Substorm Expansion Phases During Magnetic Storms in April 17-23, 2002: IMAGE FUV Observations

Details Substorm Expansion Phases During Magnetic Storms in April 17-23, 2002: IMAGE FUV Observations Substorm Expansion Phases During Magnetic Storms in April 17-23, 2002: IMAGE FUV Observations

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsa21b0447z&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SA21B-0447

Physics

2704 Auroral Phenomena (2407), 2716 Energetic Particles, Precipitating, 2736 Magnetosphere/Ionosphere Interactions, 2784 Solar Wind/Magnetosphere Interactions, 2788 Storms And Substorms

Scientific paper

Three magnetic storms occurred during April 17-23, 2002 as an important SEC effect driven by several solar flares and CMEs. FUV auroral data from the IMAGE spacecraft have ~85% coverage for the double main phases of the second magnetic storm that occurred during April 19-20, and have 57% coverage for the main phase of the third magnetic storm that occurred on April 23. During the second storm, when the IMF Bz was strongly southward, north - south auroras, auroral torches and double auroral ovals occurred within substorm expansion phases. Simultaneously, observations of energetic particles at the geosynchronous altitude showed the feature of "sawtooth injections" at every substorm expansion onset. During the third storm, when the IMF Bz was mainly in a strong northward direction, the first auroral expansion onset occurred ~12 min after an intense interplanetary shock arrived at the nose of the magnetopause. There were no energetic particle injections or electrojets observed at the geosynchronous orbit or by CANOPUS magnetometers for this auroral expansion onset. FUV data showed auroral poleward expansion, but mainly within the midnight sector. There might be two substorm expansion phases that occurred at the middle and near the end of the storm main phase. Comparison studies between the two magnetic storms and between the observations from space and the ground will be performed to better understand the storm-substorm relationship. The effects of the two storms on the magnetosphere - ionosphere coupling will be studied as well.

Affiliated with

Also associated with

No associations

Rating

Substorm Expansion Phases During Magnetic Storms in April 17-23, 2002: IMAGE FUV Observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Substorm Expansion Phases During Magnetic Storms in April 17-23, 2002: IMAGE FUV Observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Substorm Expansion Phases During Magnetic Storms in April 17-23, 2002: IMAGE FUV Observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1433624