Reference System

MD_ReferenceSystem:

referenceSystemIdentifier:

RS_Identifier:

code:

http://www.opengis.net/def/crs/EPSG/0/32611

code:

WGS 84 / UTM zone 11N (EPSG::32611)

Identification

Data Identification:

citation:

Citation:

Title:

Processed SAR interferograms (NERC grant NE/N011791/1)

Date:

CI_Date:

Date Type:

creation

date:

2019-06-28

Identifier:

RS_Identifier:

code:

http://data.bgs.ac.uk/id/dataHolding/13607483

Abstract:

Processed SAR interferograms for the Wells, Nevada earthquake. Grant abstract: How do earthquakes happen? Understanding the nature of earthquakes is a key fundamental question in Geociences that holds many implications for society. Earthquakes are typically associated with a sudden release of energy that has slowly accumulated over hundreds to thousands of years, being strongly controlled by friction in faults buried several kilometers beneath our feet under quite extreme conditions. For example, the amount of heat produced in just a few seconds is such that it can dramatically change the nature of the fault zone near the sliding surface. Moreover, there is abundant evidence of substantial frictional weakening of faults (i.e., fault strength weakens with increasing slip or slip rate) during earthquakes. However, there are still many open questions related to earthquake source processes: How similar are earthquakes in different temperature-pressure conditions? What is the earthquake's energy budget, which controls the intensity of ground motions? What are the physical mechanisms responsible for fault weakening? Recent progress in seismological imaging methods, theoretical fracture mechanics and rupture dynamics simulations can help solve these questions. Huge volumes of freely available seismic and geodetic data from around the world now allow the routine calculation of earthquake models where earthquakes are typically described as single space-time points. Time is now ripe for systematically building robust, more detailed seismic models bearing information on earthquake's physics by using recently developed sophisticated modelling tools along with high-quality images of the 3-D Earth's interior structure enabled by high performance computing facilities. Moreover, it is now possible to model ruptures theoretically in detail using both analytical fracture mechanics calculations and numerical rupture dynamics simulations, and, for example, estimate the fault temperature during the rupture process, which is the most direct way to quantify friction. However, systematic quantitative links between these calculations and seismological observations are still lacking. This project addresses these issues through a coordinated effort involving seismology and rock mechanics aiming at estimating fault temperature rise during earthquakes from new macroscopic seismic source models. We will use advanced seismic source imaging methods to build a new set of robust kinematic, static and dynamic earthquake source parameters for a large selected set of global earthquakes (e.g., average fault length, width, rupture speed and time history, stress drop, radiated and fracture energy). These solutions will then be used as input parameters to estimate fault temperature using analytical and numerical rupture dynamics calculations. This will lead to an improved understanding of how local fault processes occurring at scales from few microns to tens of centimetres translate into macroscopic seismological properties, how energy is partitioned during earthquakes and which are the mechanisms responsible for fault weakening. Ultimately this project will shed new light on many basic questions in earthquake science such as the similarity of earthquakes in different P-T conditions and the potential geological record left by ruptures (e.g., melt). More broadly, this project will benefit hazard models and any studies relying on accurate earthquake source parameters such as studies in seismic tomography, active tectonics and microseismicity (e.g., associated with hydraulic fracturing).

Point of Contact:

Responsible Party:

Individual Name:

Ana Ferreira

Organisation Name:

University College London

Position Name:

Department of Earth Sciences

Contact Info:

CI_Contact:

Address:

Delivery Point:

Kathleen Lonsdale

city:

London

Postal Code:

WC1E 6BT

e-mail:

not available

role:

pointOfContact

Responsible Party:

Individual Name:

Ana Ferreira

Organisation Name:

University College London

Position Name:

Department of Earth Sciences

Contact Info:

CI_Contact:

Address:

Delivery Point:

Kathleen Lonsdale

city:

London

Postal Code:

WC1E 6BT

e-mail:

not available

role:

principalInvestigator

Resource Maintenance:

MD_MaintenanceInformation:

maint. / update frequency:

notApplicable

Graphic overview:

Browse Graphic:

File Name:

https://resources.bgs.ac.uk/images/geonetworkThumbs/8e044486-0e0f-1786-e054-002128a47908.png

Descriptive Keywords:

Keywords:

keyword:

Geology

keyword:

http://www.eionet.europa.eu/gemet/concept?cp=13&langcode=en&ns=5

Thesaurus Name:

Citation:

Title:

GEMET - INSPIRE themes, version 1.0

Date:

CI_Date:

date:

2008-06-01

Date Type:

publication

Keywords:

keyword:

Satellite imagery

keyword:

NGDC Deposited Data

keyword:

InSAR

Thesaurus Name:

Citation:

Title:

BGS Thesaurus of Geosciences

Date:

CI_Date:

date:

2022

Date Type:

revision

Keywords:

keyword:

NGDC Deposited Data

keyword:

https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html

Type:

dataCentre

Keywords:

keyword:

NERC_DDC

Resource Constraints:

MD_LegalConstraints:

Access Constraints:

otherRestrictions

Other Constraints:

http://inspire.ec.europa.eu/metadata-codelist/LimitationsOnPublicAccess/noLimitations

Other Constraints:

no limitations

Other Constraints:

The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

MD_LegalConstraints:

Use Constraints:

otherRestrictions

Other Constraints:

The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.

Other Constraints:

Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

language:

eng

topicCategory:

geoscientificInformation

Extent:

Geographic Element:

Geographic Bounding Box:

westBoundLongitude:

-120.0000

eastBoundLongitude:

-114.0000

southBoundLatitude:

40.0000

northBoundLatitude:

48.0000

Geographic Description:

Geographic Identifier:

RS_Identifier:

authority:

Citation:

Title:

British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus

Date:

CI_Date:

Date Type:

creation

date:

1979

code:

NEVADA [id=796000]

Temporal Element:

TemporalExtent:

extent:

begin / end:

begin:

2017-04-03

end:

2017-05-30

Distribution

Distribution:

Distribution Format:

Format:

Format Name:

GZ file

Transfer Options:

Digital Transfer Options:

onLine:

CI_OnlineResource:

linkage:

https://www.bgs.ac.uk/services/ngdc/accessions/index.html#item128646

function:

download

Data Quality

Data Quality:

Scope:

DQ_Scope:

level:

dataset

Level Description:

MD_ScopeDescription:

other:

dataset

Report:

Domain Consistency:

Result:

Conformance Result:

specification:

Citation:

Title:

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

Date:

CI_Date:

Date Type:

publication

date:

2011

explanation:

See the referenced specification

pass:

Domain Consistency:

Result:

Conformance Result:

specification:

Citation:

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

Date:

CI_Date:

Date Type:

publication

date:

2010-12-08

explanation:

See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

pass:

Lineage:

LI_Lineage:

statement:

Radar satellite images of the ASAR (Advanced Synthetic Aperture Radar) sensor of the ENVISAT satellite are used to measure the near source ground displacements. The ascending image pair (track 220, with the acquisition on 2007-11-14 and 2008-04-02) and descending image pair (track 399, acquisition on 2007-08-13 and 2008-04-13) are processed with the software package ISCE (InSAR Scientific Computing Environment, Agram et al., 2013) and downsampled using the quadtree algorithm.

Metadata

File Identifier:

8e044486-0e0f-1786-e054-002128a47908

language:

eng

Resource type:

dataset

Metadata Contact:

Responsible Party:

Organisation Name:

British Geological Survey

Contact Info:

CI_Contact:

phone:

CI_Telephone:

voice:

+44 115 936 3100

Address:

Delivery Point:

Environmental Science Centre,Keyworth

city:

NOTTINGHAM

administrative Area:

NOTTINGHAMSHIRE

Postal Code:

NG12 5GG

country:

United Kingdom

e-mail:

enquiries@bgs.ac.uk

role:

pointOfContact

Date Stamp:

2024-04-24

Metadata Standard Name:

http://vocab.nerc.ac.uk/collection/M25/current/GEMINI/

Metadata Standard Name:

UK GEMINI

Metadata Standard Version:

2.3

Dataset URI:

http://data.bgs.ac.uk/id/dataHolding/13607483