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Times and magnitudes (Richter scale) of 483 shallow earthquakes in an offshore region east of Honshu and south of Hokkaido, for the period 1885--1980.
data(quake)
An irregular time series with earthquake
in days since start of 1885
magnitude (Richter scale)
Davison, A. C. (2003) Statistical Models. Cambridge University Press. Page 289.