Viewing archive of Tuesday, 28 September 2004

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 2004 Sep 28 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 272 Issued at 2200Z on 28 Sep 2004

IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z

Solar Activity was very low. Only one B-class event occurred in the past 24 hours. Region 673 (S13W90+) rotated around the West limb. New Region 676 (S11E78) was numbered and appears to be a simple H type spot.
IB. Solar Activity Forecast
Solar activity is expected to be very low.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet to unsettled.
III. Event Probabilities 29 Sep to 01 Oct
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       28 Sep 090
  Predicted   29 Sep-01 Oct  095/095/100
  90 Day Mean        28 Sep 111
V. Geomagnetic A Indices
  Observed Afr/Ap 27 Sep  002/005
  Estimated     Afr/Ap 28 Sep  005/008
  Predicted    Afr/Ap 29 Sep-01 Oct  005/008-005/005-005/005
VI. Geomagnetic Activity Probabilities 29 Sep to 01 Oct
A. Middle Latitudes
Active20%20%20%
Minor storm10%10%10%
Major-severe storm05%05%05%
B. High Latitudes
Active30%30%30%
Minor storm10%10%10%
Major-severe storm05%05%05%

All times in UTC

<< Go to daily overview page

Support SpaceWeatherLive.com!

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!

74%
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/05/27X2.9
Last M-flare2024/05/29M1.2
Last geomagnetic storm2024/05/17Kp6 (G2)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
April 2024136.5 +31.6
May 2024147.3 +10.8
Last 30 days145.1 +7.8

This day in history*

Solar flares
12003X1.64
21998M9.14
32003M3.87
41999M2.37
52003M2.14
ApG
12003109G4
2193275G4
3196054G4
4197930G3
5196745G3
*since 1994

Social networks