Sumatran Segmentation Geophysical Data Set, 2008 - 2009

The data set comprises of geophysical observations in the source regions of the 2004 and 2005 great Sumatra earthquakes. Geophysical surveys were carried out to determine the seabed bathymetry and underlying structure and geometry and included the collection of seismic reflection, magnetic, gravity, and sidescan sonar data. In addition, Conductivity-Temperature-Depth (CTD) and Sound-Velocity Probe (SVP) data were collected, as well as continuous meteorological (air pressure, air temperature, radiance, relative humidity, wind direction and speed) and sea surface (temperature and conductivity) data. Data were collected in the Indian Ocean, west and north west of Sumatra between 8 degrees South, 6 degrees North, 94 and 108 degrees East. The data were collected during three cruises, SO198-1, SO198-2 and SO200 over two legs SO200-1 and SO200-2. The three cruises took place between May 2008 and February 2009. The data collection focussed on the areas around two earthquake segment boundaries: Segment Boundary 1 (SB1) between the 2004 and 2005 ruptures at Simeulue Island, and Segment Boundary 2 (SB2) between the 2005 and smaller 1935 ruptures between Nias and the Batu Islands. Measurements were taken using a variety of instrumentation across all three cruises including: the long-term deployment of 50 Ocean-Bottom Seismometers (OBS) deployed on cruise SO198-1 and retrieved on cruise SO200-1; 154 Expendable Bathythermograph (XBT) probes; high resolution multichannel seismic reflection (MCS) profilers; Swath bathymetric and backscatter echosounders; SVPs and CTDs which were deployed simultaneously; and a gravity meter and Parasound sub-bottom profiler were operated continuously within the survey areas. In addition, sea surface and meteorological measurements were made using the underway system throughout the three cruises, although there are no data for days at the beginning and end of the cruises of up to 10 days. During the two legs of SO200 additional instrumentation was deployed including: a 30 kHz deep-towed sidescan sonar system (TOBI); piston cores and megacores collected along the plate margin; and heatflow probes long transects. The UK Sumatra Consortium project aimed to characterise the subduction boundary between the Indian-Australian plate and the Burman and Sumatra blocks (including subduction zone structure and rock physical properties), record seismic activity, improve and link earthquake slip distribution to the structure of the subduction zone and to determine the sedimentological record of great earthquakes (both recent and historic) along this part of the plate margin. The project will allow better assessment of future earthquake magnitudes and locations, and further the general understanding of the earthquake rupture process. The UK Sumatra Consortium project was led by the National Oceanography Centre Southampton (NOCS) and involved five UK partners; NOCS, the universities of Cambridge, Oxford and Liverpool, and the British Geological Survey as well as numerous international partners including French, German, American, Indonesian and Indian Collaborators. The principal investigator was Dr Timothy Henstock from NOC. The Natural Environment Research Council (NERC) funded data will be managed by the British Oceanographic Data Centre (BODC).

Simple

Alternate title

British Oceanographic Data Centre record 1048SUMATRA
Date (Publication)
2018-05-18
Date (Creation)
2013-03-25
Date (Revision)
2013-04-26
Citation identifier
http://www.bodc.ac.uk/ / EDMED5914
Point of contact
Organisation name Individual name Electronic mail address Role

British Oceanographic Data Centre

Unknown

enquiries@bodc.ac.uk

Originator

British Oceanographic Data Centre

enquiries@bodc.ac.uk

Custodian
Maintenance and update frequency
As needed

SeaDataNet PDV

Vertical Coverages

MEDIN metadata record availability

INSPIRE themes
Use limitation

Usage restrictions are specified in the terms of the licence
Use limitation

No conditions apply
Access constraints
Other restrictions
Other constraints

Data are freely available
Language
English
Topic category
  • Oceans
  • Climatology, meteorology, atmosphere
  • Geoscientific information
  • Location
N
S
E
W
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Begin date
2008-05-03
End date
2009-02-11
Reference system identifier
OGP / urn:ogc:def:crs:EPSG::4326
Distribution format
    Distributor contact
    Organisation name Individual name Electronic mail address Role

    British Oceanographic Data Centre

    enquiries@bodc.ac.uk

    		Distributor
    OnLine resource
    Protocol Linkage Name
    https://www.bodc.ac.uk/

    Dataset Web Site
    Hierarchy level
    Dataset
    Statement

    Instrument(s) used to collect data: meteorological packages; bathythermographs; sidescan sonars; single-channel seismic reflection systems; multi-beam echosounders; gravimeters; magnetometers; sound velocity sensors; seismometers; >2000 Hz top-bandwidth single-channel seismic reflection systems; unconsolidated sediment corers; CTD; satellite positioning systems; water temperature sensor.

    Metadata

    File identifier
    0a45dfb8938f5be7b58b46b47a165fec XML
    Metadata language
    English
    Hierarchy level
    Dataset
    Date stamp
    2018-05-18T15:37:44
    Metadata standard name

    MEDIN Discovery Metadata Standard
    Metadata standard version

    Version 2.3.8
    Metadata author
    Organisation name Individual name Electronic mail address Role

    British Oceanographic Data Centre

    Polly Hadžiabdić

    enquiries@bodc.ac.uk

    		Point of contact
     
     

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