Viewing archive of Sunday, 25 October 2009

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 2009 Oct 25 2201 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 298 Issued at 2200Z on 25 Oct 2009

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

Solar activity was low. Region 1029 (N14W12) produced several B-class events and a C1.5 flare at 25/0226Z. Region 1028 (N24W10) continues to decay.
IB. Solar Activity Forecast
Solar activity is expected to be low with a slight chance of an M-class flare.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
Geomagnetic field activity was quiet to unsettled.
IIB. Geophysical Activity Forecast
Geomagnetic activity is expected to be quiet through the forecast period (26-28 October) due to the coronal hole high speed stream rotating out of a geoeffective position.
III. Event Probabilities 26 Oct to 28 Oct
Class M05%05%05%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       25 Oct 076
  Predicted   26 Oct-28 Oct  075/075/075
  90 Day Mean        25 Oct 069
V. Geomagnetic A Indices
  Observed Afr/Ap 24 Oct  005/008
  Estimated     Afr/Ap 25 Oct  008/010
  Predicted    Afr/Ap 26 Oct-28 Oct  005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 26 Oct to 28 Oct
A. Middle Latitudes
Active05%05%05%
Minor storm01%01%01%
Major-severe storm01%01%01%
B. High Latitudes
Active10%10%05%
Minor storm01%01%01%
Major-severe storm01%01%01%

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!

100%
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/11/06X2.39
Last M-flare2024/11/13M1.0
Last geomagnetic storm2024/11/10Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
October 2024166.4 +25
November 2024170.8 +4.3
Last 30 days164.5 +20

This day in history*

Solar flares
12012M8.59
22012M4.14
32005M3.59
42012M3.56
52003M2.36
DstG
11960-339G5
21998-131G2
31989-121G1
41999-106G2
51979-92G1
*since 1994

Social networks