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Earth, Planets and Space
Fig. 10 | Earth, Planets and Space

Fig. 10

From: Groundwater pressure changes and crustal deformation before and after the 2007 and 2014 eruptions of Mt. Ontake

Fig. 10

Schematic diagrams Mt. Ontake, the GOT well, and the a 2007 and b 2014 eruption mechanisms. a-1 Mt. Ontake and GOT well before the 2007 eruption. a-2 Model of the 2007 eruption. An isotropic large magmatic source in the deep place causes large crustal deformation over a wide area around Mt. Ontake and groundwater pressure changes at GOT. b-1 Model 1 of the 2014 eruption. The existing magma is supplying heat to the summit of Mt. Ontake. The supplied heat eventually causes a phreatic eruption, but the eruption is not accompanied by any large crustal deformation or groundwater pressure changes at GOT. b-2 Model 2 of the 2014 eruption. A small isotropic magmatic source in the shallow place did not cause large crustal deformation nor groundwater pressure changes at GOT

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