Agnew, Duncan Carr and Sieh, Kerry E.
(1978)
A documentary study of the felt effects of the great California earthquake of 1857.
Bulletin of the Seismological Society of America, 68
(6).
pp. 1717-1729.
ISSN 0037-1106.
https://resolver.caltech.edu/CaltechAUTHORS:20140916-070456790
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Abstract
We have collected over 60 hitherto unpublished accounts of the California earthquake of January 9, 1857. We have used them, together with those already known, to estimate felt intensities and prepare an isoseismal map which roughly indicates the level of short-period ground motion experienced during this earthquake. Modified Mercalli intensities of VI to VII occurred in the modern metropolitan areas of southern California, and VI to VIII in the southern San Joaquin Valley. The intensity along the fault was IX or more. Instances of seiching, fissuring, sandblows, and hydrologic changes were reported from Sacramento to the Colorado River delta. Most reports say that shaking lasted between one and three minutes. At least two large aftershocks occurred within a week of the main event.
| Item Type: | Article |
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| Additional Information: | © 1978 Seismological Society of America.
Manuscript received June 9, 1978.
We owe particular thanks to Dan Burd, who searched through a great number of possible sources in
order to find many of those that we have used here.
Many historians and librarians have helped us in our search for information. We gratefully acknowledge
the help of W. Harland Boyd, Lori Davisson, the late Maynard Geiger O.F.M., Roberta Nichols, Virginia
Rust, Marilyn Seifert, Helen Uliberry, Richard S. Whitehead, and members of the staffs of the Bancroft
Library, the California State Library, the Historical Department of the Church of Jesus Christ of Latter-Day Saints, the National Archives, the Periodical Division of the Library of Congress, and the Serra
Museum Library. Laurie Sieh, Carlos Salvado, Alejandro Nava, and George E. Agnew helped produce
our translations from the Spanish. We offer special thanks to Clarence Allen and Rodman W. Paul, who
provided the encouragement to begin this project.
This work has been supported with funds provided by the California Institute of Technology (Division
of Geological and Planetary Sciences), U.S. Geological Survey Contracts 14-08-0001-15225 and 14-08-0001-16774, NASA Grant NGR 05-009-246, and Mr. and Mrs. George E. Agnew. |
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| Funders: | | Funding Agency | Grant Number |
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| Caltech Division of Geological and Planetary Sciences | UNSPECIFIED | | USGS | 14-08-0001-15225 | | USGS | 14-08-0001-16774 | | NASA | NGR 05-009-246 | | Mr. and Mrs. George E. Agnew | UNSPECIFIED |
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| Other Numbering System: | | Other Numbering System Name | Other Numbering System ID |
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| Caltech Division of Geological and Planetary Sciences | 3055 |
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| Issue or Number: | 6 |
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| Record Number: | CaltechAUTHORS:20140916-070456790 |
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| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140916-070456790 |
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| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
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| ID Code: | 49734 |
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| Collection: | CaltechAUTHORS |
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| Deposited By: |
Tony Diaz
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| Deposited On: | 16 Sep 2014 18:45 |
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| Last Modified: | 09 Mar 2020 13:19 |
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