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Near Trench 3D Seismic Attenuation Offshore Northern Hikurangi Subduction Margin, North Island, New Zealand
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2021
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Source: Journal of Geophysical Research: Solid Earth, 126(3)
[PDF-4.27 MB]
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Journal Title:Journal of Geophysical Research: Solid Earth
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Description:We image seismic attenuation near the Hikurangi trench offshore New Zealand, using ocean bottom and land-based seismometers, revealing high attenuation above a recurring shallow slow-slip event and within the subducting Hikurangi Plateau. The Hikurangi subduction margin east of the North Island, New Zealand is the site of frequent shallow slow slip events. Overpressured fluids are hypothesized to lead to slow slip at shallow depths close to the oceanic trench. Seismic attenuation, energy loss of seismic waves, can be used to detect high temperatures, melt, the presence of fluids, and fractures. We use local earthquake P- and S-waves from 180 earthquakes to invert for t*, and subsequently invert for
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Source:Journal of Geophysical Research: Solid Earth, 126(3)
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ISSN:2169-9313;2169-9356;
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Rights Information:Other
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