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Modelling Gravity changes and crustal deformation in active volcanic areas

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dc.creator Charco, María
dc.creator Tiampo, Kristy F.
dc.creator Luzón, Francisco
dc.creator Fernández Torres, José
dc.date 2008-05-23T09:26:13Z
dc.date 2008-05-23T09:26:13Z
dc.date 2005
dc.date.accessioned 2017-01-31T01:26:47Z
dc.date.available 2017-01-31T01:26:47Z
dc.identifier Física de la Tierra 2005, 17, 129-146
dc.identifier 0214-4557 (Print)
dc.identifier 1988-2440 (Online)
dc.identifier http://hdl.handle.net/10261/4480
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/4480
dc.description Elastic half-space models are widely used to interpret displacements and gravity changes in active volcanic areas. Those models usually compute the displacement response to dilatational sources that simulate a change in pressure of the magma chamber. However, elastic-gravitational model allows one to compute gravity, deformation and potential changes due to pressurized cavities and intruded masses together. First, we interpret deformation and gravity change data in Long Valley caldera, California, by using both a classical elastic and an elastic-gravitational model. Our results show that intruded mass can not be neglected for interpretation of gravity changes while displacements are mainly caused by pressurization. Therefore, the intrusion mass together with the associated pressurization produces distinctive changes in gravity that could be used to interpret gravity changes without ground deformation or viceversa depending on what is the source playing the main role in modelling. Second, we model the source of inflation at Long Valley caldera using a Genetic Algorithm inversion technique and microgravity data (1982-1998). The results of the performed inversions fit gravity anomaly centered under the resurgent dome. The two source inversion suggest that the gravity change could be caused by a more spatially distributed source under the resurgent dome.
dc.description The research by MC and JF has been funded uder MCyT projecte REN2002-03450. The work of KFT was performed under NASA grant NAG5-3054 and an NSERC Discovery Grant. The research of FL was supported under MCyT project REN2002-04198-C02-02/RIES and by the European community with FEDER the research team RNM-194 of Junta de Andalucía, Spain.
dc.description Peer reviewed
dc.format 960427 bytes
dc.format application/pdf
dc.language eng
dc.publisher Universidad Complutense de Madrid
dc.rights openAccess
dc.subject Elastic-gravitational model
dc.subject Volcanic source
dc.subject Gravity
dc.subject Displacement
dc.subject Genetic Algorithm
dc.title Modelling Gravity changes and crustal deformation in active volcanic areas
dc.type Artículo

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