On the cavity mode nature of low-latitude Pi 2 pulsations

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/90JA02007· OSTI ID:5188417

Sutcliffe, P R ^[1]; Yumoto, Kiyohumi ^[2]

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1. CSIR, Hermanus (South Africa)
2. Nagoya Univ., Aichi (Japan)

In this paper, confirmatory and new observational evidence is presented in an attempt to clarify the source mechanism of low-latitude Pi 2 pulsations. The authors commence by extending the recent investigation on the occurrence of dayside Pi 2 pulsations at low and mid latitudes. Using the technique of data adaptive filtering further evidence is presented to confirm that the pulsations occur almost simultaneously in both the nightside and dayside hemispheres at low latitudes. They then demonstrate that the spectra of the dayside and nightside pulsations are similar. The spectra of Pi 2 pulsations are furthermore compared with those of Pc 3 pulsations and shown to be different in a number of respects. They believe that these various observed characteristics are a consequence of the cavity mode nature of low-latitude Pi 2 pulsations.

• OSTI ID: 5188417
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 96:A2; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

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