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The ACO website will be down on June 28, 2018 due to scheduled network maintenance.

New instruments were installed during the ACO-6 cruise on 6/20/2018 (hydrophone, secondary node). BSP1 and BSP2 disconnected from ACO until further notice. Data affected: CTD2, CTD3, Pressure and Fluorometer.

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