Viewing archive of Monday, 5 September 2005

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 2005 Sep 05 2204 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 248 Issued at 2200Z on 05 Sep 2005

IA. Analysis of Solar Active Regions and Activity from 04-2100Z to 05-2100Z

Solar activity was low. A long duration C2 flare and Type IV radio sweep occurred at 05/1041Z. A large and fast CME (2000 km/s) observed off the southeast limb, was also associated with this event. The likely source of this flare was old active Region 798 (S09, L=217), which is due to rotate onto the visible disk on 07 Sep. Old Region 798 produced a proton flare during the latter stages of its last transit across the visible disk (22-24 Aug), and was responsible for a severe geomagnetic storm. Region 805 (S11W44), the only region with sunspots on the visible disk, was quiet and stable.
IB. Solar Activity Forecast
Solar activity is expected to be low on 06 Sep, but is expected to increase to at least moderate levels on 07 and 08 Sep as old active Region 798 rotates onto the visible disk.
IIA. Geophysical Activity Summary 04-2100Z to 05-2100Z
The geomagnetic field was quiet to active. Solar wind was elevated, but declined from 650 km/s to near 450 km/s by the end the period. The greater the 2 MeV electron flux at geosynchronous orbit was at high levels again today.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet to unsettled with isolated active periods. The large CME observed off the southeast limb this period is not expected to be geoeffective.
III. Event Probabilities 06 Sep to 08 Sep
Class M10%25%35%
Class X01%05%10%
Proton01%05%05%
PCAFGreen
IV. Penticton 10.7 cm Flux
  Observed       05 Sep 075
  Predicted   06 Sep-08 Sep  080/090/100
  90 Day Mean        05 Sep 092
V. Geomagnetic A Indices
  Observed Afr/Ap 04 Sep  018/026
  Estimated     Afr/Ap 05 Sep  015/015
  Predicted    Afr/Ap 06 Sep-08 Sep  010/010-005/005-005/005
VI. Geomagnetic Activity Probabilities 06 Sep to 08 Sep
A. Middle Latitudes
Active20%15%15%
Minor storm10%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active25%20%20%
Minor storm15%10%10%
Major-severe storm05%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!

23%
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/03/23X1.1
Last M-flare2024/03/28M7.0
Last geomagnetic storm2024/03/25Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
February 2024124.7 +1.7

This day in history*

Solar flares
12024M7.0
22001M6.17
32000M4.46
42022M4.0
52014M3.79
ApG
1200144G2
2200327G2
3199721G2
4201727G1
5200421G1
*since 1994

Social networks