Pc 1 Emissions in the afternoon sector prior to the July 29, 1977 sudden commencement

Journal Article · Sun Aug 01 04:00:00 EDT 1982 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JA087iA08p05895· OSTI ID:7063144

Olsen, J V

A series of three structured Pc 1 events were observed prior to the July 29, 1977, sudden commencement by magnetometer stations at College, Alaska, MacQuarie Island, Australia, and Vostok, Antarctica. Signal characteristics of the events lead us to infer that the near-conjugate College and MacQuarie Island stations were near the source field lines for the second of these events. From the growth rates for ion cyclotron waves calculated from linearized equations for an anisotropic, drifting plasma we have inferred the presence of freshly injected plasma in the afternoon magnetosphere after 2330 UT at L = 5.4. This is consistent with the increased convection to be expected with the observed southward turning of the interplanetary magnetic field prior to the sudden commencement.

• Research Organization: Geophysical Institute, University of Alaska, Fairbanks, Alaska 99701
• OSTI ID: 7063144
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 87:A8; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640203* -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EARTH ATMOSPHERE
GEOMAGNETIC CONJUGACY
GEOMAGNETIC FIELD
INSTABILITY GROWTH RATES
ION PLASMA WAVES
ION WAVES
IONOSPHERE
MAGNETIC FIELDS
MAGNETIC STORMS
MAGNETOSPHERE
PLANETARY IONOSPHERES
PLASMA DRIFT
PLASMA WAVES
PULSATIONS
WAVE PROPAGATION