Project BRAVOSEIS: DEPAS ocean-bottom seismometer operations in the Bransfield Strait in 2019-2020

• Main Authors: Schmidt-Aursch, Mechita, Almendros, Javier, Geissler, Wolfram H
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2021
• Subjects: Bransfield Strait; DEPAS; ocean-bottom seismometer; Passive seismology; Event label; Project; Principal investigator; Code; Station label; Date/time start; LATITUDE; LONGITUDE; ELEVATION; Date/time end; Clock skew; Recorder type; Recorder, serial number; Seismometer type; Seismometer, serial number; Seismometer gain; Hydrophone type; Hydrophone, serial number; Hydrophone gain; Hydrophone polarity; Sampling rate; Cruise/expedition; Comment; Binary Object; Ocean bottom seismometer; Marine Geophysics @ AWI AWI_GeoPhy; Antarctic; Orca Seamount; Sarmiento; The Antarctic; Antarc*; Antarctica; Orca
• Online Access: https://dx.doi.org/10.1594/pangaea.934130; https://doi.pangaea.de/10.1594/PANGAEA.934130

BRAVOSEIS (Bransfield Volcano Seismology) is an interdisciplinary project exploring volcanism in the Bransfield back-arc basin, Antarctica. Partners from Spain (amongst others UGR, project leader), Germany (AWI, GFZ) and the US (CUNY, UW, WHOI) performed various geophysical onshore and offshore measurements in the Antarctic seasons 2017-2018, 2018-2019 and 2019-2020. A key element of the project was the operation of a large long-term amphibious network of broadband seismometer in the Bransfield Strait, on the adjoining South Sheltland Islands, and on the Antarctic Peninsula.Nine broadband coean-bottom seismometer (OBS) from the German Instrument Pool of Amphibian Seismology (DEPAS) were deployed as part of this network with RV Sarmiento de Gamboa in January 2019 (cruise SDG076). They were distributed along the entire basin, one station supplemented a dense array of short-period OBS around the Orca seamount. Eight instruments could be recovered in February 2020 with RV Hespérides (cruise HE0188), one OBS is still missing. All stations recorded data for the full deployment period. Unfortunately, the clock drift of all stations turned out to be non-linear, a skew measurement was possible for four stations only.