A barrage of relativistic solar particle events

Journal Article · Wed Aug 01 00:00:00 EDT 1990 · EOS, Transactions, American Geophysical Union; (United States)

DOI:https://doi.org/10.1029/EO071i033p01027-01· OSTI ID:5558106

Bieber, J W; Evenson, P; Pomerantz, M A ^[1]

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1. Bartol Research Institute, Newark, DE (United States)

During a four-month period beginning July 25, 1989, the sun released an unprecedented barrage of seven relativistic solar particle events detectable with ground-based instrumentation. These 'ground-level enhancements' are the first to occur in the present sunspot cycle, and they include the largest event observed since 1956. Several events are distinguished by unusual fine structure in their time profiles, and one event exhibits an extraordinary spikelike feature at event onset. This paper briefly discusses the characteristics of the time profiles. 10 refs.

• OSTI ID: 5558106
• Journal Information: EOS, Transactions, American Geophysical Union; (United States), Vol. 71; ISSN 0096-3941
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
SOLAR PARTICLES
DETECTION
ACCELERATION
COSMIC RADIATION
EARTH PLANET
GROUND LEVEL
SOLAR ACTIVITY
SOLAR FLARES
SOLAR NEUTRONS
SOLAR RADIATION
SUNSPOTS
BARYONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
IONIZING RADIATIONS
LEVELS
NEUTRONS
NUCLEONS
PLANETS
RADIATIONS
STARSPOTS
STELLAR ACTIVITY
STELLAR RADIATION
661320* - Auroral
Ionospheric
& Magnetospheric Phenomena- (1992-)