GEOFON 8F Seismic Network

The 8F Seismic Network, 2018–2019

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Network list

Cite as:: Schlindwein, Vera; Kirk, Henning; Hiller, Marc; Scholz, John-Robert; Schmidt-Aursch, Mechita (2022): GAKKELDEEP: DEPAS ocean-bottom seismometer operations at the Gakkel Ridge in 2018-2019. GFZ Data Services. Other/Seismic Network. doi:10.14470/3S7563492742.
Network code:: 8F
Type:: Temporary
Network dates^†:: 2018-01-01 to 2019-12-31
Data time range^‡:: 2018–2019
Terms of use:: Creative Commons Attribution 4.0 International Embargoed Available 2025-06-01. Request access
Institution(s):: Alfred-Wegener-Institut, Bremerhaven
Creator(s):: Schlindwein, Vera; Kirk, Henning; Hiller, Marc; Scholz, John-Robert; Schmidt-Aursch, Mechita (LEGACY)
Description*:: GAKKELDEEP: DEPAS ocean-bottom seismometer operations at the Gakkel Ridge in 2018-2019
Abstract:: Gakkel Deep is a pilot project that installed a network of four broadband ocean bottom seismometers (OBS) near Gakkel Deep, the deepest depression in the Arctic Ocean, at the eastern end of the ultraslow spreading Gakkel Ridge. The area is covered year-round by sea ice. In order to enable a safe recovery of the OBS in a sea ice covered ocean, the OBS were modified to include a positioning system that allows to track the instruments at meter accuracy during descent and ascent and when stuck beneath ice floes. This pilot studied aimed at testing the recovery procedure of the OBS, checking the performance of the modified instrument design, getting an overview of ambient seismic noise at the bottom of the Arctic Ocean and at contributing to a better understanding of the origin of the Gakkel Deep depression with more than 3000 m of topography. The network is shaped as a rectangle with 8 km and 10 km side length and is centered at about 82°N 119.5°E at water depths between 3600 m and 4100 m. It is positioned slightly to the east of the present plate boundary in an area with volcanic structures. Instruments from the German Instrument Pool of Amphibian Seismology (DEPAS) were deployed during RV Polarstern cruise PS115/2 on September 15, 2018. Instrument recovery was completed during RV Polarstern cruise PS122/1 on September 27, 2019. The data set contains about 377 days of continuous records at 250 Hz sample rate. The station locations were determined with Ultra Short Baseline (USBL) ranging, the accuracy is approx. 10 m. The non-linear clock drift was determined by means of noise cross-correlations and applied to the data set.

* Description is taken from seismic metadata, and may not match the preferred title for citations.
DataCite metadata:: HTML | JSON | XML | INSPIRE
Seismic metadata:: fdsnws-station
Funder:: AWI
Network KML file:

To retrieve waveform data and metadata (including instrument responses) for this and other seismic networks, see here.

Extended Network Information for network 8F _[hide/show]

Creator(s):

Schlindwein, Vera ^a; Kirk, Henning ^a; Hiller, Marc ^a;

Scholz, John-Robert ^a;

Schmidt-Aursch, Mechita ^a
^a Alfred Wegener Institute for Polar and Marine Research

Title:

GAKKELDEEP: DEPAS ocean-bottom seismometer operations at the Gakkel Ridge in 2018-2019

Publisher:

GFZ Data Services

Resource Type:

Other/Seismic Network

Network DOI:

doi:10.14470/3S7563492742

Related Reference(s):

Schlindwein, Vera; Kirk, Henning; Hiller, Marc; Scholz, John-Robert; Schmidt-Aursch, Mechita (2022). Project GAKKELDEEP: DEPAS ocean-bottom seismometer operations at the Gakkel Ridge in 2018-2019. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA. doi:10.1594/PANGAEA.947045
Crawford, Wayne (2021). obsinfo. Python standalone application for creating FDSN-standard (StationXML).
Crawford, Wayne (2019). OBS data/metadata proposal.
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. doi:10.17815/jlsrf-3-165