A joint Cluster and ground-based instruments study of two magnetospheric substorm events on 1 September 2002

Details A joint Cluster and ground-based instruments study of two magnetospheric substorm events on 1 September 2002 A joint Cluster and ground-based instruments study of two magnetospheric substorm events on 1 September 2002

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004angeo..22.4217d&link_type=abstract

Annales Geophysicae, vol. 22, Issue 12, pp.4217-4228

Physics

1

Scientific paper

We present a coordinated ground- and space-based multi-instrument study of two magnetospheric substorm events that occurred on 1 September 2002, during the interval from 18:00 UT to 24:00 UT. Data from the Cluster and Polar spacecraft are considered in combination with ground-based magnetometer and HF radar data. During the first substorm event the Cluster spacecraft, which were in the Northern Hemisphere lobe, are to the west of the main region affected by the expansion phase. Nevertheless, substorm signatures are seen by Cluster at 18:25 UT (just after the expansion phase onset as seen on the ground at 18:23 UT), despite the ~5 RE} distance of the spacecraft from the plasma sheet. The Cluster spacecraft then encounter an earthward-moving diamagnetic cavity at 19:10 UT, having just entered the plasma sheet boundary layer. The second substorm expansion phase is preceded by pseudobreakups at 22:40 and 22:56 UT, at which time thinning of the near-Earth, L=6.6, plasma sheet occurs. The expansion phase onset at 23:05 UT is seen simultaneously in the ground magnetic field, in the magnetotail and at Polar's near-Earth position. The response in the ionospheric flows occurs one minute later. The second substorm better fits the near-Earth neutral line model for substorm onset than the cross-field current instability model.

Affiliated with

Also associated with

No associations

Rating

A joint Cluster and ground-based instruments study of two magnetospheric substorm events on 1 September 2002 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 A joint Cluster and ground-based instruments study of two magnetospheric substorm events on 1 September 2002, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A joint Cluster and ground-based instruments study of two magnetospheric substorm events on 1 September 2002 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1471580