Viewing archive of Sunday, 2 December 2001

Solar activity report

Report of Solar-Geophysical Activity 2001 Dec 02 2200 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 336 Issued at 2200Z on 02 Dec 2001

IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z

Solar activity decreased to moderate levels. Region 9714 (S09W95) produced a long-duration M1 X-ray flare at 02/1500 UTC as it crossed the west limb. A post-flare loop prominence system followed this flare. Region 9715 (N04W37) produced isolated C-class subflares. It remained the most impressive region on the disk, but showed signs of gradual decay with a modest decrease in area. However, it remained magnetically complex as a magnetic delta configuration persisted within its interior spots. Region 9718 (S06E16) showed minor growth and produced isolated subflares, one of which reached C-class. Some polarity mixing persisted in the trailer portion of this region. New Region 9725 (S11W45) emerged during the period. New Region 9726 (S15E69) rotated into view today.
IB. Solar Activity Forecast
Solar activity is expected to be mostly moderate during the period with isolated M-class flares likely. There will also be a chance for an isolated major flare during the period from Region 9715.
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
Geomagnetic field activity was at mostly quiet levels.
IIB. Geophysical Activity Forecast
Quiet to unsettled levels are expected. However, there will be a chance for active periods during 04 - 05 December due to coronal hole effects. There will be a slight chance for a proton flare from Region 9715.
III. Event Probabilities 03 Dec to 05 Dec
Class M80%80%80%
Class X10%10%10%
IV. Penticton 10.7 cm Flux
  Observed       02 Dec 245
  Predicted   03 Dec-05 Dec  245/245/245
  90 Day Mean        02 Dec 219
V. Geomagnetic A Indices
  Observed Afr/Ap 01 Dec  006/007
  Estimated     Afr/Ap 02 Dec  005/007
  Predicted    Afr/Ap 03 Dec-05 Dec  010/010-012/015-012/015
VI. Geomagnetic Activity Probabilities 03 Dec to 05 Dec
A. Middle Latitudes
Minor storm05%10%10%
Major-severe storm01%01%01%
B. High Latitudes
Minor storm10%10%10%
Major-severe storm01%01%01%

<< Go to daily overview page

Latest news


A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!


Space weather facts

Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/10/26Kp5 (G1)
Number of spotless days in 2020:16
Last spotless day:2020/01/23

This day in history*

Solar flares
*since 1994

Social networks