Earthquake monitoring using fiber laser borehole seismometer

Wentao Zhang; Wenzhu Huang; Fang Li

doi:10.1117/12.974789

7 November 2012 Earthquake monitoring using fiber laser borehole seismometer

Wentao Zhang, Wenzhu Huang, Fang Li

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.

Citation Download Citation

Wentao Zhang, Wenzhu Huang, and Fang Li "Earthquake monitoring using fiber laser borehole seismometer", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 8421B5 (7 November 2012); https://doi.org/10.1117/12.974789

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