Viewing archive of Monday, 27 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 27 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 271 Issued at 2200Z on 27 Sep 2004

IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z

Solar activity was very low. Today's activity consisted of a few low level B-class flares. An 8 degree filament near N08E40 disappeared sometime in the last 24 hours.
IB. Solar Activity Forecast
Solar activity is expected to be very low.
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic field was mostly quiet. The greater than 2 MeV electrons at geosynchronous orbit reached high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet to unsettled.
III. Event Probabilities 28 Sep to 30 Sep
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       27 Sep 090
  Predicted   28 Sep-30 Sep  090/095/095
  90 Day Mean        27 Sep 111
V. Geomagnetic A Indices
  Observed Afr/Ap 26 Sep  002/004
  Estimated     Afr/Ap 27 Sep  005/005
  Predicted    Afr/Ap 28 Sep-30 Sep  005/008-005/008-005/005
VI. Geomagnetic Activity Probabilities 28 Sep to 30 Sep
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

Latest news

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!

SpaceWeatherLive Pro
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/12/08X2.2
Last M-flare2024/12/23M1.0
Last geomagnetic storm2024/12/17Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
November 2024152.5 -13.9
December 2024106.6 -45.9
Last 30 days116.1 -41.8

This day in history*

Solar flares
12015M6.75
21998M3.34
32013M2.36
42013M1.97
52001M1.69
DstG
12002-67
22000-62G2
31989-60
42014-57
51982-53G1
*since 1994

Social networks