Viewing archive of Friday, 20 May 2005

Solar activity report

Report of Solar-Geophysical Activity 2005 May 20 2210 UTC
# Prepared jointly by the U.S. Dept. of Commerce, NOAA, #Space Environment Center and the U.S. Air Force. #

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 140 Issued at 2200Z on 20 May 2005

IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z

Solar activity was at very low levels. Region 759 (N12W88) is transiting the solar west limb and quiescent throughout the period. Region 765 (N09E51) was responsible for several low level B-class flares today. Magnetically, this region remains simply structured. No new regions were numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be at very low levels with a slight chance for an isolated C-class flare.
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
The geomagnetic field ranged from quiet to major storming levels today. The most likely source for the major storming conditions was the full halo CME seen early on 17 May. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels.
IIB. Geophysical Activity Forecast
The geomagnetic field should be at quiet to unsettled levels throughout the period.
III. Event Probabilities 21 May to 23 May
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       20 May 084
  Predicted   21 May-23 May  080/085/090
  90 Day Mean        20 May 091
V. Geomagnetic A Indices
  Observed Afr/Ap 19 May  007/011
  Estimated     Afr/Ap 20 May  020/025
  Predicted    Afr/Ap 21 May-23 May  006/010-006/008-004/008
VI. Geomagnetic Activity Probabilities 21 May to 23 May
A. Middle Latitudes
Active15%15%15%
Minor storm05%05%01%
Major-severe storm01%01%01%
B. High Latitudes
Active20%15%15%
Minor storm05%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%

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/09/28Kp5 (G1)
Number of spotless days in 2019:213
Current stretch spotless days:16

This day in history*

Solar flares
11998M2.4
22014M1.6
32001C8.5
42013C8.4
52014C6.7
ApG
1199532G3
2199627G1
3200325G1
4201519G1
5201415
*since 1994

Social networks