Deutsches Ozeanographisches
Datenzentrum Inventur der Sonne-Reise SO244-1 (DOD-Ref-No.20150122)
Inventory of Sonne Cruise SO244-1 (DOD-Ref-No.20150122)

Plattform
Platform
Reise-Nr.
Cruise-No.
Zeitraum
Period
Projekt
Project
Arbeitsgebiet
Working area
Sonne SO244-1 30.10.2015 - 24.11.2015 SO244 GEOSEA
 
SE Pacific (Limit 140W)  

Fahrtleiter
Chief Scientist
Institut
Institute
Auslaufhafen
Port of departure
Einlaufhafen
Port of return
Stationskarte
Station map
Schiffsroute
Trackchart
Behrmann Jan GEOMAR Helmholtz-Zentrum fur Ozeanforschung Kiel Antofagasta Antofagasta   

Ziel der Reise / Objectives of Cruise:

The majority of M>8.5 active plate boundary earthquakes has hypocenters located beneath the oceans in subduction zones. Post-hoc analysis shows that most of the surface deformation related to co-seismic stress release takes place on the seafloor, in many cases unleashing major tsunamis. The structure and morphology of the seafloor and shallow subbottom thus stores crucial information on sub-seafloor processes, such as permanent deformation by seismic slip or aseismic creep within the overriding plate and earthquake and tsunami generation. We have mapped the seafloor seaward of the Northern Chilean coast between about 19?S and 22?S down to the Northern Chile trench, using the ship-based Multibeam Echosounder EM122, Parasound, and AUV (autonomous underwater vehicle) – in selected subareas - at sufficient resolution to identify active tectonic fault structures and submarine mass wasting structures, to quantitatively assess young and active deformation of the overriding plate in the area, and quantify the extent of recent catastrophic downslope mass movements of sediment. Furthermore, the investigations serve as a site survey for the deployment of the GEOSEA seafloor geodetic array. The investigations were made timely by the 1st April 2014 Pisagua M=8.2 earthquake, that ruptured the plate interface in the northern part of the area of investigation. The central and southern parts are located in the last remaining locked seimotectonic segment along the Chilean active margin. In addition to providing the first data base for geomorphological and tectonic interpretation of geo-processes at the seafloor, the bathymetric mapping done during SO244 Leg 1 will provide an important data reference for possible post-earthquake surveys once this seismotectonic segment will have broken in the future.

Messungen / Measurements

Institut
Institute
Wissenschaftler
Scientist
Anzahl
Number
Einheit
Unit
Typ der Messungen
Type of measurements
Kommentar
Comments
Daten im DOD
Data in DOD
GEOMAH Behrmann Jan 5089 km G74
Multi-beam echosounding
EM122. no
GEOMAH Behrmann Jan 1 n miles G90
Other geological or geophysical measurements
EM 122, Parasound yes
GEOMAH Behrmann Jan 15 diving(s) G90
Other geological or geophysical measurements
AUV. no
GEOMAH Behrmann Jan 2 stations H10
CTD-Stations
CTD measured to 2500 m water depth. no
GEOMAH Behrmann Jan 1 n miles H80
Other physical measurements
Underway measurements during the whole trip such as coordinates, depth, meteorological parameter and so on yes

Verankerungen / Moorings

Institut
Institute
Wissenschaftler
Scientist
Typ der Messungen
Type of measurements
Kommentar
Comments
geogr.Breite
Latitude
geogr.Länge
Longitude
Daten im DOD
Data in DOD
GEOMAH Lange Dietrich G76 Ocean Bottom Seismometer, acoustic waves, 1, recovered Nov 2015 21° 45.0' S 70° 48.2' W no
GEOMAH Lange Dietrich G76 Ocean Bottom Seismometer, acoustic waves, 1, recovered Nov 2015 21° 21.0' S 70° 58.2' W no
GEOMAH Lange Dietrich G76 Ocean Bottom Seismometer, acoustic waves, 1, recovered Nov 2015 21° 20.1' S 70° 39.0' W no
GEOMAH Lange Dietrich G76 Ocean Bottom Seismometer, acoustic waves, 1, recovered Nov 2015 20° 60.0' S 70° 49.0' W no
GEOMAH Lange Dietrich G76 Ocean Bottom Seismometer, acoustic waves, 1, recovered Nov 2015 20° 45.1' S 70° 59.7' W no
GEOMAH Lange Dietrich G76 Ocean Bottom Seismometer, acoustic waves, 1, recovered Nov 2015 20° 44.9' S 70° 42.1' W no
GEOMAH Lange Dietrich G76 Ocean Bottom Seismometer, acoustic waves, 1, recovered Nov 2015 20° 30.0' S 70° 51.0' W no
GEOMAH Lange Dietrich G76 Ocean Bottom Seismometer, acoustic waves, 1, recovered Nov 2015 20° 15.0' S 71° 1.8' W no
GEOMAH Lange Dietrich G76 Ocean Bottom Seismometer, acoustic waves, 1, recovered Nov 2015 20° 15.0' S 70° 42.0' W no
GEOMAH Lange Dietrich G76 Ocean Bottom Seismometer, acoustic waves, 1, recovered Nov 2015 20° 0.6' S 70° 52.8' W no
GEOMAH Lange Dietrich G76 Ocean Bottom Seismometer, acoustic waves, 1, recovered Nov 2015 19° 45.0' S 71° 10.0' W no
GEOMAH Lange Dietrich G76 Ocean Bottom Seismometer, acoustic waves, 1, recovered Nov 2015 19° 45.0' S 70° 45.2' W no
GEOMAH Lange Dietrich G76 Ocean Bottom Seismometer, acoustic waves, 1, recovered Nov 2015 19° 30.0' S 70° 60.0' W no
GEOMAH Lange Dietrich G76 Ocean Bottom Seismometer, acoustic waves, 1, recovered Nov 2015 19° 21.0' S 71° 21.0' W no
GEOMAH Lange Dietrich G76 Ocean Bottom Seismometer, acoustic waves, 1, recovered Nov 2015 19° 6.0' S 70° 54.2' W no
13.4.2019