Determination of the Rupture History of Large Earthquakes from Analysis of Broad Band Seismograms

A complete picture of the processes occurring on seismically active faults is the essential prerequisite for the reliable assessment and mitigation of earthquake hazards. But earthquake parameters vary greatly over the fault in large earthquakes. For example, earthquake fault slip can range from 1-15 metres on different portions of the fault for any earthquake. Further slow slip has also been observed after a recent earthquake. In addition, earthquake damage depends directly on the speed at which the Earth's crust fractures. Our earlier studies showed that it is possible for this rupture velocity to be very high on some portions of the fault. Thus, sites close to regions of higher rupture velocity would be damaged more than other regions. Advance knowledge of such sites, based on earthquakes that have already occurred, is invaluable for making decisions on siting of critical structures (for example, dams, bridges, power plants, etc.). This proposal aims to quantify the distribution of slip, rupture speed, stress drops, and other fundamental source characteristics over the fault for several recent large earthquakes, by analysing seismograms. The results will also be used to increase our understanding of active tectonic areas. The relevant equations will be solved using a massively parallel computer cluster. The recent occurrence of several large earthquakes makes this investigation timely.

Date (Creation): 2005-10-01

Citation identifier: http://data.bgs.ac.uk/id/dataHolding/13605353

Point of contact

Organisation name	Individual name	Electronic mail address	Role
University of Oxford	Das, Dr S	not available	Principal investigator
British Geological Survey	Enquiries	enquiries@bgs.ac.uk	Distributor
British Geological Survey	Enquiries	enquiries@bgs.ac.uk	Point of contact

Maintenance and update frequency: notApplicable

GEMET - INSPIRE themes, version 1.0

Geology

BGS Thesaurus of Geosciences

Chemistry
Natural hazards
Tectonics
NGDC Deposited Data
Physics

dataCentre

NGDC Deposited Data

Keywords

NERC_DDC

Access constraints: Other restrictions

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Use constraints: Other restrictions

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Other constraints: Either: (i) the dataset is made freely available, e.g. via the Internet, for a restricted category of use (e.g. educational use only); or (ii) the dataset has not been formally approved by BGS for access and use by external clients under licence, but its use may be permitted under alternative formal arrangements; or (iii) the dataset contains 3rd party data or information obtained by BGS under terms and conditions that must be consulted in order to determine the permitted usage of the dataset. Refer to the BGS staff member responsible for the creation of the dataset if further advice is required. He / she should be familiar with the composition of the dataset, particularly with regard to 3rd party IPR contained in it, and any resultant use restrictions. This staff member should revert to the IPR Section ( ipr@bgs.ac.uk) for advice, should the position not be clear.

Language: English

Topic category

Geoscientific information

Geographic identifier: ANDAMAN ISLANDS [id=923500]
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation

Geographic identifier: JAPAN [id=540000]
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation

Geographic identifier: JP
ISO 3166_1 alpha-2 2009 revision

Geographic identifier: JPN
ISO 3166_1 alpha-3 2009 revision

Geographic identifier: PE
ISO 3166_1 alpha-2 2009 revision

Geographic identifier: PER
ISO 3166_1 alpha-3 2009 revision

Geographic identifier: PERU [id=864000]
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation

Geographic identifier: SUMATRA [id=562000]
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation

Geographic identifier: XIZANG [id=512000]
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation

Begin date: 2005-10-01

End date: 2009-03-31

Supplemental Information: NE/C518806/1

Reference System Information

No information provided.

Distribution format

Name	Version
Tabular Data Files	witheld

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey	Enquiries	enquiries@bgs.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
WWW:LINK-1.0-http--link	https://www.bgs.ac.uk/	BGS Homepage

Hierarchy level: Dataset

Conformance result

Title: INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology

Date (Publication): 2011

Explanation: See the referenced specification

Pass: No

Conformance result

Title: Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services