Active Geophysical Monitoring

CHAPTER 23

DETECTION AND CONTINUOUS MONITORINGOF STRONG SEISMIC REFLECTORS AT THESUBDUCTING PHILIPPINE SEA PLATE USINGACROSS METHODOLOGY

Junzo Kasahara^a,d, Kayoko Tsuruga^a,e, Yoko Hasada^a,b,Takahiro Kunitomo^a,d, Ryoya Ikuta^c,d, Toshiki Watanabe^b,Koshun Yamaoka^b, Naoyuki Fujii^b,d, and Mineo Kumazawa^a,d

Contents

1. Introduction

2. Evaluation of the Seismic Across for Detection of Reflected Phases

3. Results

4. Discussion

5. Conclusions

Acknowledgments

References

1. INTRODUCTION

Continuous efforts to find precursors of catastrophic large earthquakes using seismic, geodetic and geochemical approaches in Japan have almost failed after an earthquake prediction program which has been going for the last 40 years. However, recent studies have revealed ...