15 Mar 010/012 Predicted Afr/Ap 16 Mar-18 Mar 008/008-012/015-015/020
VI. Geomagnetic Activity Probabilities 16 Mar to 18 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 30% | 40% |
| Minor storm | 05% | 10% | 20% |
| Major-severe storm | 01% | 01% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 10% |
| Minor storm | 25% | 30% | 25% |
| Major-severe storm | 20% | 40% | 60% |
All times in UTC
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