Active Geophysical Monitoring

PREFACE

 

This is the first book devoted to the variety of topics related to active geophysical monitoring, which summarizes up-to-date information on this subject. Active geophysical monitoring involves the detection and interpretation of subsurface changes in rock states and properties induced by acoustic and electromagnetic waves periodically excited by repeated controlled sources. There is a little doubt that active monitoring of time-evolving structures and states in the tectonically active lithosphere of the Earth is very important. However, no systematic analysis of continuous geophysical monitoring has been done until now because no reliable technological systems have been developed other than those generating impulsive signals (e.g., ...