The Pacific OBS Research into Convecting Asthenosphere (ORCA) Experiment

Zachary C. Eilon; James B. Gaherty; Lun Zhang; Joshua Russell; Sean McPeak; Joseph Phillips; Donald W. Forsyth; Göran Ekström

doi:10.1785/0220210173

The Pacific OBS Research into Convecting Asthenosphere (ORCA) Experiment

Zachary C. Eilon, James B. Gaherty, Lun Zhang, Joshua Russell, Sean McPeak, Joseph Phillips, Donald W. Forsyth, Göran Ekström

Earth and Sustainability

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The Pacific ocean-bottom seismometer (OBS) Research into Convecting Asthenosphere (ORCA) experiment deployed two 30-station seismic arrays between 2018 and 2020—a US contribution to the international PacificArray project. The “Young ORCA” array deployed on ∼40 Ma central Pacific seafloor had a ∼68% data recovery rate, whereas the “Old ORCA” array deployed on ∼120 Ma southwest Pacific seafloor had a ∼80% recovery rate. We detail here the seismic data quality, spectral characteristics, and engineering challenges of this experiment. We provide information to assist users of this dataset, including OBS orientations and tables of daily data quality for all channels. Preliminary analysis illustrates the utility of these data for surface- and body-wave seismic imaging.

Original language	English (US)
Pages (from-to)	477-493
Number of pages	17
Journal	Seismological Research Letters
Volume	93
Issue number	1
DOIs	https://doi.org/10.1785/0220210173
State	Published - Jan 1 2022

ASJC Scopus subject areas

Geophysics

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abstract = "The Pacific ocean-bottom seismometer (OBS) Research into Convecting Asthenosphere (ORCA) experiment deployed two 30-station seismic arrays between 2018 and 2020—a US contribution to the international PacificArray project. The “Young ORCA” array deployed on ∼40 Ma central Pacific seafloor had a ∼68% data recovery rate, whereas the “Old ORCA” array deployed on ∼120 Ma southwest Pacific seafloor had a ∼80% recovery rate. We detail here the seismic data quality, spectral characteristics, and engineering challenges of this experiment. We provide information to assist users of this dataset, including OBS orientations and tables of daily data quality for all channels. Preliminary analysis illustrates the utility of these data for surface- and body-wave seismic imaging.",

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AU - Phillips, Joseph

AU - Forsyth, Donald W.

AU - Ekström, Göran

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The Pacific OBS Research into Convecting Asthenosphere (ORCA) Experiment

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