Deep tremor in New Zealand triggered by the 2010 Mw8.8 Chile earthquake

Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

3

Seismology: Seismicity And Tectonics (1207, 1217, 1240, 1242), Seismology: Subduction Zones (1207, 1219, 1240), Seismology: Surface Waves And Free Oscillations

Scientific paper

Deep non-volcanic tremor (NVT) is usually associated with episodic slow-slip events. New Zealand is one notable exception where numerous slow slip events have been identified, yet NVT has remained undetected. Here we present the first known case of triggered NVT at New Zealand's Hikurangi subduction margin. Following the Mw8.8 Chilean earthquake of February 27, 2010, we identify coherent high-frequency tremor signals that are in phase with, and modulated by, the passing Rayleigh waves. This is consistent with the surface wave triggering potential for strike-normal incidence on a low-angle thrust fault. After constraining the tremor depth on the plate interface, we locate the tremor source within 20 km of the source area of episodic slow slip. The tremor location is also near the edge of a region with high seismic attenuation that marks the boundary between dehydrated subducted slab and inferred hydrated, underplated sediment. We speculate that reduced interface friction and high fluid pressures provided by fluid-rich underplated sediment facilitates the tremor generation.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Deep tremor in New Zealand triggered by the 2010 Mw8.8 Chile earthquake 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 Deep tremor in New Zealand triggered by the 2010 Mw8.8 Chile earthquake, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Deep tremor in New Zealand triggered by the 2010 Mw8.8 Chile earthquake will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1675310

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.