Schweitzer, Johannes; Schmidt-Aursch, Mechita; Krüger, Frank; Guterch, Aleksander (2024): Project BEAR ISLAND: DEPAS ocean-bottom seismometer operations in the Fram Strait in 2007-2008 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.972423 (DOI registration in progress)
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Abstract:
BEAR ISLAND (The Dynamic Continental Margin Between the Mid-Atlantic-Ridge System (Mohns Ridge, Knipovich Ridge) and the Bear Island Region) is an interdisciplinary project exploring the stress conditions and sources, and the dynamics and deformation characteristics of the continental margin between the Mid-Atlantic Ridge and Bear Island from its top sedimentary cover to its imprint in the upper mantle. In this region the margin includes an extremely thick sedimentary wedge and steep slopes, with at least one major paleo-fracture zone cutting through the wedge. Recent studies in this area indicate very low seismic velocities in the lithosphere and the stress field undergoes an extensional-compressional transition. It is therefore of particular interest to understand the structural architecture, the stress and the dynamics of the whole region because of its natural hazard exposure and the processes involved in the formation of the margin and the opening of the North Atlantic.
To achieve this, deep seismic sounding data, as well as records from temporary broadband installations, supplementary to data from existing seismic stations in the region were collected. A key element of the project was the operation of a long-term network of broadband ocean-bottom seismometera (OBS). Additionally, two new broadband seismometers and a small temporary seismic array with 13 sensors were operated. Active seismic refraction/reflection experiments were conducted along two profiles crossing the region and recorded with additional short period OBSs and land stations.
Twelve broadband coean-bottom seismometer (OBS) from the German Instrument Pool of Amphibian Seismology (DEPAS) were deployed as part of this network with RV Horyzont II in September 2007. They were distributed on the Barents shelf, the slope and the deep sea near the Mid-Atlantic Ridge. Nine instruments could be recovered in August 2008 with RV Horyzont II. One instrument was fished before, one was destroyed during recovery and one got lost. Seven stations recorded data for the full deployment period; two stations have no skew value. Based on previous experiments, the accuracy of the positions is estimated to 500 m.
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
Czuba, Wojciech; Grad, Marek; Mjelde, Rolf; Guterch, Aleksander; Libak, Audun; Krüger, Frank; Murai, Yoshio; Schweitzer, Johannes; IPY Project Group (2011): Continent-ocean-transition across a trans-tensional margin segment: off Bear Island, Barents Sea. Geophysical Journal International, 184(2), 541-554, https://doi.org/10.1111/j.1365-246X.2010.04873.x
Hauser, Juerg; Dyer, Kathleen M; Pasyanos, Michael E; Bungum, Hilmar; Faleide, Jan Inge; Clark, Stephen A; Schweitzer, Johannes (2011): A probabilistic seismic model for the European Arctic. Journal of Geophysical Research, 116(B1), B01303, https://doi.org/10.1029/2010JB007889
Libak, Audun; Mjelde, Rolf; Keers, Henk; Faleide, Jan Inge; Murai, Yoshio (2012): An integrated geophysical study of Vestbakken Volcanic Province, western Barents Sea continental margin, and adjacent oceanic crust. Marine Geophysical Research, 33(2), 185-207, https://doi.org/10.1007/s11001-012-9155-3
Pirli, Myrto; Schweitzer, Johannes (2018): BARENTS16: a 1-D velocity model for the western Barents Sea. Journal of Seismology, 22(1), 69-81, https://doi.org/10.1007/s10950-017-9692-y
Pirli, Myrto; Schweitzer, Johannes (2018): Seismicity along the Mohns-Knipovich Ridge Bend and its correlation to ridge spreading rate. Journal of Geodynamics, 118, 182-196, https://doi.org/10.1016/j.jog.2018.01.013
Pirli, Myrto; Schweitzer, Johannes; IPY Project Group (2011): The International Polar Year (IPY) broadband ocean-bottom seismograph deployment: observations, limitations and integration with the IPY land network. NORSAR, https://doi.org/10.21348/P.2011.0001
Schweitzer, Johannes; IPY Project Group (2008): The International Polar Year 2007-2008 Project "The Dynamic Continental Margin between the Mid-Atlantic-Ridge System (Mohn's Ridge, Knipovich Ridge) and the Bear Island Region". NORSAR, https://doi.org/10.21348/P.2008.0001
Schweitzer, Johannes; Paulsen, Berit; Antonovskaya, Galina N; Fedorov, Andrey V; Konechnaya, Yana V; Asming, Vladimir E; Pirli, Myrto (2021): A 24-Yr-Long Seismic Bulletin for the European Arctic. Seismological Research Letters, 92(5), 2758-2767, https://doi.org/10.1785/0220210018
Schweitzer, Johannes; Paulsen, Berit; Antonovskaya, Galina N; Fedorov, Andrey V; Konechnaya, Yana V; Asming, Vladimir E; Pirli, Myrto (2022): EURARC - a bulletin for the European Arctic 1990 - 2013 [dataset]. ISC Seismological Dataset Repository,, https://doi.org/10.31905/TYLLQY8T
Schweitzer, Johannes; Schmidt-Aursch, Mechita; Krüger, Frank; Guterch, Aleksander (2024): BEAR ISLAND: DEPAS ocean-bottom seismometer operations in the Fram Strait in 2007-2008 [dataset]. Deutsches GeoForschungsZentrum GFZ, https://doi.org/10.14470/4P044426
Project(s):
Marine Geophysics @ AWI (AWI_GeoPhy)
Funding:
The Research Council of Norway (RCN), grant/award no. 176069: The Dynamic Continental Margin Between the Mid-Atlantic-Ridge System (Mohns Ridge, Knipovich Ridge) and the Bear Island Region
Coverage:
Median Latitude: 74.118920 * Median Longitude: 12.791650 * South-bound Latitude: 72.850300 * West-bound Longitude: 6.139200 * North-bound Latitude: 75.543800 * East-bound Longitude: 15.851000
Date/Time Start: 2007-09-19T07:27:00 * Date/Time End: 2008-08-19T10:40:00
Minimum ELEVATION: -2570 m a.s.l. * Maximum ELEVATION: -325 m a.s.l.
Event(s):
9C_OBS01 * Latitude: 75.543800 * Longitude: 15.135800 * Date/Time Start: 2007-09-26T08:23:56 * Date/Time End: 2008-08-16T06:58:00 * Elevation: -325.0 m * Location: Fram Strait * Method/Device: Ocean bottom seismometer (OBS)
9C_OBS02 * Latitude: 75.251500 * Longitude: 13.333500 * Date/Time Start: 2007-09-26T11:36:18 * Date/Time End: 2008-08-16T11:35:00 * Elevation: -1673.0 m * Location: Fram Strait * Method/Device: Ocean bottom seismometer (OBS)
9C_OBS04 * Latitude: 74.682800 * Longitude: 15.851000 * Date/Time Start: 2007-09-29T20:15:00 * Date/Time End: 2008-04-04T07:19:35 * Elevation: -2076.0 m * Location: Fram Strait * Method/Device: Ocean bottom seismometer (OBS)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Schweitzer, Johannes | |||
| 2 | Project | Project | Schweitzer, Johannes | |||
| 3 | Principal investigator | PI | Schweitzer, Johannes | |||
| 4 | Code | Code | Schweitzer, Johannes | FDSN Network Code | ||
| 5 | Station label | Station | Schweitzer, Johannes | |||
| 6 | Date/time start | Date/time start | Schweitzer, Johannes | Synchronisation | ||
| 7 | Date/time start | Date/time start | Schweitzer, Johannes | Recording | ||
| 8 | Date/time start | Date/time start | Schweitzer, Johannes | Deployment | ||
| 9 | LATITUDE | Latitude | Schweitzer, Johannes | Geocode | ||
| 10 | LONGITUDE | Longitude | Schweitzer, Johannes | Geocode | ||
| 11 | ELEVATION | Elevation | m a.s.l. | Schweitzer, Johannes | Geocode | |
| 12 | Date/time end | Date/time end | Schweitzer, Johannes | Recovery | ||
| 13 | Date/time end | Date/time end | Schweitzer, Johannes | Recording | ||
| 14 | Date/time end | Date/time end | Schweitzer, Johannes | Synchronistaion | ||
| 15 | Clock skew | Skew | µs | Schweitzer, Johannes | ||
| 16 | Recorder type | Recorder | Schweitzer, Johannes | |||
| 17 | Recorder, serial number | Recorder SN | Schweitzer, Johannes | |||
| 18 | Seismometer type | Seismometer | Schweitzer, Johannes | |||
| 19 | Seismometer, serial number | Seismometer SN | Schweitzer, Johannes | |||
| 20 | Seismometer gain | Seismometer gain | Schweitzer, Johannes | |||
| 21 | Hydrophone type | Hydrophone | Schweitzer, Johannes | |||
| 22 | Hydrophone, serial number | Hydrophone SN | Schweitzer, Johannes | |||
| 23 | Hydrophone gain | Hydrophone gain | Schweitzer, Johannes | |||
| 24 | Hydrophone polarity | Hydrophone pol | Schweitzer, Johannes | |||
| 25 | Sampling rate | Sampling rate | Hz | Schweitzer, Johannes | ||
| 26 | Comment | Comment | Schweitzer, Johannes | |||
| 27 | Binary Object | Binary | Schweitzer, Johannes | Auxiliary data | ||
| 28 | Binary Object | Binary | Schweitzer, Johannes | Log file | ||
| 29 | Binary Object | Binary | Schweitzer, Johannes | Raw data |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
237 data points
Data
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| 1 Event | 2 Project | 3 PI | 4 Code (FDSN Network Code) | 5 Station | 6 Date/time start (Synchronisation) | 7 Date/time start (Recording) | 8 Date/time start (Deployment) | 9 Latitude | 10 Longitude | 11 Elevation [m a.s.l.] | 12 Date/time end (Recovery) | 13 Date/time end (Recording) | 14 Date/time end (Synchronistaion) | 15 Skew [µs] | 16 Recorder | 17 Recorder SN | 18 Seismometer | 19 Seismometer SN | 20 Seismometer gain | 21 Hydrophone | 22 Hydrophone SN | 23 Hydrophone gain | 24 Hydrophone pol | 25 Sampling rate [Hz] | 26 Comment | 27 Binary (Auxiliary data) | 28 Binary (Log file) | 29 Binary (Raw data) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 9C_OBS01 | BEAR ISLAND | J. Schweitzer | 9C | OBS01 | 2007-09-22T07:34:32 | 2007-09-22T07:35:22 | 2007-09-26T08:23:56 | 75.5438 | 15.1358 | -325 | 2008-08-16T06:58:00 | 2008-08-16T08:44:49 | 2008-08-16T08:45:14 | 1479437 | MCS | 060738 | Güralp CMG-40T 60s | T4L91 | 1 | HTI-01-PCA/ULF | 31208005 | 4 | Normal | 50 | 9C.OBS01.aux | 9C.OBS01.log | 9C.OBS01.mcs | |
| 9C_OBS02 | BEAR ISLAND | J. Schweitzer | 9C | OBS02 | 2007-09-22T09:44:50 | 2007-09-22T09:46:35 | 2007-09-26T11:36:18 | 75.2515 | 13.3335 | -1673 | 2008-08-16T11:35:00 | 2008-08-09T14:30:48 | MCS | 060753 | Güralp CMG-40T 60s | T4M04 | 1 | HTI-01-PCA/ULF | 31207005 | 4 | Normal | 50 | No skew available | 9C.OBS02.aux | 9C.OBS02.log | 9C.OBS02.mcs | ||
| 9C_OBS04 | BEAR ISLAND | J. Schweitzer | 9C | OBS04 | 2007-09-27T07:20:52 | 2007-09-27T07:22:32 | 2007-09-29T20:15:00 | 74.6828 | 15.8510 | -2076 | 2008-04-04T07:19:35 | MCS | 060742 | Güralp CMG-40T 60s | T4K83 | 1 | HTI-01-PCA/ULF | 312103 | 4 | Normal | 50 | No skew available | 9C.OBS04.aux | 9C.OBS04.log | 9C.OBS04.mcs | |||
| 9C_OBS05 | BEAR ISLAND | J. Schweitzer | 9C | OBS05 | 2007-09-27T07:30:19 | 2007-09-27T07:31:30 | 2007-09-30T00:35:00 | 74.2712 | 13.7867 | -2076 | 2008-08-18T07:10:00 | 2008-08-18T08:56:17 | 2008-08-18T08:56:26 | -21094 | MCS | 060736 | Güralp CMG-40T 60s | T4K96 | 1 | HTI-04-PCA/ULF | 312092 | 4 | Normal | 50 | 9C.OBS05.aux | 9C.OBS05.log | 9C.OBS05.mcs | |
| 9C_OBS06 | BEAR ISLAND | J. Schweitzer | 9C | OBS06 | 2007-09-18T20:24:38 | 2007-09-18T21:41:10 | 2007-09-19T07:27:00 | 74.2268 | 8.2970 | -2400 | 2008-08-17T06:55:00 | 2008-08-17T08:38:40 | 2008-08-17T08:38:59 | 1515406 | MCS | 060729 | Güralp CMG-40T 60s | T4L36 | 1 | HTI-01-PCA/ULF | 31206905 | 4 | Normal | 50 | 9C.OBS06.aux | 9C.OBS06.log | 9C.OBS06.mcs | |
| 9C_OBS07 | BEAR ISLAND | J. Schweitzer | 9C | OBS07 | 2007-09-27T07:38:17 | 2007-09-27T07:39:07 | 2007-09-30T05:00:00 | 73.8618 | 11.6445 | -2150 | 2008-08-18T02:05:00 | 2008-08-18T03:34:35 | 2008-08-18T03:56:06 | 55843 | MCS | 060730 | Güralp CMG-40T 60s | T4K87 | 1 | HTI-04-PCA/ULF | 312093 | 4 | Invertiert | 50 | 9C.OBS07.aux | 9C.OBS07.log | 9C.OBS07.mcs | |
| 9C_OBS08 | BEAR ISLAND | J. Schweitzer | 9C | OBS08 | 2007-09-22T11:37:14 | 2007-09-22T11:38:20 | 2007-09-25T18:40:00 | 73.7317 | 15.5645 | -450 | 2008-08-18T15:10:00 | 2008-08-18T16:30:34 | 2008-08-18T16:30:48 | 152562 | MCS | 060748 | Güralp CMG-40T 60s | T4L29 | 1 | HTI-04-PCA/ULF | 312094 | 4 | Normal | 50 | 9C.OBS08.aux | 9C.OBS08.log | 9C.OBS08.mcs | |
| 9C_OBS09 | BEAR ISLAND | J. Schweitzer | 9C | OBS09 | 2007-09-19T11:26:21 | 2007-09-19T11:27:46 | 2007-09-19T13:12:00 | 73.6858 | 6.1392 | -2570 | 2008-08-17T12:50:00 | 2008-08-17T14:48:57 | 2008-08-17T14:49:13 | 1298531 | MCS | 060728 | Güralp CMG-40T 60s | T4L34 | 1 | HTI-04-PCA/ULF | 312109 | 4 | Normal | 50 | 9C.OBS09.aux | 9C.OBS09.log | 9C.OBS09.mcs | |
| 9C_OBS11 | BEAR ISLAND | J. Schweitzer | 9C | OBS11 | 2007-09-19T21:42:59 | 2007-09-19T21:44:06 | 2007-09-20T08:10:23 | 73.0835 | 13.0265 | -1200 | 2008-08-19T10:40:00 | 2008-08-19T11:47:33 | 2008-08-19T11:47:43 | 245656 | MCS | 060735 | Güralp CMG-40T 60s | T4K93 | 1 | HTI-04-PCA/ULF | 312100 | 4 | Invertiert | 50 | 9C.OBS11.aux | 9C.OBS11.log | 9C.OBS11.mcs | |
| 9C_OBS12 | BEAR ISLAND | J. Schweitzer | 9C | OBS12 | 2007-09-20T09:19:55 | 2007-09-20T09:21:45 | 2007-09-20T12:26:50 | 72.8503 | 15.1378 | -473 | 2008-08-19T06:25:00 | 2008-08-19T07:09:54 | 2008-08-19T07:09:59 | 2517093 | MCS | 060734 | Güralp CMG-40T 60s | T4K85 | 1 | HTI-04-PCA/ULF | 312107 | 4 | Normal | 50 | 9C.OBS12.aux | 9C.OBS12.log | 9C.OBS12.mcs |