Infragravity wave source regions determined from ambient noise correlation
Harmon, Nicholas, Henstock, Timothy J., Srokosz, Meric, Tilmann, Frederik, Rietbrock, Andreas and Barton, Penny (2012) Infragravity wave source regions determined from ambient noise correlation. Geophysical Research Letters, 39, L04604. (doi:10.1029/2011GL050414 ).
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We use a backprojection method to determine dominant directions of ocean infragravity waves from 60–200 s period from cross correlations between 5 ocean bottom differential pressure gauges located off the coast of Sumatra. We observe infragravity waves arriving from all directions, but there is a dominant source direction that represents coherent propagation along the coast from the southeast or from the south. This study demonstrates the effectiveness of our projection technique, which may be applied to past and future seismic data to improve models of ocean infragravity wave generation and tsunami propagation.
|Subjects:||G Geography. Anthropology. Recreation > GC Oceanography|
|Divisions:||Faculty of Natural and Environmental Sciences > Ocean and Earth Science > Geology & Geophysics
National Oceanography Centre (NERC) > Marine Physics and Ocean Climate
|Date Deposited:||01 Mar 2012 15:01|
|Last Modified:||28 Feb 2014 17:00|
Subduction zone segmentation and controls on earthquake rupture: The 2004 and 2005 Sumatra earthquakes
Funded by: NERC (NE/D004381/1 - £464,132)
Led by: Timothy Henstock
1 December 2006 to 30 September 2015
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