Schlindwein, Vera; Schmidt-Aursch, Mechita (2022): Project SWEAP: DEPAS ocean-bottom seismometer operations at the Southwest Indian Ridge in 2012-2013. GFZ Data Services. Other/Seismic Network. doi:10.14470/7R7567193925.
Southwest Indian Ridge Earthquakes and Hydrothermal Plumes (SWEAP)
Project SWEAP (Southwest Indian Ridge Earthquakes and Plumes), a collaborative effort led by the Alfred-Wegener-Institute, installed a network of 10 broad-band ocean bottom seismometers (OBS) along the ultraslow-spreading Oblique Supersegment of the Southwest Indian Ridge. The presented data set covers the continuous records of 8 stations of the network provided by the DEPAS instrument pool. One station of the original network could not be recovered, another one did not return data. The instruments were spaced at roughly 15 km intervals in a triangular shape network to either side of the rift axis covering about 60 km along axis between 13°E and 13.8°E and 60 km across axis between 52°S and 52.6°S. The determination of the OBS positions is described by Schmid et al. (2016). The network design was optimized for detecting and locating deep seismicity in the area. The rift valley was filled with soft silica ooze, producing considerable delay of S-phases at selected stations. Instrument deployment started during RV Polarstern cruise ANT-XXIX/2 on December 05 2012. Instrument recovery was completed during RV Polarstern cruise ANT-XXIX/8 on November 26 2013. 5 Refraction seismic lines were acquired by RV Polarstern cruise ANT-XXIX/8 from November 17 to 19 in 2013. All OBS could be synchronized with the GPS clock upon recovery such that skew values describing the clock drift are available for all stations. The non-linear clock drift of station SWE05 was determined by means of noise cross-correlations and applied to the data set. All other stations show a linear drift, which was corrected.
* Description is taken from seismic metadata, and may not match the preferred title for citations.
Alfred Wegener Institute (AWI), Bremerhaven, Germany
Schlindwein, Vera; Schmidt-Aursch, Mechita (2021). Project SWEAP: DEPAS ocean-bottom seismometer operations at the Southwest Indian Ridge in 2012-2013. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA. doi:10.1594/PANGAEA.932358
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
Schmid, Florian; Schlindwein, Vera (2016). Microearthquake activity, lithospheric structure, and deformation modes at an amagmatic ultraslow spreading Southwest Indian Ridge segment. AGU, Volume 17, Issue 7, Pages 2905-2921. doi:10.1002/2016GC006271
Schlindwein, V. (2014). The expedition of the research vessel "Polarstern" to the Antarctic in 2013 (ANT-XXIX/8) / Ed. by Vera Schlindwein with contributions of the participants. Berichte zur Polar- und Meeresforschung = Reports on polar and marine research, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research, 672 , 111 p. doi:10.2312/BzPM_0672_2014
Boebel, O. (2013). The expedition of the research vessel "Polarstern" to the Antarctic in 2012/2013 (ANT-XXIX/2). Berichte zur Polar- und Meeresforschung = Reports on polar and marine research, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research, 671 , 99 p. doi:10.2312/BzPM_0671_2013