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principles and applications of microearthquake networks

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Contents<br />

FOREWORD<br />

PREFACE<br />

vii<br />

ix<br />

1. Introduction<br />

1.1. Historical Development<br />

1.2. Overview <strong>and</strong> Scope<br />

1<br />

9<br />

2. Instrumentation Systems<br />

2.1. General Considerations<br />

2.2. The USGS Central California Microearthquake Network<br />

2.3. Other L<strong>and</strong>-Based Microearthquake Systems<br />

2.4. Ocean-Based Microearthquake Systems<br />

15<br />

23<br />

39<br />

41<br />

3. Data Processing Procedures<br />

3.1. Nature <strong>of</strong> Data Processing<br />

3.2. Record Keeping<br />

3.3. Event Detection<br />

3.4. Event Processing<br />

3.5. Computing Hypocenter Parameters<br />

46<br />

49<br />

50<br />

60<br />

70<br />

4. Seismic Ray Tracing for Minimum Time Path<br />

4.1.<br />

4.2.<br />

4.3.<br />

4.4.<br />

Elastic Wave Propagation in Homogeneous <strong>and</strong> Heterogeneous Media<br />

Derivation <strong>of</strong> the Ray Equation<br />

Numerical Solutions <strong>of</strong> the Ray Equation<br />

Computing Travel Time, Derivatives, <strong>and</strong> Take-Off Angle<br />

76<br />

78<br />

82<br />

89<br />

V

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