Viewing archive of Wednesday, 10 April 2019
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 2019 Apr 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 100 Issued at 2200Z on 10 Apr 2019IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 1 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a slight chance for a C-class flare on days one, two, and three (11
Apr, 12 Apr, 13 Apr).
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 489 km/s at 10/0234Z. Total IMF reached 8
nT at 10/0630Z. The maximum southward component of Bz reached -7 nT at
10/0151Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 3730 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and two (11 Apr, 12 Apr) and
quiet to unsettled levels on day three (13 Apr).
III. Event Probabilities 11 Apr to 13 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 10 Apr 078 Predicted 11 Apr-13 Apr 078/078/078 90 Day Mean 10 Apr 072
V. Geomagnetic A Indices
Observed Afr/Ap 09 Apr 011/010 Estimated Afr/Ap 10 Apr 014/017 Predicted Afr/Ap 11 Apr-13 Apr 013/014-010/012-007/008
VI. Geomagnetic Activity Probabilities 11 Apr to 13 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 25% | 20% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 35% | 30% | 30% |
| Major-severe storm | 40% | 35% | 25% |
All times in UTC
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