Very-low-frequency earthquakes indicate a transpressional stress regime in the Nankai accretionary prism

Details Very-low-frequency earthquakes indicate a transpressional stress regime in the Nankai accretionary prism Very-low-frequency earthquakes indicate a transpressional stress regime in the Nankai accretionary prism

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3620309i&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 20, CiteID L20309

Physics

Geophysics

3

Tectonophysics: Stresses: General, Tectonophysics: Dynamics: Seismotectonics, Tectonophysics: Subduction Zone Processes (1031, 3060, 3613, 8413), Marine Geology And Geophysics: Ocean Drilling, Marine Geology And Geophysics: Seafloor Morphology, Geology, And Geophysics

Scientific paper

We investigated the stress field within the Nankai accretionary prism of southwestern Japan, where very-low-frequency (VLF) earthquakes occur associated with thrust faulting. A northwest-southeast azimuth of the maximum horizontal principal stress previously estimated from borehole breakouts in wells drilled in the region by deep-sea drilling vessel Chikyu suggests trench-normal shortening, although strike-slip and normal faulting are also possible within a thrust-dominated tectonic environment. We estimated stress orientations and stress ratios by using stress tensor inversion to derive moment tensor solutions for VLF earthquakes in three regions along the Nankai Trough: off Kumano, off Muroto, and Hyuga-nada. The stress orientations we obtained indicate that the regions off Kumano and off Muroto are within a transpressional stress regime with trench-normal shortening, whereas the Hyuga-nada region on the westernmost edge of the Nankai accretionary prism is in a reverse-faulting regime.

Affiliated with

Also associated with

No associations

Rating

Very-low-frequency earthquakes indicate a transpressional stress regime in the Nankai accretionary prism does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Very-low-frequency earthquakes indicate a transpressional stress regime in the Nankai accretionary prism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Very-low-frequency earthquakes indicate a transpressional stress regime in the Nankai accretionary prism will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1513859