Viewing archive of Saturday, 17 December 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 Dec 17 2203 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 351 Issued at 2200Z on 17 Dec 2005

IA. Analysis of Solar Active Regions and Activity from 16-2100Z to 17-2100Z

Solar activity was at low levels again today. Region 836 (S10W91) produced a C1 x-ray flare at 16/2103Z, as this region began to rotate off the west limb. An associated CME was seen in LASCO imagery that appears to have a westward component, not expecting any geoeffective conditions. Region 834 (S07W32) has shown growth during the period and has developed into a beta-gamma magnetic sunspot classification. Region 837 (S10E22) is a newly numbered four spot, Dso beta group.
IB. Solar Activity Forecast
Solar activity is expected to be at very low to low levels. Region 834 has the potential to produced C-class flares.
IIA. Geophysical Activity Summary 16-2100Z to 17-2100Z
The geomagnetic field was at quiet top unsettled levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels throughout the period.
III. Event Probabilities 18 Dec to 20 Dec
Class M10%15%15%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       17 Dec 085
  Predicted   18 Dec-20 Dec  085/085/085
  90 Day Mean        17 Dec 083
V. Geomagnetic A Indices
  Observed Afr/Ap 16 Dec  003/005
  Estimated     Afr/Ap 17 Dec  005/005
  Predicted    Afr/Ap 18 Dec-20 Dec  004/008-004/005-004/008
VI. Geomagnetic Activity Probabilities 18 Dec to 20 Dec
A. Middle Latitudes
Active15%15%15%
Minor storm01%01%01%
Major-severe storm01%01%01%
B. High Latitudes
Active20%15%20%
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!

SpaceWeatherLive Pro
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/12/08X2.2
Last M-flare2024/12/23M1.0
Last geomagnetic storm2024/12/17Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
November 2024152.5 -13.9
December 2024106.6 -45.9
Last 30 days116.1 -41.8

This day in history*

Solar flares
12015M6.75
21998M3.34
32013M2.36
42013M1.97
52001M1.69
DstG
12002-67
22000-62G2
31989-60
42014-57
51982-53G1
*since 1994

Social networks