Groundwater helium anomaly reflects strain change during the 2016 Kumamoto earthquake in Southwest Japan

Yuji Sano, Naoto Takahata, Takanori Kagoshima, Tomo Shibata, Tetsuji Onoue, Dapeng Zhao

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Geochemical monitoring of groundwater and soil gas emission pointed out precursor and/or coseismic anomalies of noble gases associated with earthquakes, but there was lack of plausible physico-chemical basis. A laboratory experiment of rock fracturing and noble gas emission was conducted, but there is no quantitative connection between the laboratory results and observation in field. We report here deep groundwater helium anomalies related to the 2016 Kumamoto earthquake, which is an inland crustal earthquake with a strike-slip fault and a shallow hypocenter (10 km depth) close to highly populated areas in Southwest Japan. The observed helium isotope changes, soon after the earthquake, are quantitatively coupled with volumetric strain changes estimated from a fault model, which can be explained by experimental studies of helium degassing during compressional loading of rock samples. Groundwater helium is considered as an effective strain gauge. This suggests the first quantitative linkage between geochemical and seismological observations and may open the possibility to develop a new monitoring system to detect a possible strain change prior to a hazardous earthquake in regions where conventional borehole strain meter is not available.

Original languageEnglish
Article number37939
JournalScientific reports
Volume6
DOIs
Publication statusPublished - Nov 29 2016

Fingerprint

helium
anomaly
earthquake
groundwater
noble gas
helium isotope
soil gas
degassing
strike-slip fault
monitoring system
rock
gauge
experimental study
borehole
monitoring

All Science Journal Classification (ASJC) codes

  • General

Cite this

Groundwater helium anomaly reflects strain change during the 2016 Kumamoto earthquake in Southwest Japan. / Sano, Yuji; Takahata, Naoto; Kagoshima, Takanori; Shibata, Tomo; Onoue, Tetsuji; Zhao, Dapeng.

In: Scientific reports, Vol. 6, 37939, 29.11.2016.

Research output: Contribution to journalArticle

Sano, Yuji ; Takahata, Naoto ; Kagoshima, Takanori ; Shibata, Tomo ; Onoue, Tetsuji ; Zhao, Dapeng. / Groundwater helium anomaly reflects strain change during the 2016 Kumamoto earthquake in Southwest Japan. In: Scientific reports. 2016 ; Vol. 6.
@article{985aa3282a144c73a83a5dc52692c6e5,
title = "Groundwater helium anomaly reflects strain change during the 2016 Kumamoto earthquake in Southwest Japan",
abstract = "Geochemical monitoring of groundwater and soil gas emission pointed out precursor and/or coseismic anomalies of noble gases associated with earthquakes, but there was lack of plausible physico-chemical basis. A laboratory experiment of rock fracturing and noble gas emission was conducted, but there is no quantitative connection between the laboratory results and observation in field. We report here deep groundwater helium anomalies related to the 2016 Kumamoto earthquake, which is an inland crustal earthquake with a strike-slip fault and a shallow hypocenter (10 km depth) close to highly populated areas in Southwest Japan. The observed helium isotope changes, soon after the earthquake, are quantitatively coupled with volumetric strain changes estimated from a fault model, which can be explained by experimental studies of helium degassing during compressional loading of rock samples. Groundwater helium is considered as an effective strain gauge. This suggests the first quantitative linkage between geochemical and seismological observations and may open the possibility to develop a new monitoring system to detect a possible strain change prior to a hazardous earthquake in regions where conventional borehole strain meter is not available.",
author = "Yuji Sano and Naoto Takahata and Takanori Kagoshima and Tomo Shibata and Tetsuji Onoue and Dapeng Zhao",
year = "2016",
month = "11",
day = "29",
doi = "10.1038/srep37939",
language = "English",
volume = "6",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",

}

TY - JOUR

T1 - Groundwater helium anomaly reflects strain change during the 2016 Kumamoto earthquake in Southwest Japan

AU - Sano, Yuji

AU - Takahata, Naoto

AU - Kagoshima, Takanori

AU - Shibata, Tomo

AU - Onoue, Tetsuji

AU - Zhao, Dapeng

PY - 2016/11/29

Y1 - 2016/11/29

N2 - Geochemical monitoring of groundwater and soil gas emission pointed out precursor and/or coseismic anomalies of noble gases associated with earthquakes, but there was lack of plausible physico-chemical basis. A laboratory experiment of rock fracturing and noble gas emission was conducted, but there is no quantitative connection between the laboratory results and observation in field. We report here deep groundwater helium anomalies related to the 2016 Kumamoto earthquake, which is an inland crustal earthquake with a strike-slip fault and a shallow hypocenter (10 km depth) close to highly populated areas in Southwest Japan. The observed helium isotope changes, soon after the earthquake, are quantitatively coupled with volumetric strain changes estimated from a fault model, which can be explained by experimental studies of helium degassing during compressional loading of rock samples. Groundwater helium is considered as an effective strain gauge. This suggests the first quantitative linkage between geochemical and seismological observations and may open the possibility to develop a new monitoring system to detect a possible strain change prior to a hazardous earthquake in regions where conventional borehole strain meter is not available.

AB - Geochemical monitoring of groundwater and soil gas emission pointed out precursor and/or coseismic anomalies of noble gases associated with earthquakes, but there was lack of plausible physico-chemical basis. A laboratory experiment of rock fracturing and noble gas emission was conducted, but there is no quantitative connection between the laboratory results and observation in field. We report here deep groundwater helium anomalies related to the 2016 Kumamoto earthquake, which is an inland crustal earthquake with a strike-slip fault and a shallow hypocenter (10 km depth) close to highly populated areas in Southwest Japan. The observed helium isotope changes, soon after the earthquake, are quantitatively coupled with volumetric strain changes estimated from a fault model, which can be explained by experimental studies of helium degassing during compressional loading of rock samples. Groundwater helium is considered as an effective strain gauge. This suggests the first quantitative linkage between geochemical and seismological observations and may open the possibility to develop a new monitoring system to detect a possible strain change prior to a hazardous earthquake in regions where conventional borehole strain meter is not available.

UR - http://www.scopus.com/inward/record.url?scp=84999851907&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84999851907&partnerID=8YFLogxK

U2 - 10.1038/srep37939

DO - 10.1038/srep37939

M3 - Article

VL - 6

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

M1 - 37939

ER -