THE 1872 EARTHQUAKE
SIGNIFICANT DATA AND CONCLUSIONS
Prepared for
UNITED ENGINEERS & CONSTRUCTORS, INC.
By
WESTON GEOPHYSICAL RESEARCH, INC.
DECEMBER, 1976
TABLE OF CONTENTS
INTRODUCTION 1
EPICENTRAL INTENSITY 1
EPICENTRAL LOCATION 2
Isoseismal and Soils Failure and Data 2
Aftershock Data 3
Conclusion 3
References 5
TABLE 1 COMPILATION AND EVALUATION OF FELT REPORTS
TABLE 2 COMMENTS ON SELECTED LOCALITIES Not yet scanned, of some interest RSL, 8/5/99
Plate 1 Distribution of Intensity
Plate 11 Location of Landslides and Soils Effects
Plate 111 Aftershocks
Plate IV Index of Pacific Northwest Newspapers:
18 72-1 87 4
Plates I Through IV At End Of Report
Figure 1 Regional Physiographic Map Showing
Epicentral Location After Milne (1956)
Figure 2 ERTS Imagery and Earthquakes
Figure 3 Intensity - Felt Area Relation
APPENDIX A DOCUMENTATION OF FELT REPORTS: WASHINGTON
BRITISH COLUMBIA, OREGON, IDAHO, MONTANA,
ALBERTA
APPENDIX B 200 MILE LIST A list of earthquakes within 200 miles of Project 1?, similar to WPPSS Nuclear Project No. 1, 1300 MW Nuclear Power Plant, Vol. 2A.
1977
Table 2R-E9; Not scanned, of limited interest RSL 8/5/99
APPENDIX C ACCOUNTS RELATING TO LANDSLIDES AND SOILS
EFFECTS
APPENDIX D ACCOUNTS RELATING TO AFTERSHOCKS
APPENDIX E REFERENCES AND BIBLIOGRAPHY Not scanned, about 50 pages long
RSL 8/5/99