Viewing archive of Sunday, 18 June 2017
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 2017 Jun 18 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 169 Issued at 2200Z on 18 Jun 2017IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z 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 very low
with a slight chance for a C-class flare on days one, two, and three (19
Jun, 20 Jun, 21 Jun).
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 640 km/s at 18/0815Z. Total IMF reached 7
nT at 18/0218Z. The maximum southward component of Bz reached -6 nT at
18/0129Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 808 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (19 Jun) and quiet levels
on days two and three (20 Jun, 21 Jun).
III. Event Probabilities 19 Jun to 21 Jun
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 18 Jun 075 Predicted 19 Jun-21 Jun 075/075/074 90 Day Mean 18 Jun 077
V. Geomagnetic A Indices
Observed Afr/Ap 17 Jun 012/017 Estimated Afr/Ap 18 Jun 010/012 Predicted Afr/Ap 19 Jun-21 Jun 010/010-005/005-005/005
VI. Geomagnetic Activity Probabilities 19 Jun to 21 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 05% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 15% |
| Major-severe storm | 20% | 15% | 10% |
All times in UTC
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