Very large geomagnetic disturbance during sunspot cycle 21: A prediction

Details Very large geomagnetic disturbance during sunspot cycle 21: A prediction Very large geomagnetic disturbance during sunspot cycle 21: A prediction

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979stp.....2..193s&link_type=abstract

In NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2 p 193-197 (SEE N80-24678 15-42)

Computer Science

Magnetic Storms, Solar Terrestrial Interactions, Sunspot Cycle, Auroras, Canada, Electric Power Transmission, Solar Flares, United States, Vulnerability

Scientific paper

Evidence 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.

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