Dayside Pi 2 pulsations at low altitudes

Journal Article · Tue Aug 01 04:00:00 EDT 1989 · Geophysical Research Letters (American Geophysical Union); (USA)

DOI:https://doi.org/10.1029/GL016i008p00887· OSTI ID:5837288

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

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1. Foundation for Research Development, Hermanus (South Africa)
2. Nagoya Univ., Toyokawa, Aichi (Japan)

In this paper the authors investigate the occurrence of dayside Pi 2 geomagnetic pulsations at low and mid latitudes. The technique of data adaptive filtering is used to identify Pi 2's concealed by the presence of typical daytime Pc type pulsations. Convincing new evidence is presented demonstrating that Pi 2 pulsations occur simultaneously in both the nightside and dayside hemispheres at low latitudes. Dayside Pi 2's are occasionally identified at mid latitudes. These results have implications with regard to the source mechanism for low latitude Pi 2 pulsations and allude to a global cavity mode.

• OSTI ID: 5837288
• Journal Information: Geophysical Research Letters (American Geophysical Union); (USA), Journal Name: Geophysical Research Letters (American Geophysical Union); (USA) Vol. 16:8; ISSN 0094-8276; ISSN GPRLA
• Country of Publication: United States
• Language: English

Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CURRENTS
DATA ANALYSIS
DIGITAL FILTERS
ELECTRIC CURRENTS
ELECTROJETS
EQUATOR
GEOGRAPHICAL VARIATIONS
GEOMAGNETIC FIELD
HYDROMAGNETIC WAVES
LATITUDE EFFECT
MAGNETIC BAYS
MAGNETIC FIELDS
PULSATIONS
VARIATIONS
WAVE PROPAGATION