James E. Lundy Masters Thesis Table of Contents

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Seismic Coupling Along the New Hebrides Trench

James E. Lundy, Masters Thesis May 1998

Table of Contents

Abstract

List of Tables

List of Figures

1.0. Introduction

2.0. Plate Motion Data

2.1. Regional Convergence Data

2.2. Local Convergence Data

2.3. Comparison of Plate Motion Vectors

3.0. Seismicity Data

3.1. Harvard Centroid-Moment Tensor Catalog

3.2. Search of the HCMT Catalog

3.3. Abe's Earthquake Catalog

3.4. Search of Abe's Earthquake Catalog

3.5. Additional Seismicity Information

3.6. Summary of Seismicity Information

4.0. Fault Rupture and Slip Modeling

4.1. Earthquake Fault Rupture and Slip Modeling

4.2. Seismic Moment Release

4.3. Fault Model Parameter Selection

4.4. Event Slip Accumulation

5.0. Discussion

6.0. Conclusion

Appendix

Appendix A1. Geometrical Projection of Event Epicenters

Appendix A2. Harvard Centroid-Moment Tensor Catalog Data

Appendix A3. Abe's Catalog Data

Appendix A4. Seismicity Data from Chinn and Isacks

Bibliography

Vita

List of Tables

Table 1: Regional plate convergence vectors

Table 2: Local plate convergence vectors

Table 3: Classification of events from the HCMT catalog

Table 4: Classification of events from Abe's catalog

Table 5: Event moment breakdown

Table 6: Example calculations of fault radius and slip

List of Figures

Figure 1: Bathymetry of Vanuatu and nearby area

Figure 2: Vanuatu island sites with motion vectors

Figure 3: Earthquakes from the HCMT catalog

Figure 4: Triangle diagram of HCMT earthquakes

Figure 5: HCMT reverse earthquake focal depth profile along trench axis

Figure 6: HCMT reverse earthquake depths and distances

Figure 7: Earthquakes from Abe's catalog and additional source

Figure 8: Event size comparison

Figure 9: Earthquake average stress drops

Figure 10: Comparison of average stress drops

Figure 11: HCMT rupture fault plane view

Figure 12: Abe and additional seismicity rupture fault plane view

Figure 13: Slip accumulation diagram

Figure 14: Annualized accumulated seismic slip

Figure 15: Seismic slip, GPS convergence and seismicity

Figure 16: Tectonics along the New Hebrides Trench

Figure 17: Geometrical projection of event epicenters