Viewing archive of Tuesday, 25 July 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 Jul 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 206 Issued at 2200Z on 25 Jul 2017IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z 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 (26 Jul, 27 Jul, 28 Jul).
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 705 km/s at 24/2219Z. Total IMF reached 8
nT at 25/1954Z. The maximum southward component of Bz reached -4 nT at
25/1031Z. Protons greater than 10 MeV at geosynchronous orbit reached a
peak level of 2 pfu at 25/1930Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 18832 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (26 Jul) and quiet levels
on days two and three (27 Jul, 28 Jul).
III. Event Probabilities 26 Jul to 28 Jul
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Jul 070 Predicted 26 Jul-28 Jul 070/070/071 90 Day Mean 25 Jul 076
V. Geomagnetic A Indices
Observed Afr/Ap 24 Jul 013/011 Estimated Afr/Ap 25 Jul 007/007 Predicted Afr/Ap 26 Jul-28 Jul 008/008-006/005-006/005
VI. Geomagnetic Activity Probabilities 26 Jul to 28 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 20% | 20% |
| Major-severe storm | 15% | 10% | 10% |
All times in UTC
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