NASA's Many Views of a Massive CME
On July 23, 2012, a massive cloud of solar material erupted off the sun's right side, zooming out into space. It soon passed one of NASA's Solar Terrestrial Relations Observatory, or STEREO, spacecraft, which clocked the CME as traveling between 1,800 and 2,200 miles per second as it left the sun. This was the fastest CME ever observed by STEREO.
Two other observatories – NASA's Solar Dynamics Observatory and the joint European Space Agency/NASA Solar and Heliospheric Observatory — witnessed the eruption as well. The July 2012 CME didn't move toward Earth, but watching an unusually strong CME like this gives scientists an opportunity to observe how these events originate and travel through space.
STEREO's unique viewpoint from the sides of the sun combined with the other two observatories watching from closer to Earth helped scientists create models of the entire July 2012 event. They learned that an earlier, smaller CME helped clear the path for the larger event, thus contributing to its unusual speed.
Such data helps advance our understanding of what causes CMEs and improves modeling of similar CMEs that could be Earth-directed.
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NASA's Goddard Space Flight Center. However, individual items should be credited as indicated above.
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NASA's Heliophysics Fleet Watches the July 2012 CME
Thursday, September 11, 2014 at 4:00AM
Produced by - Robert Crippen
Datasets used in this visualization
SOHO LASCO/C2 (C2)ID: 160Collected with Large Angle Spectrometric COronagraph (LASCO) NASA and ESA
SOHO LASCO/C3 (C3)ID: 161Collected with Large Angle Spectrometric COronagraph (LASCO) NASA and ESA
STEREO-AID: 187Collected with Coronograph 2 (COR2)
STEREO-AID: 188Collected with Heliospheric Imager 1 (HI-1)
STEREO 304 AngstromsID: 624Collected with Extreme UltraViolet Imager (EUVI)
SDO AIA 304 (304 Filter)ID: 677Collected with AIA JOINT SCIENCE OPERATIONS CENTER
SDO AIA 211 (211 Filter)ID: 678Collected with AIA JOINT SCIENCE OPERATIONS CENTER
SDO AIA 171 (171 Filter)ID: 680Collected with AIA JOINT SCIENCE OPERATIONS CENTER
SDO AIA 131 (131 Filter)ID: 730Collected with AIA JOINT SCIENCE OPERATIONS CENTER
STEREO-B EUVI (304 Angstroms)ID: 833Observed Data Collected with Extreme UltraViolet Imager
STEREO-B COR2ID: 834Observed Data Collected with Coronograph 2
Note: While we identify the data sets used in these visualizations, we do not store any further details, nor the data sets themselves on our site.