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Damage and Restoration of Geodetic Infrastructure
Caused by the 1994 Northridge, California, Earthquake

Kathleen M. Hodgkinson, Ross S. Stein, Kenneth W. Hudnut, Jay Satalich and John H. Richards*

[click on map for medium resolution image (284 kB)]
[click HERE for high resolution image (4.1 MB)]

EXECUTIVE SUMMARY

INTRODUCTION

1. LEVELING ANALYSIS
2. MODELING OF THE EARTHQUAKE DEFORMATION
3. FINDINGS
4. VALUE OF THE REPORT
5. RECOMMENDATIONS
6. REFERENCES

APPENDICES
Detailed Table of Contents

^*Author Associations

This report is preliminary and has not been reviewed for conformity with U. S. Geological Survey editorial standards. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U. S. Government.

This report recommends improving our ability to assess and restore damaged infrastructure after future earthquakes by increasing efforts to precisely monitor engineered structures. With Los Angeles County, the USGS is now in the second year of a pilot study, GPS monitoring of Pacoima Dam. New GPS and computing technologies make very high precision, near real-time monitoring of critical engineered structures possible.