Journal
EARTH PLANETS AND SPACE
Volume 64, Issue 4, Pages I-IVPublisher
SPRINGEROPEN
DOI: 10.5047/eps.2011.11.002
Keywords
Hotspot; mantle plume; tsunami; ocean-bottom seismograph; ocean-bottom electro-magnetometer
Categories
Funding
- Japan Society for the Promotion of Science [19253004]
- INSU CNRS
- Grants-in-Aid for Scientific Research [23540505, 19253004] Funding Source: KAKEN
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We conducted geophysical observations on the French Polynesian seafloor in the Pacific Ocean from 2009 to 2010 to determine the mantle structure beneath the Society hotspot, which is a region of underlying volcanic activity responsible for forming the Society Islands. The network for Tomographic Investigation by seafloor ARray Experiment for the Society hotspot (TIARES, named after the most common flower in Tahiti) is composed of multi-sensor stations that include broadband ocean-bottom seismometers, ocean-bottom electro-magnetometers, and differential pressure gauges. The network is designed to obtain seismic and electrical conductivity structures of the mantle beneath the Society hotspot. In addition to providing data to study the mantle structure, the TIARES network recorded unprecedented data of pressure and electromagnetic (EM) signals by tsunamis associated with large earthquakes in the Pacific Ocean, including the 2010 Chilean earthquake (M-w 8.8).
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