Viewing archive of Saturday, 17 May 2008

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 2008 May 17 2203 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 138 Issued at 2200Z on 17 May 2008

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

Solar activity was very low.
IB. Solar Activity Forecast
Solar activity is expected to remain very low.
IIA. Geophysical Activity Summary 16-2100Z to 17-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet on the first day of the forecast period (18 May), becoming unsettled to active on day two as a recurrent coronal hole high speed stream becomes geoeffective. Conditions on day three will continue to be unsettled to active, with a chance for minor storms at high latitudes.
III. Event Probabilities 18 May to 20 May
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFGreen
IV. Penticton 10.7 cm Flux
  Observed       17 May 071
  Predicted   18 May-20 May  072/072/072
  90 Day Mean        17 May 071
V. Geomagnetic A Indices
  Observed Afr/Ap 16 May  003/004
  Estimated     Afr/Ap 17 May  005/005
  Predicted    Afr/Ap 18 May-20 May  005/005-010/012-015/030
VI. Geomagnetic Activity Probabilities 18 May to 20 May
A. Middle Latitudes
Active10%20%30%
Minor storm05%10%15%
Major-severe storm01%01%05%
B. High Latitudes
Active10%25%45%
Minor storm05%15%25%
Major-severe storm01%01%10%

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-flare2024/12/23M8.9
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 days114.4 -44.3

This day in history*

Solar flares
12024M8.9
22015M6.75
31998M3.34
42013M2.36
52013M1.97
DstG
12002-67
22000-62G2
31989-60
42014-57
51982-53G1
*since 1994

Social networks