Viewing archive of Sunday, 23 September 2007

Solar activity report

Report of Solar-Geophysical Activity 2007 Sep 23 2203 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 266 Issued at 2200Z on 23 Sep 2007

IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z

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 22-2100Z to 23-2100Z
The geomagnetic field ranged from quiet to active. Solar wind speed is elevated at approximately 650 km/s due to a geoeffective coronal hole high speed stream.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet to unsettled with possible active periods on 24 September due to the coronal hole high speed stream. Expect quiet to unsettled conditions on 25 - 26 September.
III. Event Probabilities 24 Sep to 26 Sep
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       23 Sep 066
  Predicted   24 Sep-26 Sep  067/067/067
  90 Day Mean        23 Sep 070
V. Geomagnetic A Indices
  Observed Afr/Ap 22 Sep  010/011
  Estimated     Afr/Ap 23 Sep  012/015
  Predicted    Afr/Ap 24 Sep-26 Sep  010/010-005/008-005/005
VI. Geomagnetic Activity Probabilities 24 Sep to 26 Sep
A. Middle Latitudes
Active20%10%10%
Minor storm10%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active20%15%10%
Minor storm10%05%05%
Major-severe storm01%01%01%

<< 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%

Space weather facts

Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/10/26Kp5 (G1)
Number of spotless days in 2019:244
Current stretch spotless days:18

This day in history*

Solar flares
12003M9.6
22003M5.8
31999M3.2
42012M1.7
52012M1.6
ApG
12003150G4
2200225G2
3200724G1
4199424G1
5200420
*since 1994

Social networks