10.14470/3Z326135
Barreyre, Thibaut
0000-0002-5109-2633
Institut de physique du globe de Paris, France
Ottemöller, Lars
0000-0003-3170-1048
University of Bergen, Norway
Alfred Wegener Institute (AWI), Bremerhaven, Germany
Schlindwein, Vera
0000-0001-5570-2753
Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
Pedersen, Rolf B.
University of Bergen, Norway
Alfred Wegener Institute (AWI), Bremerhaven, Germany
Schmidt-Aursch, Mechita
0000-0002-2393-4514
Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
Project LOKI: DEPAS ocean-bottom seismometer operations at Loki's Castle vent field in 2019-2020
GFZ Data Services
2023
Deutsches GeoForschungsZentrum GFZ
GEOFON Data Centre
geofon@gfz-potsdam.de
Institut de physique du globe de Paris, France
Alfred Wegener Institute (AWI), Bremerhaven, Germany
University of Bergen, Norway
Broadband seismic waveforms
Seismic monitoring
temporary local seismic network
Ocean-bottom seismometer
OBS
Loki's Castle
passive seismology
DEPAS
Monitoring system
In Situ/Laboratory Instruments > Magnetic/Motion Sensors > Seismometers
In Situ Land-based Platforms > GEOPHYSICAL STATIONS/NETWORKS
2019-01-01
2023-01-01
2023-05-22
2025-07-01
en
Seismic Network
embargoed access
Creative Commons Attribution 4.0 International
10.1594/PANGAEA.957222
https://geofon.gfz-potsdam.de/waveform/archive/response/8M/2019_2020
~300G
.mseed
XML
This ocean-bottom seismometer deployment is part of the LoCHnESs (Loki Castle Hydrothermal iN-situ Experiements and Surveys) project examining hydrothermal fluid circulation at Loki's Castle vent field. The project is led by PI Thibaut Barreyre at the Centre for Deep Sea Research, Department of Earth Science, University of Bergen, Norway. A total of 8 ocean bottom seismometers (OBS) were deployed near Loki's Castle vent field at the Mohns-Knipovich Ridge bend, Norwegian-Greenland Sea. The aim of the experiment was to monitor seismicity related to changes in the hydrothermal circulation system and to reveal interaction between an active detachment fault and the axial volcanic ridge hosting the vent site. The network consisted of 8 DEPAS Lobster type broadband OBS from the German Instrument Pool for Amphibian Seismology (DEPAS). Instruments were free-fall deployed and spaced by about 5-8 km. They recorded continuously at 100 Hz for 12 months between July 2019 and July 2020. Two instruments (LOK01 and LOK06) could only be deployed one month later and recorded at 250 Hz. OBS positions at the seafloor were determined by interpolation at 2/3 of the distance between the deployment and recovery position at the seafloor. Position accuracy is estimated to be about 100 m. Skew values were obtained for all stations and reached values of up to 24 s. Clock drift in this experiment was nonlinear. Skew-corrected station LOK02 served as reference station to obtain the clock drift of all other stations using noise cross-correlation and subsequently correct also for the thus determined nonlinearity of time drift. Waveform data are available from the GEOFON data centre, under network code 8M and are embargoed until July 2025.
7.0
8.0
73.0
74.0
Arctic Ocean
Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
https://doi.org/10.13039/501100003207