Pure and Applied Geophysics

, Volume 164, Issue 4, pp 837–850 | Cite as

A Hybrid Model for the Summit Region of Merapi Volcano, Java, Indonesia, Derived from Gravity Changes and Deformation Measured between 2000 and 2002

  • C. Tiede
  • J. Fernández
  • C. Gerstenecker
  • K. F. Tiampo
Article

Abstract

Three-dimensional displacements and gravity changes were measured at 20 points between 2000 and 2002 at Merapi volcano, Java, Indonesia. Former models focused on the modeling of a single magmatic source located in the summit region of the volcano. Such models do not fit to our measurements between 2000 and 2002. A new hybrid model approach is developed consisting of an elastic-gravitational source described by a mass and energy term as well as a combined dip-slip/strike-slip fault zone in the summit region. Both nonlinear optimization problems, given by the common inversion of three-dimensional displacements and gravity changes, are solved by applying a genetic algorithm. The hybrid model fits the measurements accurately, tested by Fisher test statistics. Furthermore, our model for Merapi volcano confirms previous structural models for this region so that the new model is statistically proven as well as physically reliable.

Keywords

Hybrid model Merapi volcano fault model elastic-gravitational model genetic algorithm 

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Copyright information

© Birkhäuser Verlag, Basel, 2007

Authors and Affiliations

  • C. Tiede
    • 1
  • J. Fernández
    • 2
  • C. Gerstenecker
    • 3
  • K. F. Tiampo
    • 4
  1. 1.Max-Planck Institute for AstronomyHeidelbergGermany
  2. 2.Instituto de Astronomia y Geodesia (CSIC-UCM), Facultad de Ciencias MatemáticasCiudad UniversitariaMadridSpain
  3. 3.Institute of Physical GeodesyDarmstadt University of TechnologyDarmstadtGermany
  4. 4.Department of Earth Sciences, Biological and Geological SciencesUniversity of Western OntarioLondonCanada

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