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Linkages between turbidites in the southern Okinawa Trough and submarine earthquakes
Author(s) -
Huh ChihAn,
Su ChihChieh,
Liang WenTzong,
Ling ChiaoYuen
Publication year - 2004
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 - 10.1029/2004gl019731
Subject(s) - geology , turbidite , trough (economics) , seismology , submarine , oceanography , sediment , paleontology , economics , macroeconomics
Turbidite layers in surficial (<0.4 m) sediments of the southern Okinawa Trough and its vicinity were dated by 210 Pb and further constrained by 137 Cs and inter‐site correlation of downcore profiles of particle size and porosity. Here we show striking temporal and spatial correspondence of such episodic deposits to large (M L > 6.8) submarine earthquakes recorded in the region since the 20th century. The repeating pattern of turbidite layers reported here on decadal to centennial time scales suggests what may be the long‐term rhythm of seismic activities at this tectonically active plate boundary.