ARRA OBS – WHOI Ocean Bottom Seismograph Laboratory Skip to content

ARRA OBS

The ARRA OBS carries a Nanometrics Trillium Compact seismometer and a chip-scale atomic clock (CSAC), and is used for year-long monitoring of teleseismic and regional earthquakes. WHOI currently has 20 ARRA OBSs available in its instrument pool.

Design and Specifications