NOAA SEC Space Weather Advisory Bulletin #10- 1: Strong Geomagnetic Storm in Progress

Official Space Weather Advisory issued by NOAA Space Weather Prediction Center
Boulder, Colorado, USA

SPACE WEATHER ADVISORY BULLETIN #10- 1
2010 April 05 at 12:13 p.m. MST (2010 April 05 1213 UTC)

**** STRONG GEOMAGNETIC STORM IN PROGRESS ****

A geomagnetic storm began at 05:55 AM EST Monday, April 5, 2010. Space weather storm levels reached Strong (G3) levels on the Geomagnetic Storms Space Weather Scale. The source of the storming is an Earth-directed Coronal Mass Ejection associated with a weak solar flare that occurred in Active Region 1059 on April 3 at 05:54 AM EST. This is expected to be an isolated storm that should subside quickly. Other than the flare and CME erupting on April 3, this active region has not produced any significant activity. Systems that can be affected include electric power systems, spacecraft operations, high-frequency communications, GPS, and other navigation systems.

Data used to provide space weather services are contributed by NOAA, USAF, NASA, NSF, USGS, the International Space Environment Services and other observatories, universities, and institutions. More information is available at SWPC’s Web site http://swpc.noaa.gov

ALERT: Electron 2 MeV Integral Flux exceeded 1,000 pfu

Space Weather Message Code: ALTEF3
Serial Number: 1651
Issue Time: 2010 Apr 05 0949 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2010 Apr 05 0915 UTC
Station: GOES-11

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/NOAAscales

ALERT: Geomagnetic K-index of 7

Space Weather Message Code: ALTK07
Serial Number: 81
Issue Time: 2010 Apr 05 0956 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2010 Apr 05 0955 UTC
Synoptic Period: 0900-1200 UTC
Station: Boulder
Active Warning: No
NOAA Scale: G3 – Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/NOAAscales