71) Using the
Gutenberg-Ritcher recurrence relationship, the mean annual rate of
exceedance of the earthquake occurrence in a seismic belt is 0.3 per
year for an earthquake of magnitude 6.0. The return period for an
earthquake of magnitude 6.0 in this belt is _________ years.
(Thanks Anand AU)
Sol:
The reciprocal of the
annual rate of exceedance for a particular magnitude is commonly
referred to as the return period of earthquakes exceeding that
magnitude.
$return
period=\frac{1}{N}=\frac{1}{0.3}=3.33 years$
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