Fault geometry of M6-class normal-faulting earthquakes in the outer trench slope of Japan Trench from ocean bottom seismograph observations

Aftershocks of the December 7, 2012 intraplate doublet near the Japan Trench axis

On December 7, 2012, a pair of large Mw 7.2 intraplate earthquakes occurred near the Japan Trench axis off Miyagi, northeast Japan. This doublet consisted of a deep reverse-faulting event followed by a shallow normal-faulting event. Aftershock observations using conventional and newly developed ultra-deep ocean bottom seismographs in the trench axis area showed that the shallow normal-faulting ...

What controls the lateral variation of large earthquake occurrence along the Japan Trench?

The lateral (along trench axis) variation in the mode of large earthquake occurrence near the northern Japan Trench is explained by the variation in surface roughness of the subducting plate. The surface roughness of the ocean bottom near the trench is well correlated with the large-earthquake occurrence. The region where the ocean bottom is smooth is correlated with 'typical' large underthrust...

Bacterial Life at the Bottom of the Philippine Trench.

Nankai Trough, Japan Trench and Kuril Trench: geochemistry of Fluids sampled by submersible “ Nautile”

' L aboratoire de G éochim ie e l M étallogén ie (C N R S VA 196), U niversité P ierre et M arie Curie, 4 p la ce Jussieu, 75252 P aris C édex 05 (France) ' Faculty o f Science, U niversity o f Tokyo, Bunkyo-ku, T okyo 113 (Japan) ' D 3G M , IF R E M E R , C entre de Brest, B .P. 337, 29273 Brest C édex (France) 4 L aborato ire de Géochimie, U niversité L ibre de Bruxelles, 50 Av. F.D. Roosevel...

Distribution of low-frequency earthquakes accompanying the very low frequency earthquakes along the Ryukyu Trench

This study investigated the activity and distribution of low-frequency earthquakes (LFEs) accompanying the very low frequency earthquakes (VLFEs) in the central and southern Ryukyu Trench. This investigation was based on shortperiod seismometer waveforms obtained by the Japan Meteorological Agency from April 2004 to December 2015. The LFEs were detected using the Envelope Correlation Method, an...