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Recurrence of postseismic coastal uplift, Kuril subduction zone, Japan
Author(s) -
Kelsey Harvey,
Satake Kenji,
Sawai Yuki,
Sherrod Brian,
Shimokawa Koichi,
Shishikura Masanobu
Publication year - 2006
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 - 10.1029/2006gl026052
Subject(s) - geology , subduction , seismology , tephrochronology , radiocarbon dating , holocene , cenozoic , quaternary , plate tectonics , submarine pipeline , slip (aerodynamics) , paleontology , oceanography , tectonics , volcano , structural basin , tephra , physics , thermodynamics
Coastal stratigraphy of eastern Hokkaido indicates that decimeters of coastal uplift occurred repeatedly in the late Holocene. Employing radiocarbon dating and tephrochronology, we identify along a 100 km length of the Kuril subduction zone six uplift events since ∼2,800 years B.P. Uplift events occur at the same frequency as unusually high tsunamis. Each coastal uplift event, which occurs on average every 500 years, is the product of decade‐long post seismic deep slip on the down dip extension of the seismogenic plate boundary following an offshore multi‐segment earthquake that generates unusually high tsunamis.