Viewing archive of Monday, 18 December 2006

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 2006 Dec 18 2204 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 352 Issued at 2200Z on 18 Dec 2006

IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z

Solar activity was at very low levels. The visible disk is void of sunspots. No new regions were numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be at very low levels.
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic field was at quiet to unsettled levels. The greater than 2 MeV electrons at geosynchronous orbit reached high levels again today.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on 19 December. A recurrent high speed coronal hole stream is expected to become geoeffective on 20 December with active to minor storm conditions likely to result and persist through the remainder of the forecast period. Brief isolated major storm periods may occur on 21 December.
III. Event Probabilities 19 Dec to 21 Dec
Class M05%01%01%
Class X01%01%01%
Proton05%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       18 Dec 075
  Predicted   19 Dec-21 Dec  075/075/075
  90 Day Mean        18 Dec 081
V. Geomagnetic A Indices
  Observed Afr/Ap 17 Dec  003/004
  Estimated     Afr/Ap 18 Dec  004/005
  Predicted    Afr/Ap 19 Dec-21 Dec  004/005-010/020-015/030
VI. Geomagnetic Activity Probabilities 19 Dec to 21 Dec
A. Middle Latitudes
Active15%20%30%
Minor storm05%10%15%
Major-severe storm01%05%05%
B. High Latitudes
Active20%40%45%
Minor storm05%15%25%
Major-severe storm01%10%20%

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-flare2024/12/22M1.1
Last geomagnetic storm2024/12/17Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
November 2024152.5 -13.9
December 2024103.3 -49.2
Last 30 days114 -43.9

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