Viewing archive of Monday, 24 September 2007

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 2007 Sep 24 2203 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 267 Issued at 2200Z on 24 Sep 2007

IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z

Solar activity was very low. The visible solar disk remains spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very low.
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The geomagnetic field ranged from quiet to active with a period of minor storming observed at middle latitudes. An elevated solar wind speed due to a coronal hole high speed stream contributed to the activity. Solar wind speed remains elevated at approximately 620 km/s at the time of issue. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet to unsettled with a chance for active periods on 25 September due to the ongoing coronal hole high speed stream. Expect quiet to unsettled conditions on 26 - 27 September.
III. Event Probabilities 25 Sep to 27 Sep
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       24 Sep 066
  Predicted   25 Sep-27 Sep  066/066/067
  90 Day Mean        24 Sep 070
V. Geomagnetic A Indices
  Observed Afr/Ap 23 Sep  011/015
  Estimated     Afr/Ap 24 Sep  009/010
  Predicted    Afr/Ap 25 Sep-27 Sep  007/008-005/005-005/008
VI. Geomagnetic Activity Probabilities 25 Sep to 27 Sep
A. Middle Latitudes
Active15%10%10%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active20%10%15%
Minor storm05%05%05%
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-flare2024/11/10M9.3
Last geomagnetic storm2024/11/09Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
October 2024166.4 +25
November 2024186 +19.6
Last 30 days163.1 +14.2

This day in history*

Solar flares
12004X3.67
22013X1.62
32024M9.3
42024M4.2
52002M3.47
DstG
12004-263G4
21991-144
32000-95G2
41998-93
51975-67G2
*since 1994

Social networks