Viewing archive of Tuesday, 8 May 2018
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 2018 May 08 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 128 Issued at 2200Z on 08 May 2018IA. Analysis of Solar Active Regions and Activity from 07-2100Z to 08-2100Z 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 day one (09 May) and
expected to be very low on days two and three (10 May, 11 May).
IIA. Geophysical Activity Summary 07-2100Z to 08-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 743 km/s at 08/2048Z. Total IMF reached 9
nT at 08/0358Z. The maximum southward component of Bz reached -7 nT at
08/0420Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 26784 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (09 May), quiet to unsettled
levels on day two (10 May) and quiet levels on day three (11 May).
III. Event Probabilities 09 May to 11 May
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 08 May 070 Predicted 09 May-11 May 070/070/069 90 Day Mean 08 May 070
V. Geomagnetic A Indices
Observed Afr/Ap 07 May 014/017 Estimated Afr/Ap 08 May 013/016 Predicted Afr/Ap 09 May-11 May 011/012-008/008-005/005
VI. Geomagnetic Activity Probabilities 09 May to 11 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 25% | 15% |
| Minor storm | 15% | 10% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 15% |
| Minor storm | 30% | 30% | 20% |
| Major-severe storm | 40% | 30% | 15% |
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