Active Geophysical Monitoring

CHAPTER 13

SECONDARY CALIBRATION METHOD OF SEISMOMETERS BY UTILIZING ACROSS SIGNAL

Kayoko Tsuruga^a,d, Mineo Kumazawa^a,b, Takahiro Kunitomo^a,c,Naotaka Shigeta^a, and Junzo Kasahara^a,c,d

Contents

1. Introduction

2. Basic Concept and Method of Analysis

2.1. Basic concept of the current method

2.2. Major features

2.3. Model for the motion of the vibration table and the frequency response model of the seismometer

3. Experimental Measurements

4. Results and Interpretation

5. Discussion

6. Conclusions

Acknowledgments

References

1. INTRODUCTION

One of major tasks for active seismic monitoring is to detect temporal changes in the Earth’s interior because the precursory phenomena in the seismogenic zones may be caused by any physical property change. In ...