Recent volcanic activity at the Asama volcano and long-period seismic signals

Modern observation systems composed of seismic, geodetic, other geophysical, and geochemical networks developed in and around volcanic areas provide a mass of knowledge about volcanic activities. This paper summarizes the magma pathway and recent volcanic activity of the Asama volcano. The seismic v...

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Bibliographic Details
Published in:Proceedings of the Japan Academy Series B, 2022/10/11, Vol.98(8), pp.416-438
Main Authors: TAKEO, Minoru, AOKI, Yosuke, KOYAMA, Takao
Format: Article
Language:English
Subjects:
Asama volcano
Earthquakes
Eruptions
Japan
Lava
long-period seismic signal
Magma
magma pathway
Observatories
Review
Sea level
Seismic tomography
Seismic waves
Seismology
Sensors
temporal evolution of volcanic activity
Tomography
United Kingdom
Velocity
Volcanic activity
Volcanoes
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Summary:Modern observation systems composed of seismic, geodetic, other geophysical, and geochemical networks developed in and around volcanic areas provide a mass of knowledge about volcanic activities. This paper summarizes the magma pathway and recent volcanic activity of the Asama volcano. The seismic velocity structure beneath the Asama volcano was investigated via seismic ambient noise tomography and active source seismic tomography. The magma pathway in the upper crust beneath the Asama volcano was synthesized by combining the velocity structure with a hypocenter distribution of volcanic earthquakes and ground deformations before and after eruptions. Temporal evolutions of multidiscipline data regarding the volcanic activity from October 2003 to January 2018 revealed that the supplied amount of magma from the magma chamber and the internal condition in the shallow regions of the conduit controlled the recent eruptions.
ISSN:0386-2208
0021-4280
1349-2896
DOI:10.2183/pjab.98.022