Viewing archive of Saturday, 28 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 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 87 Issued at 2200Z on 28 Mar 2015IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z 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
28/1607Z from Region 2303 (N18W78). There are currently 5 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 (29 Mar, 30 Mar,
31 Mar).
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
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
440 km/s at 28/0650Z. Total IMF reached 14 nT at 28/1954Z. The maximum
southward component of Bz reached -8 nT at 28/0542Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 1221 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (29 Mar), quiet to
active levels on day two (30 Mar) and quiet to unsettled levels on day
three (31 Mar).
III. Event Probabilities 29 Mar to 31 Mar
| Class M | 25% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 28 Mar 146 Predicted 29 Mar-31 Mar 145/145/145 90 Day Mean 28 Mar 132
V. Geomagnetic A Indices
Observed Afr/Ap 27 Mar 007/006 Estimated Afr/Ap 28 Mar 011/013 Predicted Afr/Ap 29 Mar-31 Mar 017/022-012/015-007/010
VI. Geomagnetic Activity Probabilities 29 Mar to 31 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 30% | 20% |
| Minor storm | 25% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 25% | 30% | 30% |
| Major-severe storm | 60% | 35% | 30% |
All times in UTC
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