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Seasonal variations of volcanic eruption frequenciesDo volcanic eruptions have a tendency to occur more frequently in the months of May and June? Some past evidence suggests that they do. The present study, based on the new eruption catalog of Simkin et al.(1981), investigates the monthly statistics of the largest eruptions, grouped according to explosive magnitude, geographical latitude, and year. At the 2-delta level, no month-to-month variations in eruption frequency are found to be statistically significant. Examination of previously published month-to-month variations suggests that they, too, are not statistically significant. It is concluded that volcanism, at least averaged over large portions of the globe, is probably not periodic on a seasonal or annual time scale.
Document ID
19890052000
Document Type
Reprint (Version printed in journal)
Authors
Stothers, Richard B. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
May 1, 1989
Publication Information
Publication: Geophysical Research Letters
Volume: 16
ISSN: 0094-8276
Subject Category
GEOPHYSICS
Distribution Limits
Public
Copyright
Other