The OOI RCA and COSZO broadband seismometers collect and stream three-component ground velocity data in real-time. The data can be used to search for and localize shallow tremor signals and very low frequency earthquakes, accurately localize earthquakes below the continental shelf, measure temporal changes in the velocity structure of the accretionary prism, and facilitate offshore earthquake early warning research.

The velocity time series can be retrieved from EarthScope Data Services. Below are links to the station summaries, listed by site. 

For tools to access the data, select the "Data" tab at the top of the EarthScope Station Summary page.

PN1A (Slope Base)

OO HYSB1 - Guralp CMG-1T, 360s, 3000 V/m/s-DM-24 Mk3 Fixed Gain, ga; Sample rates: 1 Hz, 8 Hz, 40 Hz, 200 Hz

PN1B

COSZO instrument (coming in 2026) - Nanometrics Atlantis Cabled Observatory (Trillium 360 Ocean Bottom Broadband Seismometer, Class A Titan Accelerometer, Centaur Gen 5 Datalogger); Sample rates: 1 Hz, 8 Hz, 40 Hz, 200 Hz

Southern Hydrate Ridge

OO HYS14 - Guralp CMG-1T, 360s, 3000 V/m/s-DM-24 Mk3 Fixed Gain, ga; Sample rates: 1 Hz, 8 Hz, 40 Hz, 200 Hz

PN1C (Offshore)

COSZO instrument (coming in 2026) - Nanometrics Atlantis Cabled Observatory (Trillium 360 Ocean Bottom Broadband Seismometer, Class A Titan Accelerometer, Centaur Gen 5 Datalogger); Sample rates: 1 Hz, 8 Hz, 40 Hz, 200 Hz

PN1D

COSZO instrument (coming in 2026) - Nanometrics Atlantis Cabled Observatory (Trillium 360 Ocean Bottom Broadband Seismometer, Class A Titan Accelerometer, Centaur Gen 5 Datalogger); Sample rates: 1 Hz, 8 Hz, 40 Hz, 200 Hz

Oregon Shelf

COSZO instrument (coming in 2026) - Nanometrics Atlantis Cabled Observatory (Trillium 360 Ocean Bottom Broadband Seismometer, Class A Titan Accelerometer, Centaur Gen 5 Datalogger); Sample rates: 1 Hz, 8 Hz, 40 Hz, 200 Hz