Other
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsm42a..05e&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SM42A-05
Other
2752 Mhd Waves And Instabilities
Scientific paper
This study presents an analysis of amplitude and bandwidth of long-period ULF wave power observed at several networks of ground magnetometer stations in the western hemisphere, at latitudes from the subauroral zone to the polar caps, during the magnetic storm intervals of September and October 1999, April and October 2000, and March-April 2001 identified by the GEM research community. The magnetometer stations in this study include the polar cap / cusp latitude arrays of MACCS and the U.S. Automated Geophysical Observatories (AGOs), and the auroral / subauroral latitude arrays of CANOPUS and the British Antarctic Survey (BAS) AGOs. Comparison of the long-period pulsations (in the Pc5 frequency range) observed on the ground to the solar wind velocity and solar wind pressure confirms previous results that high solar wind velocity correlates well with increased Pc5-band power. Each storm exhibited narrow-band Pc5 wave activity during the recovery phase, but only in the dawn-noon sector at each site. During the main phase, and at all other local times during the recovery phase, wave activity was broadband.
Engebretson Mark J.
Hughes Jeffrey W.
Posch Jennifer L.
Simms L. E.
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