Viewing archive of Wednesday, 20 July 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 Jul 20 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 202 Issued at 2200Z on 20 Jul 2016IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C4 event observed at
20/0317Z from Region 2567 (N05W37). There are currently 3 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be low with a
chance for M-class flares on days one and two (21 Jul, 22 Jul) and
likely to be low with a slight chance for an M-class flare on day three
(23 Jul).
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed reached a peak of 633 km/s at 20/0721Z. Total IMF
reached 34 nT at 20/0100Z. The maximum southward component of Bz reached
-28 nT at 20/0022Z. Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 3426 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and two (21 Jul, 22 Jul) and
quiet to unsettled levels on day three (23 Jul).
III. Event Probabilities 21 Jul to 23 Jul
| Class M | 25% | 25% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 20 Jul 108 Predicted 21 Jul-23 Jul 105/105/100 90 Day Mean 20 Jul 088
V. Geomagnetic A Indices
Observed Afr/Ap 19 Jul 011/007 Estimated Afr/Ap 20 Jul 018/024 Predicted Afr/Ap 21 Jul-23 Jul 013/016-010/012-010/010
VI. Geomagnetic Activity Probabilities 21 Jul to 23 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 25% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 30% | 30% | 25% |
| Major-severe storm | 30% | 30% | 25% |
All times in UTC
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