Infrasonic waves from auroral arcs

Details Infrasonic waves from auroral arcs Infrasonic waves from auroral arcs

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.3573c&link_type=abstract

Journal of Geophysical Research, vol. 82, Sept. 1, 1977, p. 3573-3576.

Computer Science

Sound

Auroral Arcs, Bow Waves, Infrasonic Frequencies, Sound Waves, Traveling Ionospheric Disturbances, Ionospheric Currents, Pressure Distribution, Signature Analysis

Scientific paper

The infrasonic bow wave from a traveling auroral arc of finite length is calculated, and the results of the infinite length approximation are essentially recovered. The finite length results in a distinct, separate, second trailing pulse that is weaker than, and of the opposite sign from, the main pressure wave. It is shown that the sign-reversed signatures sometimes observed may be due to arc currents that have strongly defined trailing ends and relatively diffuse frontal structures.

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