Viewing archive of Wednesday, 29 November 2023

Solar activity report

Report of Solar-Geophysical Activity 2023 Nov 29 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 333 Issued at 2200Z on 29 Nov 2023

IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z

Solar activity has been at low levels for the past 24 hours. The largest solar event of the period was a C8 event observed at 28/2331Z from Region 3499 (S17W59). There are currently 12 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with a chance for M-class flares and a slight chance for an X-class flare on days one, two, and three (30 Nov, 01 Dec, 02 Dec).
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 454 km/s at 29/0041Z. Total IMF reached 5 nT at 28/2108Z. The maximum southward component of Bz reached -3 nT at 29/1122Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 392 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at unsettled to minor storm levels on day one (30 Nov), unsettled to severe storm levels on day two (01 Dec) and quiet to minor storm levels on day three (02 Dec). Protons have a slight chance of crossing threshold on days one and two (30 Nov, 01 Dec) and have a slight chance of crossing threshold on day three (02 Dec).
III. Event Probabilities 30 Nov to 02 Dec
Class M40%40%40%
Class X10%10%10%
Proton15%15%20%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       29 Nov 171
  Predicted   30 Nov-02 Dec 175/170/165
  90 Day Mean        29 Nov 150

V. Geomagnetic A Indices
  Observed Afr/Ap 28 Nov  006/006
  Estimated     Afr/Ap 29 Nov  007/010
  Predicted    Afr/Ap 30 Nov-02 Dec  020/030-037/054-018/022

VI. Geomagnetic Activity Probabilities 30 Nov to 02 Dec
A. Middle Latitudes
Active35%20%35%
Minor storm25%35%25%
Major-severe storm05%40%05%
B. High Latitudes
Active10%10%15%
Minor storm20%20%20%
Major-severe storm45%60%20%

All times in UTC

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

Gillam, MB, Yellowknife, NT
A transequatorial coronal hole was detected in an earth-facing position on Monday, 24 March 2025

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Monday, 24 March 2025
Coronal hole faces Earth

The anticipated strong G3 geomagnetic storm watch never materialized as the coronal mass ejection that was supposed to arrive early yesterday didn't arrive until today just past midnight UTC. The impact was very lackluster with the Bt (total strength of the IMF) increasing to a moderate 15nT at best and the solar wind speed reaching just 420km/s. A far cry from the anticipated 700 to 800km/s. That once again goes to show how hard it is to forecast space weather events and any resulting geomagnetic conditions. We remain under the influence of the CME and high latitude sky watchers should remain alert for some nice aurora displays but middle latitude sky watchers will probably have to wait for the next opportunity. 

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