Near Trench 3D Seismic Attenuation Offshore Northern Hikurangi Subduction Margin, North Island, New Zealand

Nakai, Jenny S.; Sheehan, Anne F.; Abercrombie, Rachel E.; Eberhart‐Phillips, Donna

doi:10.1029/2020jb020810

i

Near Trench 3D Seismic Attenuation Offshore Northern Hikurangi Subduction Margin, North Island, New Zealand

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2021
By Nakai, Jenny S. ; Sheehan, Anne F. ; Abercrombie, Rachel E. ; ...

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Journal Title:

Journal of Geophysical Research: Solid Earth
Personal Author:

Nakai, Jenny S. ; Sheehan, Anne F. ; Abercrombie, Rachel E. ; Eberhart‐Phillips, Donna
NOAA Program & Office:

CIRES (Cooperative Institute for Research in Environmental Sciences)
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
Keywords:

Earth And Planetary Sciences (miscellaneous) Geochemistry And Petrology Geophysics Space And Planetary Science Earth And Planetary Sciences (miscellaneous) Geochemistry And Petrology Space And Planetary Science Earth And Planetary Sciences (miscellaneous) Geochemistry And Petrology Space And Planetary Science
Source:

Journal of Geophysical Research: Solid Earth, 126(3)
DOI:

https://doi.org/10.1029/2020jb020810
ISSN:

2169-9313 ; 2169-9356
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PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
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urn:sha256:5540ab73b2e4ad2990b3e190ce9683019025b97020cfc94c7ff310fb9851c1a5
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https://repository.library.noaa.gov/view/noaa/54179/noaa_54179_DS1.pdf
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