Project DICTUM: DEPAS ocean-bottom seismometer and acoustic doppler current meter operations in the North Sea

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Cite as
Fadel, Islam; Akinremi, Stephen; Schmidt-Aursch, Mechita; Kirk, Henning; van Wettum, Arie; Thomas, Christine; Ruigrok, Elmer (2026): Project DICTUM: DEPAS ocean-bottom seismometer and acoustic doppler current meter operations in the North Sea. GFZ Data Services. Dataset/Seismic Network. https://doi.org/10.7914/SN/NR.
Identifier
10.7914/SN/NR
DataCite metadata
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Terms/rights
Creative Commons Attribution 4.0 International CC-BY-4.0 Request access
Creator(s)
orcid:0000-0002-0091-8175 Fadel, Islam a; orcid:0000-0001-9162-7156 Akinremi, Stephen a; orcid:0000-0002-2393-4514 Schmidt-Aursch, Mechita b; Kirk, Henning b; van Wettum, Arie c; orcid:0000-0002-7845-5385 Thomas, Christine d; orcid:0000-0001-7153-5115 Ruigrok, Elmer c
a Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Enschede, The Netherlands
b Alfred Wegener Institute for Polar and Marine Research
c Department of Earth Sciences, Utrecht University, Utrecht, The Netherlands
d Institute of Geophysics, University of Münster, Münster, Germany
Description
  • (Abstract) n this experiment, we evaluated the deployment of a sea bottom seismological station in shallow waters to investigate the influence of the marine environmental dynamics on the sensor performance. The test site was located approximately 70 m offshore of Texel Island, the Netherlands. A novel station design was developed to withstand the challenging shallow-water conditions, including strong sediment dynamics, tidal currents, and intense biological activity. The system incorporated one seismometer (Trillium Compact 120 s) and two hydrophones (HTI-04-PCA/ULF, 100 sec - 8 kHz) to monitor pressure variations. The data was recorded by two KUM 6D6 data loggers. An acoustic doppler current meter (Aanderaa RCM11) was used to characterize current dynamics associated with the recorded seismological signals. In addition, dedicated metal anchoring weights were installed to stabilize the sensor frame against sediment movement and shifting seabed conditions. The newly developed system was deployed for a two-month period between July and September 2022. To complement the offshore deployment, two land-based reference stations were operated simultaneously: one located directly onshore near the marine station (Centaur 4 data logger, Trillium Posthole 120s) and another situated several kilometers inland on Texel Island (Taurus data logger, Trilium120s). The purpose of these co-located onshore stations was to isolate and identify the environmental factors specific to the marine setting that could influence the performance of the offshore station. This data set contains the time-corrected seismometer data. Waveform data is available from the GEOFON data centre, under network code NR.
Title
Project DICTUM: DEPAS ocean-bottom seismometer and acoustic doppler current meter operations in the North Sea
Publisher
GFZ Data Services
Publication year
2026
Resource type
Dataset / Seismic Network
Dates
  1. Collected
  2. Accepted
  3. Submitted
  4. Issued
  5. Created
  6. Available
Place(s)
  1. North Sea
Contributor(s)
  • Hosting institution: GFZ Helmholtz-Zentrum für Geoforschung
  • Data manager: GEOFON Data Centre
  • Project leader: University of Twente
  • Project members: University of Twente; AWI; Utrecht University; University of Münster; KNMI; NIOZ
Subjects
Funding reference(s)
  1. Dutch Research Council (NWO) (DEEP.NL.2020.010 )
Language
en
Sizes
  1. ~300GB
Reference(s)
  1. (Documented by) Schmidt-Aursch, Mechita; Haberland, Christian (2017). DEPAS (Deutscher Geräte-Pool für amphibische Seismologie): German Instrument Pool for Amphibian Seismology. Journal of large-scale research facilities JLSRF, https://doi.org/10.17815/jlsrf-3-165
FDSN network code
NR
Network dates
1983–
Data time range
2022–
Station count
3
Seismic metadata
fdsnws-station

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Station List for Network Code NR

Code
Station description
Begin
End
Loc
Channels
Flags
NE400
Texel DICTUM station R
--
--
HH*
RAi
NE401
Texel Airport DICTUM station R
--
HH*
RAi
NS400
DICTUM Station NS400 R
00
HDH HH*
RAi
01
HDH
RAi
Access to some stations/channels shown here is restricted. Access information.
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