Detection of Earth's free oscillation excited by the Japan Mw9.0 Earthquake using different tiltmeter and strainmeter
The observatory network of the Crustal Deformation China Seismological Bureau was equipped with vertical pendulum tiltmeter, borehole tiltmeter, tunnel extension meters, multi-component borehole strainmeter, body strainmeter and other tilt and strain observation instruments. All of these instruments...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2018-09-01
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| Series: | Geodesy and Geodynamics |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674984717301945 |
| _version_ | 1818942750659182592 |
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| author | Yan Zhang Fangjie Meng |
| author_facet | Yan Zhang Fangjie Meng |
| author_sort | Yan Zhang |
| collection | DOAJ |
| description | The observatory network of the Crustal Deformation China Seismological Bureau was equipped with vertical pendulum tiltmeter, borehole tiltmeter, tunnel extension meters, multi-component borehole strainmeter, body strainmeter and other tilt and strain observation instruments. All of these instruments have recorded the Earth's free oscillation excited by the Japan Mw9.0 Earthquake. By analyzing those observations, all of the spheroidal oscillation modes (0S3—0S30) and toroidal oscillation modes (0T3—0T20) excited by the Japan Mw9.0 Earthquake were detected in this paper. In addition, comparing the different observation results which obtained by those instruments, we revealed their capacity to observe different kinds of oscillation and different frequency band modes, and analyzed report the reason. We found that the body strainmeter and the vertical pendulum tiltmeter have better observing results for spheroidal oscillation. Because of high noise in low frequency band, the borehole tiltmeter cannot observe the low-order spheroidal oscillation. In terms of observing the toroidal oscillation, the multi-component borehole strainmeter got a best result. The vertical pendulum tiltmeter observes a few toroidal oscillation modes, and the tunnel extension meters can only observe some low-order modes. Keywords: Tiltmeter, Strainmeter, Free oscillation of the Earth, Tohoku earthquake |
| first_indexed | 2024-12-20T07:16:24Z |
| format | Article |
| id | doaj.art-ef4a786f42f144959e1c0d9501aa3bcc |
| institution | Directory Open Access Journal |
| issn | 1674-9847 |
| language | English |
| last_indexed | 2024-12-20T07:16:24Z |
| publishDate | 2018-09-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Geodesy and Geodynamics |
| spelling | doaj.art-ef4a786f42f144959e1c0d9501aa3bcc2022-12-21T19:48:47ZengKeAi Communications Co., Ltd.Geodesy and Geodynamics1674-98472018-09-0195398403Detection of Earth's free oscillation excited by the Japan Mw9.0 Earthquake using different tiltmeter and strainmeterYan Zhang0Fangjie Meng1Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, China; Wuhan Base of Institute of Crustal Dynamics, China Earthquake Administration, Wuhan 430071, China; Corresponding author. Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan, 430071, China.Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, China; Wuhan Base of Institute of Crustal Dynamics, China Earthquake Administration, Wuhan 430071, ChinaThe observatory network of the Crustal Deformation China Seismological Bureau was equipped with vertical pendulum tiltmeter, borehole tiltmeter, tunnel extension meters, multi-component borehole strainmeter, body strainmeter and other tilt and strain observation instruments. All of these instruments have recorded the Earth's free oscillation excited by the Japan Mw9.0 Earthquake. By analyzing those observations, all of the spheroidal oscillation modes (0S3—0S30) and toroidal oscillation modes (0T3—0T20) excited by the Japan Mw9.0 Earthquake were detected in this paper. In addition, comparing the different observation results which obtained by those instruments, we revealed their capacity to observe different kinds of oscillation and different frequency band modes, and analyzed report the reason. We found that the body strainmeter and the vertical pendulum tiltmeter have better observing results for spheroidal oscillation. Because of high noise in low frequency band, the borehole tiltmeter cannot observe the low-order spheroidal oscillation. In terms of observing the toroidal oscillation, the multi-component borehole strainmeter got a best result. The vertical pendulum tiltmeter observes a few toroidal oscillation modes, and the tunnel extension meters can only observe some low-order modes. Keywords: Tiltmeter, Strainmeter, Free oscillation of the Earth, Tohoku earthquakehttp://www.sciencedirect.com/science/article/pii/S1674984717301945 |
| spellingShingle | Yan Zhang Fangjie Meng Detection of Earth's free oscillation excited by the Japan Mw9.0 Earthquake using different tiltmeter and strainmeter Geodesy and Geodynamics |
| title | Detection of Earth's free oscillation excited by the Japan Mw9.0 Earthquake using different tiltmeter and strainmeter |
| title_full | Detection of Earth's free oscillation excited by the Japan Mw9.0 Earthquake using different tiltmeter and strainmeter |
| title_fullStr | Detection of Earth's free oscillation excited by the Japan Mw9.0 Earthquake using different tiltmeter and strainmeter |
| title_full_unstemmed | Detection of Earth's free oscillation excited by the Japan Mw9.0 Earthquake using different tiltmeter and strainmeter |
| title_short | Detection of Earth's free oscillation excited by the Japan Mw9.0 Earthquake using different tiltmeter and strainmeter |
| title_sort | detection of earth s free oscillation excited by the japan mw9 0 earthquake using different tiltmeter and strainmeter |
| url | http://www.sciencedirect.com/science/article/pii/S1674984717301945 |
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