Viewing archive of Monday, 27 July 2020
Solar activity report
Report of Solar-Geophysical Activity 2020 Jul 27 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 209 Issued at 2200Z on 27 Jul 2020IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z 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
on days one, two, and three (28 Jul, 29 Jul, 30 Jul).
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 431 km/s at 27/1211Z. Total IMF reached 6 nT at
27/1810Z. The maximum southward component of Bz reached -3 nT at
27/0448Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 423 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and two (28 Jul, 29 Jul)
and quiet levels on day three (30 Jul).
III. Event Probabilities 28 Jul to 30 Jul
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Jul 071 Predicted 28 Jul-30 Jul 070/070/070 90 Day Mean 27 Jul 069
V. Geomagnetic A Indices
Observed Afr/Ap 26 Jul 003/002 Estimated Afr/Ap 27 Jul 005/005 Predicted Afr/Ap 28 Jul-30 Jul 007/008-007/008-005/005
VI. Geomagnetic Activity Probabilities 28 Jul to 30 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 25% | 25% | 20% |
| Major-severe storm | 20% | 20% | 10% |
All times in UTC
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