Explorer 45 wave observations during the large magnetic storm of August 4--5, 1972

Journal Article · Sat Jan 01 04:00:00 EST 1977 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JA082i001p00055· OSTI ID:7130597

Taylor, W W; Anderson, R R

The magnetospheric compression associated with the very large magnetic storm of August 4-5, 1972, provided an opportunity for Explorer 45 to observe plasma waves in the magnetosphere and the magnetosheath during extremely disturbed conditions. Electrostatic noise bursts were observed near the plasmapause in electric field channels from 35 Hz to 5.62 kHz. In the outer magnetosphere, electric field noise bands apparently harmonically related to the electron gyrofrequency with components as low as 3 kHz and as high as 50 kHz wee observed. The electric field of the fundamental was perpendicular to B/sub O/. A mechanism including the electron cyclotron instability may generate the noise band Hiss of 100-1000 Hz was observed in the outer magnetosphere. The electromagnetic hiss was generally weak and was observed in the magnetic wide band data only when it was strong. In the magnetoshealth broad band, incoherentnoise (hiss) was observed from 1 Hz to 100 kHz. This magnetosheath hiss was the strongest phenomenon observed by the plasma wave detectors during th lifetime of Explorer 45. The highest intensities of magnetosheath hiss occurred at the magnetopause. Its broad band nature suggests that magnetosheath hiss was generated locally. Broad band noise bursts and short bursts of chorus were also observed in the magnetosheath. (AIP)

• Research Organization: School of Physics and Space Science Center, University of Minnesota Minneapolis, Minnesota 55455
• OSTI ID: 7130597
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 82:1; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640203* -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CYCLOTRON INSTABILITY
EARTH ATMOSPHERE
EXPLORER SATELLITES
INSTABILITY
MAGNETIC STORMS
MAGNETOSHEATH
MAGNETOSPHERE
NOISE
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
PLASMA WAVES
PLASMAPAUSE
SATELLITES