Viewing archive of Monday, 9 April 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 Apr 09 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 99 Issued at 2200Z on 09 Apr 2018IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z 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 (10 Apr, 11 Apr, 12 Apr).
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 532 km/s at 09/1734Z. Total IMF reached 8
nT at 09/0711Z. The maximum southward component of Bz reached -6 nT at
09/0715Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 301 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on days one and two (10 Apr, 11
Apr) and unsettled to active levels on day three (12 Apr).
III. Event Probabilities 10 Apr to 12 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 09 Apr 069 Predicted 10 Apr-12 Apr 070/070/070 90 Day Mean 09 Apr 070
V. Geomagnetic A Indices
Observed Afr/Ap 08 Apr 005/004 Estimated Afr/Ap 09 Apr 009/008 Predicted Afr/Ap 10 Apr-12 Apr 015/018-014/018-011/015
VI. Geomagnetic Activity Probabilities 10 Apr to 12 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 40% | 35% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 30% | 30% | 30% |
| Major-severe storm | 55% | 55% | 50% |
All times in UTC
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