DEPARTMENT OF THE INTERIOR

U.S. GEOLOGICAL SURVEY

INVENTORY OF LANDSLIDES TRIGGERED BY THE

1994 NORTHRIDGE, CALIFORNIA EARTHQUAKE

by

Edwin L. Harp (1) and Randall W. Jibson (1)

Open-File Report 95-213

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

(1) USGS Denver, CO 80225

1995

TABLE OF CONTENTS

COVER PAGE

ABSTRACT

INTRODUCTION

MAPPING LANDSLIDES TRIGGERED BY THE EARTHQUAKE

DISTRIBUTION AND TYPES OF LANDSLIDES TRIGGERED

• Shallow, Disrupted Landslides

• Deep, Coherent Landslides

  • San Martinez Grande Landslide
  • Rancho Camulos Landslide
  • Loma Verde Landslide
  • Ramona Oil Field Landslide
  • Las Virgenes Canyon Landslide
  • Deep-Seated Landslides in the Santa Monica Mountains

• Failures in Artificial fill

  EFFECTS FROM EARTHQUAKE-TRIGGERED LANDSLIDES

  ONGOING RESEARCH

  ACCESSING DIGITAL FILES OF THE LANDSLIDE MAPS (PLATES 1 AND 2)

  DISCLAIMER

  ACKNOWLEDGMENTS

  REFERENCES

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