HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Peer-reviewed Journal Articles, etc >

Observation of Earth's free oscillation by dense GPS array: After the 2011 Tohoku megathrust earthquake

This item is licensed under:Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported

Files in This Item:
MitsuiHeki_SciRep2012.pdf513.29 kBPDFView/Open
Please use this identifier to cite or link to this item:

Title: Observation of Earth's free oscillation by dense GPS array: After the 2011 Tohoku megathrust earthquake
Authors: Mitsui, Yuta Browse this author →KAKEN DB
Heki, Kosuke Browse this author →KAKEN DB
Issue Date: 5-Dec-2012
Publisher: Nature Publishing Group
Journal Title: Scientific Reports
Volume: 2
Issue: 931
Start Page: 1
End Page: 4
Publisher DOI: 10.1038/srep00931
Abstract: Day-scale Earth’s free oscillation after large earthquakes has been detected by underground instruments such as strainmeters, gravimeters and seismometers, to investigate Earth’s internal structure, geodynamics, and source properties of earthquakes. Here we show that Global Positioning System (GPS) can also detect the signals of the Earth’s free oscillation. A dense GPS array in Japan (GEONET) recorded the surface deformation following the 2011 Tohoku megathrust earthquake. A simple array analysis over 300 stations reduces local noise in GPS time series. We find that the dense GPS array truly detected both spheroidal and toroidal fundamental modes in three-direction displacement. This new tool has a strong potential to investigate the free oscillations particularly in low-frequency bands.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 日置 幸介

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University