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Sensor maintenance during the ACO-8 cruise (5/28-6/2/2021): the BSP-5 with CTD4 and CAM2 with lights were installed.

Latest Seismogram Plots

Full Catalog of Seismogram Data Files

(Click on Thumbnails to Enlarge)


0.01-0.09 Hz Signal Envelope

4.5-19 Hz Signal Envelope

Latest seismogram time-series obtained with an OAS E-2PD hydrophone located on the JBOX frame of the observatory (Hydrophone Experiment Module). The sensor is nominally 1 m above the bottom. These graphs show low-frequency acoustic signals received by sources such as earthquakes, ships, and baleen whales.


0.01-0.09 Hz Signal Envelope

4.5-19 Hz Signal Envelope

0.01-0.09 Hz Signal Envelope

4.5-19 Hz Signal Envelope

0.01-0.09 Hz Signal Envelope

4.5-19 Hz Signal Envelope

0.01-0.09 Hz Signal Envelope

4.5-19 Hz Signal Envelope

0.01-0.09 Hz Signal Envelope

4.5-19 Hz Signal Envelope