/* DATA DESCRIPTION: Citation: Weigelt, Estella; Geissler, Wolfram H; Jokat, Wilfried (2026): Raw seismic refraction data recorded during RV POLARSTERN cruise PS74, Arctic Ocean, AWI-20090250 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993362 (DOI registration in progress) Abstract: As part of RV Polarstern cruise PS74, three seismic refraction profiles were collected across the East-Greenland shelf and margin to gather new information on the tectonic and glacial history of East Greenland and its ice shield. The acquired data set covers data from a total of 51 stations, including 4 on land stations. The seismic refraction line AWI-20090100 was in the prolongation of the Kong Oscar Fjord across the Kolbeinsey Ridge. It supplements profiles gathered more in the north in 2003. The second set of profiles (AWI-20090200 and AWI-20090250) was located in the Boreas Basin and terminated at the mid-ocean Knipovich Ridge. Here, in addition, a seismological detection array was deployed for 10 days recording the seismicity of the ultra-slow ridge between two magmatic segments. The seismic energy was generated by an array of 8x8.3 L G-guns, fired every 60 s at 200 bar. The refracted signals were collected by DEPAS LOBSTER (Longterm Ocean Bottom Seismometer for Tsunami and Earthquake Research) instruments equipped with three-components ocean bottom seismometers (OBS) and a hydrophone. The onshore stations comprised by 3 x 3 4.5 Hz-geophone chains (REFTEK). Except one OBS station, all instruments were successfully recovered after finishing the experiment. Survey information and detailed data acquisition parameters for the profiles are documented in the expedition report (Jokat, 2010) and in a metadata-file listed below. The present data set provides raw data concerning the refraction seismic profile AWI-20090250. 6 OBS were deployed along a ~130 km long line. The data set comprises for the whole profile (a) the scanned field protocol, (b) the scanned field protocol for the releasers, (c) a table with all compiled metadata and information on the stations, (d) navigational data, (e) shot point positions, and (f) an overall ReadMe-file with information on the whole seismic refraction experiment. For each station the set comprises (g) original raw data files in mcs-format, and (h) log-files. Keyword(s): AWI-20090250; AWI Geophysics; East Greenland; PS74; RV Polarstern; Seismic refraction data Related to: Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung; et al. (2017): DEPAS (Deutscher Geräte-Pool für amphibische Seismologie): German Instrument Pool for Amphibian Seismology. Journal of large-scale research facilities JLSRF, 3, https://doi.org/10.17815/jlsrf-3-165 Jokat, Wilfried (2010): The Expedition of the Research Vessel Polarstern to the Arctic in 2009 (ARK-XXIV/3). Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 615, 186 pp, https://doi.org/10.2312/BzPM_0615_2010 Jokat, Wilfried (2015): Station list and links to master tracks in different resolutions of POLARSTERN cruise ARK-XXIV/3, Reykjavik - Bremerhaven, 2009-08-05 - 2009-09-25 [dataset]. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.847941 Schenke, Hans Werner; Jensen, Laura; Amabrova, Anastasia; Damaske, Daniel; Prokoph, Andreas (2010): Swath sonar bathymetry during POLARSTERN cruise ARK-XXIV/3 (PS74) with links to multibeam raw data files [dataset]. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.746559 Other version: Weigelt, Estella; Geissler, Wolfram H; Jokat, Wilfried (2026): Primary seismic refraction data recorded during RV POLARSTERN cruise PS74, Arctic Ocean, profile AWI-20090250 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993373 Additional metadata: Field protocols of seismic refraction data, ark2009 (URI: https://download.pangaea.de/reference/138918/attachments/ark2009_rfr_FieldProtocol_releaser.pdf) Field protocols of seismic refraction data, LOBSTER Station Protocol, akr2009 (URI: https://download.pangaea.de/reference/138919/attachments/ark20090200-250_rfr_FieldProtocols.pdf) Navigation documentation of seismic refraction data, profile AWI-20090250 (URI: https://download.pangaea.de/reference/138935/attachments/20090250_rfr_navigation.txt) Navigational data with longitude and latitude of shotpoints, profile AWI-20090250 (URI: https://download.pangaea.de/reference/138934/attachments/20090250_rfr_shotpoints.txt) ReadMe - ark2009 metadata (URI: https://download.pangaea.de/reference/138922/attachments/ark2009_rfr_overall_README.txt) Project(s): Marine Geophysics @ AWI (AWI_GeoPhy) (URI: https://www.awi.de/en/science/geosciences/geophysics.html) Coverage: MEDIAN LATITUDE: 76.353983 * MEDIAN LONGITUDE: 7.173517 * SOUTH-BOUND LATITUDE: 75.895500 * WEST-BOUND LONGITUDE: 7.085300 * NORTH-BOUND LATITUDE: 76.758200 * EAST-BOUND LONGITUDE: 7.370700 DATE/TIME START: 2009-08-27T15:22:00 * DATE/TIME END: 2009-09-06T12:30:00 MINIMUM ELEVATION: -3562 m a.s.l. * MAXIMUM ELEVATION: -2930 m a.s.l. Event(s): PS74/289-1 * LATITUDE: 76.092700 * LONGITUDE: 7.197000 * DATE/TIME: 2009-08-27T15:22:00 * ELEVATION: -3447.0 m * LOCATION: North Greenland Sea * CAMPAIGN: ARK-XXIV/3 (PS74) (URI: https://doi.org/10.2312/BzPM_0615_2010) * BASIS: Polarstern (URI: https://doi.org/10.17815/jlsrf-3-163) * METHOD/DEVICE: Ocean bottom seismometer (OBS) PS74/295-1 * LATITUDE: 76.629700 * LONGITUDE: 7.158800 * DATE/TIME: 2009-08-28T03:51:00 * ELEVATION: -2943.0 m * LOCATION: North Greenland Sea * CAMPAIGN: ARK-XXIV/3 (PS74) (URI: https://doi.org/10.2312/BzPM_0615_2010) * BASIS: Polarstern (URI: https://doi.org/10.17815/jlsrf-3-163) * METHOD/DEVICE: Ocean bottom seismometer (OBS) PS74/296-1 * LATITUDE: 76.758200 * LONGITUDE: 7.370700 * DATE/TIME: 2009-08-28T04:58:00 * ELEVATION: -3560.0 m * LOCATION: North Greenland Sea * CAMPAIGN: ARK-XXIV/3 (PS74) (URI: https://doi.org/10.2312/BzPM_0615_2010) * BASIS: Polarstern (URI: https://doi.org/10.17815/jlsrf-3-163) * METHOD/DEVICE: Ocean bottom seismometer (OBS) PS74/299-1 * LATITUDE: 76.448800 * LONGITUDE: 7.085300 * DATE/TIME: 2009-08-28T09:07:00 * ELEVATION: -3562.0 m * LOCATION: North Greenland Sea * CAMPAIGN: ARK-XXIV/3 (PS74) (URI: https://doi.org/10.2312/BzPM_0615_2010) * BASIS: Polarstern (URI: https://doi.org/10.17815/jlsrf-3-163) * METHOD/DEVICE: Ocean bottom seismometer (OBS) PS74/300-1 * LATITUDE: 76.298800 * LONGITUDE: 7.089000 * DATE/TIME: 2009-08-28T10:15:00 * ELEVATION: -3536.0 m * LOCATION: North Greenland Sea * CAMPAIGN: ARK-XXIV/3 (PS74) (URI: https://doi.org/10.2312/BzPM_0615_2010) * BASIS: Polarstern (URI: https://doi.org/10.17815/jlsrf-3-163) * METHOD/DEVICE: Ocean bottom seismometer (OBS) PS74/301-1 * LATITUDE: 75.895700 * LONGITUDE: 7.139700 * DATE/TIME: 2009-08-28T12:52:00 * ELEVATION: -2947.0 m * LOCATION: North Greenland Sea * CAMPAIGN: ARK-XXIV/3 (PS74) (URI: https://doi.org/10.2312/BzPM_0615_2010) * BASIS: Polarstern (URI: https://doi.org/10.17815/jlsrf-3-163) * METHOD/DEVICE: Ocean bottom seismometer (OBS) PS74/318-1 (AWI-20090250) * LATITUDE START: 76.761500 * LONGITUDE START: 7.357500 * LATITUDE END: 75.663700 * LONGITUDE END: 7.338000 * DATE/TIME START: 2009-09-05T23:14:00 * DATE/TIME END: 2009-09-06T12:30:00 * ELEVATION START: -3545.0 m * ELEVATION END: -3462.0 m * LOCATION: North Greenland Sea * CAMPAIGN: ARK-XXIV/3 (PS74) (URI: https://doi.org/10.2312/BzPM_0615_2010) * BASIS: Polarstern (URI: https://doi.org/10.17815/jlsrf-3-163) * METHOD/DEVICE: Seismic refraction profile (SEISREFR) Parameter(s): Event label (Event) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) Station label (Station) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) Date/time start (Date/time start) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) * COMMENT: Sync Time UTC Date/time start (Date/time start) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) * COMMENT: Recording UTC Date/time start (Date/time start) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) * COMMENT: Deployment UTC LONGITUDE (Longitude) * GEOCODE * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) LATITUDE (Latitude) * GEOCODE * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) ELEVATION [m a.s.l.] (Elevation) * GEOCODE * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) Relocation [m] (Relocation) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) Date/time end (Date/time end) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) * COMMENT: Recovery, releaser time, local time Date/time end (Date/time end) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) * COMMENT: Recording UTC Date/time end (Date/time end) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) * COMMENT: Skewtime UTC Clock skew [µs] (Skew) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) Instrument (Instrument) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) Recorder type (Recorder) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) Recorder, serial number (Recorder SN) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) Seismometer type (Seismometer) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) Seismometer, serial number (Seismometer SN) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) Hydrophone type (Hydrophone) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) Releaser, serial number (Releaser SN) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) Hydrophone gain (Hydrophone gain) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) * COMMENT: Hydro 1 Seismometer gain (Seismometer gain) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) * COMMENT: X Seis 2 Seismometer gain (Seismometer gain) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) * COMMENT: Y Seis 3 Seismometer gain (Seismometer gain) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) * COMMENT: Z Seis 4 Sampling rate [Hz] (Sampling rate) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) Binary Object (Binary) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) * COMMENT: Log file (Binary) Binary Object (Binary) * PI: Weigelt, Estella (https://orcid.org/0000-0003-1598-456X, estella.weigelt@awi.de) * COMMENT: Raw data files (Binary) in MCS-format License: Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/) Status: Curation Level: Enhanced curation (URI: https://wiki.pangaea.de/wiki/Curation_levels) * Processing Level: PANGAEA data processing level 1 (URI: https://wiki.pangaea.de/wiki/Processing_levels#PANGAEA_data_processing_level_1) Size: 138 data points Files: All files referred to in data matrix can be downloaded in one go as ZIP or TAR (PANGAEA user account required). To download single files, use the filename from data matrix appended to "https://download.pangaea.de/dataset/993362/files/". */ Event Station Date/time start (Sync Time UTC) Date/time start (Recording UTC) Date/time start (Deployment UTC) Longitude Latitude Elevation [m a.s.l.] Relocation [m] Date/time end (Recovery, releaser time, loca...) Date/time end (Recording UTC) Date/time end (Skewtime UTC) Skew [µs] Instrument Recorder Recorder SN Seismometer Seismometer SN Hydrophone Releaser SN Hydrophone gain (Hydro 1) Seismometer gain (X Seis 2) Seismometer gain (Y Seis 3) Seismometer gain (Z Seis 4) Sampling rate [Hz] Binary (Log file (Binary)) Binary (Raw data files (Binary) in MC...) PS74/289-1 20090200st216 2009-08-27T11:48:05 2009-08-27T11:49:51 2009-08-27T15:22 7.1970 76.0930 -3447 -371 2009-09-07T21:34 2009-09-07T23:00:58 2009-09-07T23:01:25 -5625 OBS_AWI LOBSTER GEOLON-MCS 50904 Güralp CMG-40T 1205-012 312112 51153 4 1 1 1 100 20090250st216.log 20090250st216.raw PS74/295-1 20090200st222 2009-08-27T20:23:49 2009-08-27T20:25:01 2009-08-28T03:50 7.1588 76.6296 -2943 -112 2009-09-07T06:00 2009-09-07T08:06:51 2009-09-07T08:07:14 13343 OBS_AWI LOBSTER GEOLON-MCS 50924 Güralp CMG-40T 0906-033 312111 51150 4 1 1 1 100 20090250st222.log 20090250st222.raw PS74/296-1 20090200st223 2009-08-27T23:19:55 2009-08-27T23:21:14 2009-08-28T04:57 7.3707 76.7582 -3560 -94 2009-09-07T08:25 2009-09-07T11:51:37 2009-09-07T11:51:52 22437 OBS_AWI LOBSTER GEOLON-MCS 60754 Güralp CMG-40T 0906-045 31208205 606129 4 1 1 1 100 20090250st223.log 20090250st223.raw PS74/299-1 20090200st226 2009-08-28T01:10:38 2009-08-28T01:12:28 2009-08-28T09:06 7.0853 76.4488 -3562 -593 2009-09-07T16:05 2009-09-07T18:32:24 2009-09-07T18:32:57 -2719 OBS_AWI LOBSTER GEOLON-MCS 60728 Güralp CMG-40T 0906-060 31206305 51160 4 1 1 1 100 20090250st226.log 20090250st226.raw PS74/300-1 20090200st227 2009-08-28T09:50:34 2009-08-28T09:51:10 2009-08-28T10:15 7.0890 76.2988 -3536 -823 2009-09-07T18:40 2009-09-07T20:28:34 2009-09-07T20:28:59 1625 OBS_AWI LOBSTER GEOLON-MCS 60730 Güralp CMG-40T 0906-066 312122 60114 4 1 1 1 100 20090250st227.log 20090250st227.raw PS74/301-1 20090200st228 2009-08-28T10:49:29 2009-08-28T11:03:06 2009-08-28T12:51 7.1403 75.8955 -2930 24 2009-09-06T14:32 2009-09-06T16:43:10 2009-09-06T16:44:08 -27875 OBS_AWI LOBSTER GEOLON-MCS 60738 Güralp CMG-40T 0906-053 312107 606125 4 1 1 1 100 20090250st228.log 20090250st228.raw