Scheduled Cruises in 2005
Summary of a cruise on margins research (D.051)
SW of Sumatra, Indonesia in the area of the 26 December 2004 earthquake
and tsunami
HMS Scott
23rd January 2005 from : Singapore
18th February 2005 from : Singapore
25 days
Lisa McNeill (SOC), Tim Henstock (SOC), David Tappin (BGS)
School of Ocean and Earth Science, Southampton Oceanography Centre, (SOC)
The main objectives were :
- To acquire high resolution swath bathymetric data
over that part of the area of the main fault rupture of the 26th
December 2004 earthquake that lies in Indonesian waters.
- To seek for and identify evidence of relatively
recent seabed movement (slumps, slides, faults and folds) as targets
for future study.
- To provide baseline data for further studies using
other types of equipment.
- To test for differences in margin structure and
morphology along and across strike.
- To search for differences in structure in the south
of the area across a possible major segment boundary, where the
earthquake rupture is believed to have terminated.
During the 20-day cruise swath bathymetry data were acquired over more
than 8000 km along track, covering
an estimated area of approximately 40,000 square kilometres over the
southern part of the December 26,
2004 earthquake rupture zone.
During the survey, HMS Scott visited the main sections of the
subduction zone forearc, including the
plate boundary and accretionary wedge, the forearc high and forearc
basin.
It also transited across parts of the Great Sumatran Fault.
In the context of the international response to the earthquake and
tsunami, the onboard scientists
endeavoured to inform the scientific community of their progress by
providing bulletins and selected
images of representative features revealed for the first time.
They look forward to presenting the results and their interpretations
of the data in their full context.
For an image containing ship track and survey area
information please click - here.
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