Viewing archive of Tuesday, 19 April 2016
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 2016 Apr 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 110 Issued at 2200Z on 19 Apr 2016IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 2 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a slight chance for an M-class flare on day one (20 Apr) and expected to
be very low with a chance for a C-class flares and a slight chance for
an M-class flare on day two (21 Apr) and expected to be very low with a
slight chance for a C-class flare on day three (22 Apr).
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 426 km/s at 18/2350Z. Total IMF reached 6 nT at
19/2024Z. The maximum southward component of Bz reached -4 nT at
19/0141Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 376 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (20 Apr) and quiet levels
on days two and three (21 Apr, 22 Apr). Protons greater than 10 Mev have
a slight chance of crossing threshold on day one (20 Apr).
III. Event Probabilities 20 Apr to 22 Apr
| Class M | 15% | 10% | 01% |
| Class X | 05% | 01% | 01% |
| Proton | 15% | 05% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 19 Apr 089 Predicted 20 Apr-22 Apr 085/085/085 90 Day Mean 19 Apr 099
V. Geomagnetic A Indices
Observed Afr/Ap 18 Apr 007/006 Estimated Afr/Ap 19 Apr 004/004 Predicted Afr/Ap 20 Apr-22 Apr 008/008-006/005-006/005
VI. Geomagnetic Activity Probabilities 20 Apr to 22 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 25% | 20% | 20% |
All times in UTC
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