DOI: 10.1785/bssa0570061221. The Parkfield, California, earthquakes of 1966

The Parkfield, California, earthquakes of 1966

10.1785/bssa0570061221

Crossref journal-article

Seismological Society of America (SSA)

Bulletin of the Seismological Society of America (790)

Abstract

Abstract The characteristics of the Parkfield, California earthquake sequence of 1966 are presented. Historically, the epicentral region is one of the three most seismic areas along the San Andreas fault in central California. It is characterized, however, by a relatively high incidence of large earthquakes in proportion to smaller shocks, compared to other active zones. The 1966 sequence occurred in an area where measured deformation across the fault for 1959-1965 shows a decrease from about 2 cm/year to the north to zero to the south of the area. Neither micro-earthquake nor normal seismic activity prior to the sequence gave indication of its coming. Seismicity before the sequence was confined to the north of the active zone, with some indication of convergence of foci toward the location of the initial shocks. The early aftershock distribution extended 20 km south of the main shock; cracking occurred to 33 km south of the main shock; and intense aftershock activity for the entire sequence extended 27 km south of the main shock. At least 95 per cent of the earthquakes, including the three largest, have P-wave radiation patterns consistent with right lateral transcurrent motion on the San Andreas fault. Earthquakes of the sequence fall very closely along the fault trace. About 75 per cent of the total strain release for the sequence can be accounted for by earthquakes in the main shock region, the principal shock (M = 5.5) contributing only 25 per cent of the total. The sequence is characterized by a high incidence of large aftershocks, an extensive area of aftershock activity, and average focal depths near 5 km-three properties apparently related, and distinguishing two types of sequence traits in central California.

Bibliography

McEvilly, T. V., Bakun, W. H., & Casaday, K. B. (1967). The Parkfield, California, earthquakes of 1966. Bulletin of the Seismological Society of America, 57(6), 1221â1244.

Authors 3

T. V. McEvilly (first)
W. H. Bakun (additional)
K. B. Casaday (additional)

References 17 Referenced 79

{'key': '2021071416514285500_BIB1', 'first-page': '966', 'article-title': 'Parkfield earthquake of June 27-29, Monterey and San Luis Obispo Counties, California preliminary report; pre-earthquake and post-earthquake surficial displacements', 'volume': '56', 'author': 'Allen', 'year': '(1966)', 'journal-title': 'Bull. Seism. Soc. Am.'} / Bull. Seism. Soc. Am. / Parkfield earthquake of June 27-29, Monterey and San Luis Obispo Counties, California preliminary report; pre-earthquake and post-earthquake surficial displacements by Allen ((1966))
10.1029/JZ072i004p01217 / J. Geoph. Res. / Scaling law of seismic spectrum by Aki ((1967))
{'key': '2021071416514285500_BIB3', 'article-title': 'Seismological Evidence on the Tectonics of Northern California and the Mendocino Escarpment', 'author': 'Bolt', 'year': '(1968)', 'journal-title': 'Bull. Seism. Soc. Am.'} / Bull. Seism. Soc. Am. / Seismological Evidence on the Tectonics of Northern California and the Mendocino Escarpment by Bolt ((1968))
{'key': '2021071416514285500_BIB4', 'first-page': '561', 'article-title': 'Computer Location of local earthquakes within the Berkeley seismographic network', 'volume': '9', 'author': 'Bolt', 'year': '(1963)', 'journal-title': 'Computers in the Mineral Industries'} / Computers in the Mineral Industries / Computer Location of local earthquakes within the Berkeley seismographic network by Bolt ((1963))
Brown R. D. Jr Vedder J. G. (1967). The Parkfield-Cholame California earthquakes of June-August 1966; surface tectonic fractures along the San Andreas Fault, U.S. Geol. Survey, Prof. Paper579.
10.1785/BSSA0250030223 / Bull. Seism. Soc. Am. / The central California earthquakes of May 16, 1933, and June 7, 1934 by Byerly ((1935))
Cloud W. K. (1966). The parkfield, California, Earthquake of June 27, 1966 Preliminary Engineering Seismological Report. U.S. Dept. Comm. (ESSA-CGS) Report; U.S. Govt. Printing Office.
Eaton J. P. (1967). The Parkfield-Cholame, California, earthquakes of June-August 1966; instrumental seismic studies, U.S. Geol. Survey Prof. Paper579. (10.3133/70039125)
10.1785/BSSA0570061245 / Bull. Seism. Soc. Am. / Love wave spectra and the mechanism of the 1966 Parkfield sequences by Filson ((1967))
{'key': '2021071416514285500_BIB10', 'article-title': 'The California Earthquake of April 18, 1906', 'volume-title': 'Report of the State Earthquake Investigation Commission', 'author': 'Lawson', 'year': '(1908)'} / Report of the State Earthquake Investigation Commission / The California Earthquake of April 18, 1906 by Lawson ((1908))
10.1785/BSSA0560030755 / Bull. Seism. Soc. Am. / The earthquake sequence of November 1964 near Corralitos, California by McEvilly ((1966))
{'key': '2021071416514285500_BIB12', 'first-page': '967', 'article-title': 'Parkfield earthquakes of June 27-29, Monterey and San Luis Obispo Counties, California—preliminary report; preliminary seismic data, June-July 1966', 'volume': '56', 'author': 'McEvilly', 'year': '(1966)', 'journal-title': 'Bull. Seism. Soc. Am.'} / Bull. Seism. Soc. Am. / Parkfield earthquakes of June 27-29, Monterey and San Luis Obispo Counties, California—preliminary report; preliminary seismic data, June-July 1966 by McEvilly ((1966))
10.1785/BSSA0570010113 / Bull. Seism. Soc. Am. / The earthquake sequence of September, 1965 near Antioch, California by McEvilly ((1967))
{'key': '2021071416514285500_BIB14', 'first-page': '5', 'article-title': 'Parkfield earthquakes June 28-29, 1966', 'volume': '37', 'author': 'Morrison', 'year': '(1966)', 'journal-title': 'Earthquake Notes'} / Earthquake Notes / Parkfield earthquakes June 28-29, 1966 by Morrison ((1966))
{'key': '2021071416514285500_BIB15', 'article-title': 'Elementary Seismology', 'author': 'Richter', 'year': '(1958)'} / Elementary Seismology by Richter ((1958))
10.1785/BSSA0290010001 / Bull. Seism. Soc. Am. / Descriptive catalog of earthquakes of the Pacific Coast of the United States, 1769 to 1928 by Townley ((1939))
Wallace R. E. Roth E. F. (1967). The Parkfield-Cholame, California, earthquakes of June-August 1966, rates and patterns of progressive deformation, U. S. Geol. Survey Prof. Paper579.

Dates

Type	When
Created	4 years, 1 month ago (July 14, 2021, 12:51 p.m.)
Deposited	4 years, 1 month ago (July 14, 2021, 12:52 p.m.)
Indexed	1 year, 1 month ago (July 23, 2024, 7:40 p.m.)
Issued	57 years, 8 months ago (Dec. 1, 1967)
Published	57 years, 8 months ago (Dec. 1, 1967)
Published Online	57 years, 8 months ago (Dec. 1, 1967)
Published Print	57 years, 8 months ago (Dec. 1, 1967)

Funders 0

None

BibTeX

@article{McEvilly_1967, title={The Parkfield, California, earthquakes of 1966}, volume={57}, ISSN={0037-1106}, url={http://dx.doi.org/10.1785/bssa0570061221}, DOI={10.1785/bssa0570061221}, number={6}, journal={Bulletin of the Seismological Society of America}, publisher={Seismological Society of America (SSA)}, author={McEvilly, T. V. and Bakun, W. H. and Casaday, K. B.}, year={1967}, month=dec, pages={1221–1244} }

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