Bad Space Weather Ahead (Update)

NOAA SEC Space Weather Bulletin #11- 1: Geomagnetic Storm Expected

"NOAA Region 1261, very active over the past few days, produced the third of a sequence of Coronal Mass Ejections (CMEs) and Solar Radio Blackout Events early today. The net effect of that activity is convergent CMEs expected to disturb the geomagnetic field in the early hours, Universal Time (UTC) of August 5. G3 (Strong) Geomagnetic Storm conditions are likely as well as a distinct chance of S2 (Moderate) Solar Radiation Storm levels being surpassed. NOAA 1261 is still in a prime position, relative to Earth, for more geoeffective activity in the next few days."

Space Weather Message Code: WARK07 WARNING: Geomagnetic K-index of 7 or greater (G3 or greater)

"WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2011 Aug 05 2200 UTC
Valid To: 2011 Aug 06 0300 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater - Strong to Extreme"

Joint USAF/NOAA Report of Solar and Geophysical Activity 5 August 2011

"IIB. Geophysical Activity Forecast: The geomagnetic field is expected to reach minor to major storm levels with a chance for severe storm periods on 06 August. Heightened activity is expected due to continued effects from the CMEs of 02, 03, and 04 August. Activity is expected to decrease to unsettled to active levels on 07 August. Quiet to unsettled conditions are expected on 08 August."

Marc's Note: Follow SpaceRef's SpaceWeather Twitter account for updates (

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This page contains a single entry by Keith Cowing published on August 5, 2011 6:24 PM.

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