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Aftershock occurrence rate decay properties for intermediate and deep earthquake sequences
Author(s) -
Nyffenegger Paul,
Frohlich Cliff
Publication year - 2000
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1998gl010371
Subject(s) - aftershock , seismology , geology , geophysics
We perform a detailed analysis of seven aftershock sequences with intermediate‐ or deep‐focus mainshocks occurring in the Aleutian Islands, Japan, the Pamir‐Hindu Kush (PHK), Tonga, and Bolivia. For each sequence we determine the modified Omori law (MOL) p value and goodness of fit. For all sequences, we are able to find a time interval where the sequence conforms to MOL decay with either c ≡ 0 or c variable. The two sequences with deep‐focus mainshocks have slightly larger p values than the intermediate depth sequences. Despite the rarity of well defined intermediate or deep aftershock sequences, neither the observed p values nor the overall sequence decay behavior significantly differ from that observed for shallow sequences.