Viewing archive of Saturday, 17 March 2018
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 2018 Mar 17 2230 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 75 Issued at 2200Z on 17 Mar 2018IA. Analysis of Solar Active Regions and Activity from 15-2100Z to 16-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 0 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
on days one, two, and three (18 Mar, 19 Mar, 20 Mar).
IIA. Geophysical Activity Summary 16-2100Z to 17-2100Z
The geomagnetic
field has been at unsettled to active levels for the past 24 hours.
Solar wind speed reached a peak of 537 km/s at 15/2208Z. Total IMF
reached 13 nT at 16/1755Z. The maximum southward component of Bz reached
-9 nT at 16/1606Z. Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 13732 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and two (17 Mar, 18 Mar) and
quiet to unsettled levels on day three (19 Mar).
III. Event Probabilities 18 Mar to 20 Mar
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 17 Mar 069 Predicted 18 Mar-20 Mar 069/069/069 90 Day Mean 17 Mar 071
V. Geomagnetic A Indices
Observed Afr/Ap 16 Mar 013/015 Estimated Afr/Ap 17 Mar 013/011 Predicted Afr/Ap 18 Mar-20 Mar 013/015-013/015-008/010
VI. Geomagnetic Activity Probabilities 17 Mar to 19 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 20% |
| Minor storm | 15% | 15% | 05% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 20% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 35% | 35% | 20% |
All times in UTC
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