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Detection of long period seismic events by using a portable gravity meter, gPhone

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Title
Detection of long period seismic events by using a portable gravity meter, gPhone
Other Titles
이동식 중력계(gPhone)를 활용한 장주기 지진 이벤트 관측
Authors
Lee, Won Sang
Yoo, Hyun Jae
Yun, Sukyoung
Park, Yongcheol
Lee, Choon-Ki
Shin, Dong-Hoon
Eom, Jooyoung
Seo, Ki-Weon
Subject
Engineering
Keywords
Double frequency microseisms; Teleseismic earthquake; gPhone
Issue Date
2015
Citation
Lee, Won Sang, et al. 2015. "Detection of long period seismic events by using a portable gravity meter, gPhone". Journal of the Korean Geophysical Society, 18(1): 31-34.
Abstract
A gravity meter has been used for exploring subsurface mineral resources and monitoring long-period events such as Earth tides. Recently, researchers found several other intriguing features that we could even detect large teleseismic earthquakes and monitor seismic ambient noise using gravimeters. The zero-length spring suspension technology gives the gPhone (Micro-g LaCoste) excellent low frequency sensitivity, which may have implications for investigating much longer-period natural events (e.g., Earth’s hum, tsunami waves, etc.). In this study, we present preliminary results through temporary operation of the gPhone at Geumsan in South Korea for 9 months (Nov. 2008-Jul. 2009). The gPhone successfully recorded large teleseismic events and showed a clear seasonal variation of the Double frequency microseisms during its operation period.
URI
http://repository.kopri.re.kr/handle/201206/6575
DOI
http://dx.doi.org/10.7582/GGE.2015.18.1.031
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