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Imaging the Hydrothermal System of Kirishima Volcanic Complex, Japan with L-band InSAR Time Series

Yunjun, Zhang and Amelung, Falk and Aoki, Yosuke (2021) Imaging the Hydrothermal System of Kirishima Volcanic Complex, Japan with L-band InSAR Time Series. . (Unpublished) https://resolver.caltech.edu/CaltechAUTHORS:20210216-140504468

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Abstract

We present deformation measurements of the Kirishima volcanic complex from ALOS-1/2 Interferometric Synthetic Aperture Radar (InSAR) time-series during 2006-2019. Shinmoe-dake deflated ~6 cm during the 2008-2010 phreatic eruptions and inflated ~5 cm prior to the 2017 magmatic eruption. Iwo-yama inflated ~19 cm within the crater since January 2015 and ~7 cm around the southern and western vent since four months before the 2018 eruption. These deformations can be modeled as an ellipsoid at ~700 m depth beneath Shinmoe-dake and as a sphere on top of an ellipsoid at ~130 and ~340 m depths beneath Iwo-yama. Combining geodetic, geoelectric, geochemical and petrological analysis, we interpret the hydrothermal origin of the deflation at Shinmoe-dake and inflation at Iwo-yama; the hydrothermal-magmatic transition during the 2011 Shinmoe-dake eruption; water-boiling and bottom-up pressurization as driving mechanisms of the inflation at Iwo-yama. The study highlights the imaging potential of InSAR time-series on complex hydrothermal systems.


Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription
https://doi.org/10.1002/essoar.10506213.2DOIDiscussion Paper - version 2
https://doi.org/10.1002/essoar.10506213.1DOIDiscussion Paper - version 1
https://doi.org/10.5281/zenodo.4661725DOIInSAR displacement products and geodetic modeling
https://doi.org/10.5281/zenodo.4499238DOIInSAR displacement products and geodetic modeling
https://doi.org/10.5281/zenodo.4499208DOIInSAR displacement products and geodetic modeling
https://doi.org/10.5281/zenodo.4661735DOICode
ORCID:
AuthorORCID
Yunjun, Zhang0000-0001-9441-7082
Amelung, Falk0000-0003-1762-8665
Aoki, Yosuke0000-0002-2539-4144
Alternate Title:Imaging the Hydrothermal System of Kirishima Volcanic Complex, Japan with ALOS-1/2 InSAR Time Series
Additional Information:License: Attribution 4.0 International. The ALOS and ALOS-2 data are shared among the PALSAR Interferometry Consortium to Study our Evolving Land surface (PIXEL) and provided by JAXA under contract with the University of Tokyo. The ownership of SAR data belongs to JAXA and the Ministry of Economy Trade and Industry. We thank GSI for the DEM and GPS data, JMA for the earthquake data. We thank Jamie Farquharson, Heresh Fattahi, Mehdi Nikkhoo, Piyush Agram and Bhuvan Varugu for discussions. This work was supported by NASA Headquarters under the Earth and Space Science Fellowship program (Grant No. NNX15AN13H) and National Science Foundation’s Geophysics program (Grant No. EAR1345129). Data and Code Availability:The InSAR displacement products and geodetic modeling results are available on Zenodo(https://doi.org/10.5281/zenodo.4661725, https://doi.org/10.5281/zenodo.4499238 andhttps://doi.org/10.5281/zenodo.4499208). Figures are prepared using GMT (Wessel et al., 2013)and Matplotlib (Hunter, 2007) in Jupyter Notebook available on Zenodo(https://doi.org/10.5281/zenodo.4661735).
Group:Seismological Laboratory
Funders:
Funding AgencyGrant Number
NASANNX15AN13H
NSFEAR-1345129
Record Number:CaltechAUTHORS:20210216-140504468
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210216-140504468
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108072
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:18 Feb 2021 18:32
Last Modified:21 Apr 2021 17:49

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