CME IMPACT SPARKS STRONG GEOMAGNETIC STORM: A cannibal CME, described below, hit Earth's magnetic field on Nov. 3rd at approximately 20:00 UT. Solar wind data from the DSCOVR spacecraft show a stairstep structure indicative of two or more CMEs pressed together. A strong G3-class geomagnetic storm is underway now. Aurora alerts: SMS Text.
Solar CME IMPACT SPARKS STRONG GEOMAGNETIC STORM 3 Nov 21
- Thread starter Pinecone
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CME IMPACT SPARKS STRONG GEOMAGNETIC STORM: A cannibal CME, described below, hit Earth's magnetic field on Nov. 3rd at approximately 20:00 UT. Solar wind data from the DSCOVR spacecraft show a stairstep structure indicative of two or more CMEs pressed together. A strong G3-class geomagnetic storm is underway now. Aurora alerts: SMS Text.
Tom McDowell
BAMN
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Heliobas Disciple
TB Fanatic
A CANNIBAL CME
Nov. 2, 2021: The CME heading for Earth is a cannibal. SOHO coronagraphs caught the storm cloud leaving the sun on Nov. 2nd following a slow-motion solar flare (M1.7) in the magnetic canopy of suns…
spaceweatherarchive.com
A CANNIBAL CME
November 4, 2021 / Dr.Tony Phillips
Nov. 2, 2021: The CME heading for Earth is a cannibal. SOHO coronagraphs caught the storm cloud leaving the sun on Nov. 2nd following a slow-motion solar flare (M1.7) in the magnetic canopy of sunspot AR2891:
This CME is a cannibal because it ate others of its own kind. Cannibal CMEs are fast coronal mass ejections that sweep up slower CMEs in front of them. The mish-mash contains tangled magnetic fields and compressed plasmas that can do a good job sparking geomagnetic storms.
The slower CMEs, in this case, were hurled into space on Nov. 1st and 2nd by departing sunspot AR2887. The cannibal caught up with them almost immediately after leaving the sun. This NOAA computer model shows what happened:
The cannibal cloud swept up one whole CME and a portion of another. If NOAA’s model is correct, the combined CME will make first contact with our planet around 0600 UT on Nov. 4th. The model also predicts a +250 km/s increase in solar wind speed and a 6-fold jump in solar wind density in the CME’s wake. These conditions, if they materialize, would set the stage for geomagnetic storms as strong as category G2.
Tom McDowell
BAMN
Strongest storm since 2017.
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jed turtle
a brother in the Lord
Haven’t had my coffee yet. Does 20:00 UT time translate into five hours later or earlier Eastern Standard Time, and when do we change the clocks. in other words, when does it arrive here on the east coast time?
