Pi1B type magnetic pulsation as a high time resolution monitor of substorm development

Details Pi1B type magnetic pulsation as a high time resolution monitor of substorm development Pi1B type magnetic pulsation as a high time resolution monitor of substorm development

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987angeo...5..231b&link_type=abstract

Annales Geophysicae, Series A - Upper Atmosphere and Space Sciences (ISSN 0980-8752), vol. 5, Aug. 1987, p. 231-237.

Physics

9

Geomagnetic Micropulsations, Polar Substorms, Temporal Resolution, Earth Magnetosphere, International Magnetospheric Study

Scientific paper

Out of a large collection of well-documented substorms (a result of the 'International Magnetospheric Study') several substorms are selected to demonstrate the possibility of monitoring substorm development by Pi1B type magnetic pulsations. Onset times and times of maximum Pi1B intensity are compared with characteristic times (e.g., onsets, sudden changes in the wave form) derived from Pi2 type magnetic pulsations observed at high and midlatitudes (Pi2 type magnetic pulsations are traditionally used as a substorm monitor). It is found that Pi1B's and Pi2's are equally good substorm timers. The fine structure in the temporal development of the Pi1B's correlates well with Pi2 signatures and auroral activity.

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