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- Title
Mapping fluids to subduction megathrust locking and slip behavior.
- Authors
Saffer, Demian M.
- Abstract
In subduction zones, high fluid content and pore pressure are thought to promote aseismic creep, whereas well-drained conditions are thought to promote locking and failure in earthquakes. However, observations directly linking fluid content and seismic coupling remain elusive. Heise et al. (2017) use a magnetotelluric survey to image the electrical resistivity structure of the northern Hikurangi subduction thrust to ~30 km depth, as an indicator of interconnected fluid content. The authors document a clear correlation between high resistivity and a distinct geodetically locked patch and between conductive areas and weak coupling. Their study, together with other recent geophysical investigations, provides new evidence for the role of fluids in governing subduction thrust locking.
- Publication
Geophysical Research Letters, 2017, Vol 44, Issue 18, p9337
- ISSN
0094-8276
- Publication type
Article
- DOI
10.1002/2017GL075381