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Gravity Changes and Internal Processes: Some Results Obtained from Observations at Three Volcanoes

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Geodetic and Geophysical Effects Associated with Seismic and Volcanic Hazards

Part of the book series: Pageoph Topical Volumes ((PTV))

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Abstract

Temporal gravity changes provide information about mass and/or density variations within and below the volcano edifice. Three active volcanoes have been under investigation; each of them related to a plate boundary: Mayon/Luzon/Philippines, Merapi/Java/Indonesia, and Galeras/Colombia. The observed gravity changes are smaller than previously expected but significant. For the three volcanoes under investigation, and within the observation period, mainly the increase of gravity is observed, ranging from 1,000 nm−2to 1,600 nms−2. Unexpectedly, the gravity increase is confined to a rather small area with radii of 5 to 8 km around the summit.

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Author information

Authors and Affiliations

  1. Institut für Geowissenschaften, Friedrich-Schiller Universität, Burgweg 11, D-07749, Jena, Germany

    Gerhard Jentzsch & Adelheid Weise

  2. Ingeominas (Instituto de Investigationes en Geosciencias, Mineria y Quimica), Diagonal 53 No. 34-53, Santafe de Bogota, Colombia

    Carlos Rey

  3. Institut für Physikalische Geodäsie, Technische Universität Darmstadt, Petersenstr. 13, D-64287, Darmstadt, Germany

    Carl Gerstenecker

Authors
  1. Gerhard Jentzsch
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  2. Adelheid Weise
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  3. Carlos Rey
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  4. Carl Gerstenecker
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Editor information

Editors and Affiliations

  1. Instituto de Astronomía y Geodesia Facultad de Ciencias Matemáticas, Ciudad Universitaria, Pza. de Ciencias, 3, 28040, Madrid, Spain

    José Fernández

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Jentzsch, G., Weise, A., Rey, C., Gerstenecker, C. (2004). Gravity Changes and Internal Processes: Some Results Obtained from Observations at Three Volcanoes. In: Fernández, J. (eds) Geodetic and Geophysical Effects Associated with Seismic and Volcanic Hazards. Pageoph Topical Volumes. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-7897-5_8

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  • DOI: https://doi.org/10.1007/978-3-0348-7897-5_8

  • Publisher Name: Birkhäuser, Basel

  • Print ISBN: 978-3-7643-7044-2

  • Online ISBN: 978-3-0348-7897-5

  • eBook Packages: Springer Book Archive

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