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Very large geomagnetic disturbance during sunspot cycle 21: A predictionEvidence is presented which suggests that very large geomagnetic disturbances (350 gammas or greater at an invariant magnetic latitude of 50 degrees) occur once or twice per sunspot cycle, on the average. There is also some tendency for these disturbances to group in large odd numbered sunspot cycles similar to the current cycle, cycle 21. No such disturbance was noted during the past cycle although a series of major solar flares was observed in August 1972. At least one very large geomagnetic disturbance is expected during the current cycle; a prediction with perhaps serious consequences for electric power companies.
Document ID
19800016199
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sargent, H. H., III
(Space Environment Services Center Boulder, CO, United States)
Date Acquired
August 10, 2013
Publication Date
December 1, 1979
Publication Information
Publication: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2
Subject Category
Solar Physics
Accession Number
80N24692
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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