Analyzing groundwater level anomalies in a fault zone in Korea caused by local and offshore earthquakes

Sul Min Yun, Se Yeong Hamm, Jae Yeol Cheong, Chung Mo Lee, Woo Seok Seo, Nam Chil Woo

Research output: Contribution to journalArticle

Abstract

This study analyzed groundwater level changes in a monitoring well located in Korea’s Yangsan fault zone, induced by local (Gyeongju and Pohang) earthquakes in Korea and offshore earthquakes around the world. Among offshore earthquakes, the MW 7.3 Honshu earthquake changed raw groundwater level of a maximum of 10.3 cm. The groundwater level data were analyzed by using the Hilbert-Huang transform (HHT), modified moving average (MMA), and simple subtraction (SS) methods. In the first stage, earthquake-induced groundwater level changes were identified using the MMA and SS methods because the SS and MMA methods may excellently be used for identifying earthquake-induced groundwater level anomalies as a convenient way to identify abnormal fluctuations. Then, the HHT technique was applied to the 2016–2017 groundwater level data for comparison with the MMA and SS methods. The HHT method has been proven to be the most accurate method for detecting the effects of earthquakes on groundwater levels. The differences of water levels analyzed by the HHT method and the other two methods resulted in between 0.4 and 1.9 cm, showing closer levels between the HHT and SS methods.

LanguageEnglish
Pages137-148
Number of pages12
JournalGeosciences Journal
Volume23
Issue number1
DOIs
Publication statusPublished - 2019 Feb 1

Fingerprint

fault zone
anomaly
earthquake
groundwater
transform
method
water level
well
monitoring

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Cite this

Yun, Sul Min ; Hamm, Se Yeong ; Cheong, Jae Yeol ; Lee, Chung Mo ; Seo, Woo Seok ; Woo, Nam Chil. / Analyzing groundwater level anomalies in a fault zone in Korea caused by local and offshore earthquakes. In: Geosciences Journal. 2019 ; Vol. 23, No. 1. pp. 137-148.
@article{b57615c70b6841f0a10f9f1a7883cddf,
title = "Analyzing groundwater level anomalies in a fault zone in Korea caused by local and offshore earthquakes",
abstract = "This study analyzed groundwater level changes in a monitoring well located in Korea’s Yangsan fault zone, induced by local (Gyeongju and Pohang) earthquakes in Korea and offshore earthquakes around the world. Among offshore earthquakes, the MW 7.3 Honshu earthquake changed raw groundwater level of a maximum of 10.3 cm. The groundwater level data were analyzed by using the Hilbert-Huang transform (HHT), modified moving average (MMA), and simple subtraction (SS) methods. In the first stage, earthquake-induced groundwater level changes were identified using the MMA and SS methods because the SS and MMA methods may excellently be used for identifying earthquake-induced groundwater level anomalies as a convenient way to identify abnormal fluctuations. Then, the HHT technique was applied to the 2016–2017 groundwater level data for comparison with the MMA and SS methods. The HHT method has been proven to be the most accurate method for detecting the effects of earthquakes on groundwater levels. The differences of water levels analyzed by the HHT method and the other two methods resulted in between 0.4 and 1.9 cm, showing closer levels between the HHT and SS methods.",
author = "Yun, {Sul Min} and Hamm, {Se Yeong} and Cheong, {Jae Yeol} and Lee, {Chung Mo} and Seo, {Woo Seok} and Woo, {Nam Chil}",
year = "2019",
month = "2",
day = "1",
doi = "10.1007/s12303-018-0062-8",
language = "English",
volume = "23",
pages = "137--148",
journal = "Geosciences Journal",
issn = "1226-4806",
publisher = "Korean Association of Geoscience Societies",
number = "1",

}

Analyzing groundwater level anomalies in a fault zone in Korea caused by local and offshore earthquakes. / Yun, Sul Min; Hamm, Se Yeong; Cheong, Jae Yeol; Lee, Chung Mo; Seo, Woo Seok; Woo, Nam Chil.

In: Geosciences Journal, Vol. 23, No. 1, 01.02.2019, p. 137-148.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Analyzing groundwater level anomalies in a fault zone in Korea caused by local and offshore earthquakes

AU - Yun, Sul Min

AU - Hamm, Se Yeong

AU - Cheong, Jae Yeol

AU - Lee, Chung Mo

AU - Seo, Woo Seok

AU - Woo, Nam Chil

PY - 2019/2/1

Y1 - 2019/2/1

N2 - This study analyzed groundwater level changes in a monitoring well located in Korea’s Yangsan fault zone, induced by local (Gyeongju and Pohang) earthquakes in Korea and offshore earthquakes around the world. Among offshore earthquakes, the MW 7.3 Honshu earthquake changed raw groundwater level of a maximum of 10.3 cm. The groundwater level data were analyzed by using the Hilbert-Huang transform (HHT), modified moving average (MMA), and simple subtraction (SS) methods. In the first stage, earthquake-induced groundwater level changes were identified using the MMA and SS methods because the SS and MMA methods may excellently be used for identifying earthquake-induced groundwater level anomalies as a convenient way to identify abnormal fluctuations. Then, the HHT technique was applied to the 2016–2017 groundwater level data for comparison with the MMA and SS methods. The HHT method has been proven to be the most accurate method for detecting the effects of earthquakes on groundwater levels. The differences of water levels analyzed by the HHT method and the other two methods resulted in between 0.4 and 1.9 cm, showing closer levels between the HHT and SS methods.

AB - This study analyzed groundwater level changes in a monitoring well located in Korea’s Yangsan fault zone, induced by local (Gyeongju and Pohang) earthquakes in Korea and offshore earthquakes around the world. Among offshore earthquakes, the MW 7.3 Honshu earthquake changed raw groundwater level of a maximum of 10.3 cm. The groundwater level data were analyzed by using the Hilbert-Huang transform (HHT), modified moving average (MMA), and simple subtraction (SS) methods. In the first stage, earthquake-induced groundwater level changes were identified using the MMA and SS methods because the SS and MMA methods may excellently be used for identifying earthquake-induced groundwater level anomalies as a convenient way to identify abnormal fluctuations. Then, the HHT technique was applied to the 2016–2017 groundwater level data for comparison with the MMA and SS methods. The HHT method has been proven to be the most accurate method for detecting the effects of earthquakes on groundwater levels. The differences of water levels analyzed by the HHT method and the other two methods resulted in between 0.4 and 1.9 cm, showing closer levels between the HHT and SS methods.

UR - http://www.scopus.com/inward/record.url?scp=85058395554&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85058395554&partnerID=8YFLogxK

U2 - 10.1007/s12303-018-0062-8

DO - 10.1007/s12303-018-0062-8

M3 - Article

VL - 23

SP - 137

EP - 148

JO - Geosciences Journal

T2 - Geosciences Journal

JF - Geosciences Journal

SN - 1226-4806

IS - 1

ER -