Viewing archive of Tuesday, 1 August 2023

Solar activity report

Report of Solar-Geophysical Activity 2023 Aug 01 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 213 Issued at 2200Z on 01 Aug 2023

IA. Analysis of Solar Active Regions and Activity from 31-2100Z to 01-2100Z

Solar activity has been at high levels for the past 24 hours. The largest solar event of the period was a M3 event observed at 01/0657Z from Region 3380 (S10W55). There are currently 10 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate with a slight chance for an X-class flare on days one and two (02 Aug, 03 Aug) and expected to be low with a chance for M-class flares on day three (04 Aug).
IIA. Geophysical Activity Summary 31-2100Z to 01-2100Z
The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 496 km/s at 31/2128Z. Total IMF reached 12 nT at 01/1726Z. The maximum southward component of Bz reached -5 nT at 01/1614Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 2013 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to minor storm levels on day one (02 Aug), quiet to unsettled levels on day two (03 Aug) and quiet levels on day three (04 Aug). Protons greater than 10 Mev have a slight chance of crossing threshold on days one and two (02 Aug, 03 Aug).
III. Event Probabilities 02 Aug to 04 Aug
Class M55%55%50%
Class X10%10%05%
Proton10%10%05%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       01 Aug 175
  Predicted   02 Aug-04 Aug 175/170/165
  90 Day Mean        01 Aug 165

V. Geomagnetic A Indices
  Observed Afr/Ap 31 Jul  008/008
  Estimated     Afr/Ap 01 Aug  011/015
  Predicted    Afr/Ap 02 Aug-04 Aug  014/018-009/010-006/005

VI. Geomagnetic Activity Probabilities 02 Aug to 04 Aug
A. Middle Latitudes
Active35%20%10%
Minor storm25%05%01%
Major-severe storm05%01%01%
B. High Latitudes
Active15%15%15%
Minor storm25%20%15%
Major-severe storm45%20%10%

All times in UTC

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Active geomagnetic conditions

Observed Kp: 4
Threshold reached: 01:33 UTC

Current data suggests there is a moderate possibility for aurora to appear at the following high latitude regions in the near future

Gillam, MB

Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future

Iqaluit, NU
Nuuk
Reykjavik
The strength of the interplanetary magnetic field is moderate (10.57nT), the direction is slightly South (-6.8nT).

S1 - Minor solar radiation storm

Minor impacts on HF radio through polar regions

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