7 November 2012 Earthquake monitoring using fiber laser borehole seismometer
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Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 8421B5 (2012) https://doi.org/10.1117/12.974789
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China
Abstract
In this paper we report the earthquake monitoring using a fiber laser borehole seismometer. A fiber laser based accelerometer is used in the seismometer to detect the earthquake induced acceleration. Due to the ultra-narrow line width of the fiber laser (up to several kHz), an equivalent noise level of 50 ng can be achieved when using a fiber optic interferometric method. The fiber laser borehole seismometer is installed in a 400 m depth hole in Yunnan Province. A micro-earthquake (M=1.2) in Puer area is detected.
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Wentao Zhang, Wentao Zhang, Wenzhu Huang, Wenzhu Huang, Fang Li, Fang Li, } "Earthquake monitoring using fiber laser borehole seismometer", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 8421B5 (7 November 2012); doi: 10.1117/12.974789; https://doi.org/10.1117/12.974789
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