Active Geophysical Monitoring

CHAPTER 5

DETECTION OF TRANSIENT PHENOMENA DUE TO ACTIVE SCATTERERS

Naoyuki Fujii^a,b and Mineo Kumazawa^b,c

Contents

1. Introduction

2. Structure Sensitivity of a Medium

2.1. Examples of structure sensitive property

2.2. Active scatterers in the earth’s interior

3. Observables of Active Scatterers

3.1. Scattering characteristics of active scatterers

3.2. Anisotropy and dispersion of active scatterers

3.3. Temporal variations of reflectors at subducting boundary

4. Discussions and Conclusions

Acknowledgments

References

1. INTRODUCTION

One of the most essential targets of our concern is the constant monitoring and detection of temporal changes of the physical state of the media at and around the anticipated focal region of disastrous earthquakes ...