Coronal mass ejections and large geomagnetic storms

Journal Article · Fri Jun 01 00:00:00 EDT 1990 · Geophysical Research Letters (American Geophysical Union); (USA)

DOI:https://doi.org/10.1029/GL017i007p00901· OSTI ID:6485596

Gosling, J T; Bame, S J; McComas, D J; Phillips, J L ^[1]

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1. Los Alamos National Lab., NM (USA)

Previous work indicates that coronal mass ejection (CME) events in the solar wind at 1 AU can be identified by the presence of a flux of counterstreaming solar wind halo electrons (above about 80 eV). Using this technique to identify CMEs in 1 AU plasma data, the authors find that most large geomagnetic storms during the interval surrounding the last solar maximum (Aug. 1978-Oct. 1982) were associated with Earth-passage of interplanetary disturbances in which the Earth encountered both a shock and the CME driving the shock. However, only about one CME in six encountered by Earth was effective in causing a large geomagnetic storm. Slow CMEs which did not interact strongly with the ambient solar wind ahead were particularly ineffective in a geomagnetic sense.

• OSTI ID: 6485596
• Journal Information: Geophysical Research Letters (American Geophysical Union); (USA), Journal Name: Geophysical Research Letters (American Geophysical Union); (USA) Vol. 17:7; 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
ATMOSPHERES
EARTH ATMOSPHERE
EARTH MAGNETOSPHERE
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
INTERACTIONS
INTERPLANETARY MAGNETIC FIELDS
LEPTONS
MAGNETIC FIELDS
MAGNETIC STORMS
MASS TRANSFER
RADIATIONS
SHOCK WAVES
SOLAR ACTIVITY
SOLAR CORONA
SOLAR CYCLE
SOLAR ELECTRONS
SOLAR PARTICLES
SOLAR RADIATION
SOLAR WIND
STELLAR ATMOSPHERES
STELLAR CORONAE
STELLAR RADIATION