Viewing archive of Saturday, 25 December 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 Dec 25 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 360 Issued at 2200Z on 25 Dec 2004

IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z

Solar activity was very low. Region 713 (S09W36) has decreased in both area and spot number.
IB. Solar Activity Forecast
Solar activity is expected to be very low with a chance for C-class activity from Region 713.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field was quiet to active with an isolated period of minor storming from 0300Z to 0600Z on 25 December. Active conditions due to the onset of a geoeffective coronal hole high speed stream.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet to active with isolated minor storm periods possible at high latitudes.
III. Event Probabilities 26 Dec to 28 Dec
Class M05%05%05%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       25 Dec 093
  Predicted   26 Dec-28 Dec  095/095/095
  90 Day Mean        25 Dec 104
V. Geomagnetic A Indices
  Observed Afr/Ap 24 Dec  002/004
  Estimated     Afr/Ap 25 Dec  010/015
  Predicted    Afr/Ap 26 Dec-28 Dec  015/018-015/012-010/010
VI. Geomagnetic Activity Probabilities 26 Dec to 28 Dec
A. Middle Latitudes
Active25%25%20%
Minor storm15%15%10%
Major-severe storm05%05%01%
B. High Latitudes
Active30%30%25%
Minor storm15%15%15%
Major-severe storm10%10%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-flare2024/05/29X1.4
Last M-flare2024/05/29M5.6
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 days147.3 +9.1

This day in history*

Solar flares
12002M2.31
22002M1.98
32023M1.4
42023M1.3
51999M1.25
ApG
1193266G4
2200590G4
3200359G3
4194936G3
5196742G2
*since 1994

Social networks