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JDR Vol.10 No.1 pp. 106-112
(2015)
doi: 10.20965/jdr.2015.p0106

Paper:

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Ground Deformation of Mayon Volcano Revealed by GPS Campaign Survey

Akimichi Takagi*1, Kenji Fujiwara*2, Takahiro Ohkura*3,
Artemio C. Luis, Jr.*4, Alejo V. Baloloy*5, Shinobu Ando*1,
Eduardo Laguerta*5, and Ma. Antonia V. Bornas*4

*1Meteorological Research Institute, Japan Meteorological Agency (JMA), 1-1 Nagamine, Tsukuba, Ibaraki 305-0052, Japan

*2Seismology and Volcanology Department, Japan Meteorological Agency (JMA), Tokyo, Japan

*3Aso Volcanological Laboratory, Kyoto University, Kumamoto, Japan

*4Volcano Monitoring and Eruption Prediction Division, Philippine Institute of Volcanology and Seismology (PHIVOLCS), Philippines

*5Mayon Volcano Observatory, Philippine Institute of Volcanology and Seismology (PHIVOLCS), Philippines

Received:
August 3, 2014
Accepted:
December 3, 2014
Published:
February 1, 2015
Creative Commons License
Keywords:
Mayon volcano, GPS, ground deformation, pressure source, eruption
Abstract
Determining the location and the amount of volume change of the pressure source beneath a volcano during the eruption preparation stage is an important issue in monitoring the magma accumulation. To do so, we have implemented a GPS campaign survey network around the Mayon volcano and monitored ground deformation since 2005. Rapid grounddeflating deformation was detected accompanied by the 2009 eruption. The Mogi model pressure source was estimated to be 8.5 km deep beneath the summit and the amount of volume change –13 × 106 m3. In magma accumulation preceding the 2009 eruption, ground deformation showed a weak inflationary trend, but it was difficult to evaluate the source parameters definitively. After the 2009 eruption, no deformation has been detected by the Continuous GPS observation network since 2012. Trend of many baselines of continuous and campaign network turned to extension since 2014. Magma may have started accumulating beneath the Mayon volcano.
Cite this article as:
A. Takagi, K. Fujiwara, T. Ohkura, A. Luis, Jr., A. Baloloy, S. Ando, E. Laguerta, and M. Bornas, “Ground Deformation of Mayon Volcano Revealed by GPS Campaign Survey,” J. Disaster Res., Vol.10 No.1, pp. 106-112, 2015.
Data files:
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