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Develop and field-test an autonomous marine instrument (MERMAID) designed to record teleseismic earthquakes across ocean basins for whole-Earth seismic tomography.

May 1, 2009Journal of Geophysical Research AtmospheresOpen Access

On the potential of recording earthquakes for global seismic tomography by low‐cost autonomous instruments in the oceans

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Develop and field-test an autonomous marine instrument (MERMAID) designed to record teleseismic earthquakes across ocean basins for whole-Earth seismic tomography.
Constructed a prototype integrating an autonomous Sounding Oceanographic Lagrangian Observer float, an off-the-shelf hydrophone, and custom data-logging hardware.
Developed and implemented wavelet-based processing algorithms for onboard identification and discrimination of seismic events from ambient marine noise.
Deployed the prototype at 700 m depth offshore San Diego, California, recording acoustic pressure continuously across more than 120 hours.
Recorded and successfully identified five earthquakes during 120 hours of offshore testing, including one teleseismic event.
Estimated that individual MERMAID instruments can capture up to 100 tomographically useful teleseismic earthquake events per year in marine environments.

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Implication

Field trial demonstrates autonomous underwater detection of teleseismic earthquakes, indicating the feasibility of oceanic float arrays for global tomography.

Cite This Study

Simons et al. (2009) studied this question.

synapsesocial.com/papers/6a035d5a59ea043e4c9e50c3 https://doi.org/10.1029/2008jb006088

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Implication

Field trial demonstrates autonomous underwater detection of teleseismic earthquakes, indicating the feasibility of oceanic float arrays for global tomography.

On the potential of recording earthquakes for global seismic tomography by low‐cost autonomous instruments in the oceans

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Discussion

Implication

Cite This Study

On the potential of recording earthquakes for global seismic tomography by low‐cost autonomous instruments in the oceans

Key Points

Discussion

Implication

Cite This Study

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