The Fiber-Optic Rotational Seismograph-Laboratory Tests and Field Application.

Leszek R Jaroszewicz,Krzysztof P Teisseyre,Jerzy K Kowalski,Michał Dudek,Zbigniew Krajewski,Anna Kurzych

doi:10.3390/s19122699

Leszek R Jaroszewicz, Krzysztof P Teisseyre + Show 4 more

Open Access

https://doi.org/10.3390/s19122699

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Abstract

The paper presents construction and laboratory tests, as well as the first field application of a new fiber-optic rotational seismograph. The system is based on a fiber-optic gyroscope (FOG), with determined Angle Random Walk of the order of 10−8 rad/Sqrt(s) and a few rad/s maximum detectable amplitude of rotation in the frequency range from direct current (DC) to 328.12 Hz. It has been designed for the rotational seismology area of interest. This work also presents exemplary relevant measurements, which were conducted using a set of two devices installed in the geophysical observatory in Książ, Poland.

Highlights

This paper deals with an innovative sensor suitable for rotational seismology, which falls within rotational ground movements from earthquakes, explosions, and ambient vibrations [1]
Symposium on Sensor Science (I3S2019) in Naples, Italy [15], in which we described the construction and laboratory tests, as well as results of field application of the set of two identical FOSREM® —the innovative Fiber-Optic Rotational Seismograph
During the field test conducted in the geophysical observatory in Ksiaż, Poland, torsion and tilt effects resulting from mining seismic quakes induced by copper mining operations have been recorded by them (FOSREMs) with high accuracy

Summary

Introduction

This paper deals with an innovative sensor suitable for rotational seismology, which falls within rotational ground movements from earthquakes, explosions, and ambient vibrations [1]. These motions are interesting for several reasons and can provide additional constraints on the seismic source [2,3]. Symposium on Sensor Science (I3S2019) in Naples, Italy [15], in which we described the construction and laboratory tests, as well as results of field application of the set of two identical FOSREM® —the innovative Fiber-Optic Rotational Seismograph. During the field test conducted in the geophysical observatory in Ksiaż, Poland, torsion and tilt effects resulting from mining seismic quakes induced by copper mining operations have been recorded by them (FOSREMs) with high accuracy

Construction and Laboratory Investigation of the Fiber-Optic Rotational

Results of Laboratory Investigation

The parameters

FOSREM

Conclusions