Displacements on tectonic ruptures in the San Fernando earthquake of February 9, 1971 discussion and some implications by Robert V. Sharp

Cover of: Displacements on tectonic ruptures in the San Fernando earthquake of February 9, 1971 | Robert V. Sharp

Published by U.S. Dept. of the Interior, Geological Survey in Menlo Park, Calif .

Written in English

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Subjects:

  • Faults (Geology) -- California -- San Fernando.

Edition Notes

Book details

Statementby Robert V. Sharp.
SeriesOpen-file report -- 81-668., Open-file report (Geological Survey (U.S.)) -- 81-668.
ContributionsGeological Survey (U.S.)
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL17653760M

Download Displacements on tectonic ruptures in the San Fernando earthquake of February 9, 1971

This report discusses data on displacement of the ground surface along tectonic ruptures of the February 9, earthquake in San Fernando, California. The data were published in a paper by the author in Bulletin of the California Division of Mines and Geology, pages Cited by: 3.

Get this from a library. Displacements on tectonic ruptures in the San Fernando earthquake of February 9, discussion and some implications. [Robert V Sharp; Geological Survey (U.S.)]. The San Fernando, California, earthquake of February 9, ; a preliminary report published jointly by the U.S. Geological Survey and the National Oceanic and Atmospheric Administration Series title Professional PaperAuthor: U.S.

Geological Survey. The faulting process of the San Fernando earthquake of February 9, has been investigated using the following seismic and geodetic data: vertical and horizontal displacements, strain and tilt changes, dynamic ground motions in the near-field, focal mechanism, spatial distribution of aftershocks and features of surface fault letoitdebois.com by: The San Fernando, California, earthquake of February 9, a preliminary report published jointly by the U.S.

Geological Survey and the National Oceanic and Atmospheric Administration by Geological Survey (U.S.) ; United letoitdebois.com: The main shock of letoitdebois.com Fernando earthquake series occurred on Febru- ary 9,in the tectonically active Transverse ranges structural province of Southern California.

Immediately following the main shock, the aftershock region was inundated. The February 9, San Fernando earthquake: A study of source finiteness in teleseismic body waves Bulletin of the Seismological Society of America The 3 DecemberPasadena earthquake (M L = ) recorded with the very broadband system in PasadenaCited by: "Preliminary Seismological and Geological Studies of the San Fernando, California, Earthquake of February 9,‎ Appears in 17 books from Page 20 - Richter, CF, and Nordquist, JM, "Relationship Between Seismicity and Geologic Structure in the Southern California Region," Bulletin of the Seismological Society of America, vol.

The two geologists Carl Wentworth and Robert Yerkes from the US Geological Survey in Pasadena later wrote that "the San Fernando fault was discovered to be active only when it ruptured the ground surface on February 9, It is evident, however, that more faults in the San Fernando Valley area may be active today than are now recognized.".

The San Fernando earthquake occurred on February 9 at am Pacific Standard Time ( UTC) with a strong ground motion duration of about 12 seconds. The origin of faulting was located five miles north of the San Fernando letoitdebois.com affected: Greater Los Angeles Area.

INTRODUCTION The February 9, San Fernando, California earthquake was accom panied by both vertical and horizontal movements of an almost spectacular nature that included vertical offsets of up to about 1 m and left-lateral dis placements of roughly equal amount along the principal tectonic rupture zones produced during this shock (U.S.

Geological Survey,pp. ).Cited by: this earthquake were found to be x letoitdebois.com and 40 to 65 bars, respec- tively. INTRODUCTION The San Fernando earthquake of February 9,with a magnitude ofoccurred in the midst of a dense seismographic network in southern California.

Extensive seismic. Oct 23,  ·.during the San Fernando earthquake of February 9, Ground ruptures, with horizontal and vertical displacements measured in feet, occurred across the southeastern half of the site.

The movements were related to a larger elongate zone of tectonic ground displacement on the Olive View fault during prehistoric time. Recurrence of an. INTRODUCTION The February 9, San Fernando, California earthquake was accom- panied by both vertical and horizontal movements of an almost spectacular nature that included vertical offsets of up to about l m and left-lateral dis- placements of roughly equal amount along the principal tectonic rupture zones produced during this shock (U.S.

Geological Survey,pp. ).Cited by: The San Fernando, California, earthquake of February 9, a preliminary report published jointly by the U.S. Geological Survey and the National Oceanic and Atmospheric Administration. The accuracy of teleseismic estimates of moment, fault area, dislocation and stress drop was tested for the case of a thrust fault: the San Fernando, California, earthquake of February 9, the san fernando earthquake An hour before sunrise, at AM, PST, on February 9,the San Fernando region was struck by one of the most devastating earthquakes in California history.

Although the Richter magnitude of the tremblor wasranking it as moderate to large, but not great, it shook a wide, heavily populated area. The exact Cagniard-de Hoop solutions for a point dislocation in half-space are used to construct models of the strong ground motion observed during the February 9, San Fernando earthquake (M.

The accelerograph at Pacoima dam, located about 5 km (5 mi.) south of the epicenter of the San Fernando earthquake, recorded a maximum horizontal acceleration somewhat greater than that of gravity ( g on the S16°E horizontal component) [9].

Figure a (top). Reverse fault in the San Fernando Valley, California, formed during the Sylmar Earthquake of February 9, Fault extends from left to right. Buckling of sidewalk indicates compression; fault dips away from viewer.

Hanging wall (in background) was at same level as footwall (in foreground) before the earthquake. San Fernando Earthquake of February 9, Lessons From a Moderate Earthquake on the Fringe of a Densely Populated Region Get This Book MyNAP members save 10% online.

Login or. Because of its consequences, the San Fernando earthquake was a major earthquake from the engineering point of view, even though it was only a moderate shock in seismological terms.

As a result of the many effects of the earthquake, a large number of detailed studies and reports will be forthcoming from a wide variety of sources, and the papers collected in this volume are only preliminary.

The San Fernando earthquake, also known as Sylmar earthquake, struck the San Fernando Valley near Sylmar at a.m. PST on February 9,with a magnitude of Rescue efforts at. Download a PDF of "San Fernando Earthquake of February 9, " by the National Research Council for free.

Download a PDF of "San Fernando Earthquake of February 9, " by the National Research Council for free.

Copy the HTML code below to embed this book. Jun 01,  · Determination of effective tectonic stress associated with earthquake faulting, the Tottori earthquake of Faulting process of the San Fernando earthquake of February 9, inferred from static and dynamic near-field displacements, two dimensional moving dislocation in an elastic half-space with application to the San Fernando Cited by: Northridge Earthquake Rupture Models Based on the Global Positioning System Measurements The 17 January Northridge earthquake occurred in the San Fernando Valley, California, a densely populated ping Santa Susana fault responsible for the Sylmar earthquake and the south-dipping "Northridge" fault.

Stud- ies by Davis and Namson. Aug 01,  · To examine the effects of different earthquake sources, ground motion near the rupture for several dislocation models has been calculated. Quite diffe We use cookies to enhance your experience on our letoitdebois.com continuing to use our website, you are agreeing to our use of letoitdebois.com by: SAN FERNANDO, CALIFORNIA EARTHQUAKE OF FEBRUARY 9, Volume III, Geological and Geophysical Studies [Murphy Leonard M.] on letoitdebois.com *FREE* shipping on qualifying letoitdebois.com: Murphy Leonard M.

THE VAN NORMAN RESERVOIRS AREA, NORTHERN SAN FERNANDO VALLEY, CALIFORNIA Geologic Environment of the Van Norman Reservoirs Area By R. Yerkes, M. Bonilla, T. Youd, and J.

Sims ABSTRACT The upper and lower Van Norman dams, in northwestern­ most San Fernando Valley about 20 mi (32 km) northwest ofCited by: 2. Nov 19,  · Coseismic surface ruptures during desctructive earthquakes ( Kocaeli–Düzce, Turkey and Chi-Chi, Taiwan) have caused devastating effects on buildings and infrastructures.

Surface rupture remains a complicated phenomenon involving variable movements along near surface traces of both primary and secondary faults. The surface rupture patterns observed in nature, the rupture Author: B. Avar, N. Hudyma. accommodate significant displacements associated with fault rupture.

Design and Criteria Loads Figure 1 Surface thrust faulting in San Fernando Earthquake. Steinbrugge Collection, Earthquake Engineering Research Center, University of California, Berkeley.

Figure 2 Thrust faulting through Shihkang Dam in Chi-Chi earthquake in Taiwan. FEBRUARY 9, (M=) The San Fernando earthquake of February 9,ranks as one of the most serious California earthquakes in historical time.

The event claimed 58 lives and caused more than half a billion dollars in property damage, including the destruction of two hospitals, a freeway interchange, and the Van Norman Dam. The Sylmar Earthquake ruptured the San Fernando Reverse Fault, buckling sidewalks and raising the ground, as shown in Figure a.

The Chi-Chi, Taiwan, Earthquake was accompanied by surface rupture on a reverse fault, including the rupture across. Other recent earthquakes that have affected the United States include the Feb.,movement of the San Fernando fault near Los Angeles. It rocked the area for 10 sec, thrust parts of mountains 8 ft ( m) upward, killed 64 persons, and caused damage amounting to $ million.

Feb 17,  · Sylmar, located in the San Fernando Valley of Southern California, was suprised by the Febuary 9, earthquake. The earthquake was a surprise because they did not know of the thrust faults that lay under the San Fernando Valley. earthquake has been assigned a magnitude of with an epicenter located about km north west of the dam site.

Lessons 1: Embankment dams with low degree of compaction are vulnerable to earthquakes. During San Fernando earthquake, M=February 9, a major slide has occurred in the upstream slope of the Lower San Fernando Dam.

A fact from this article was featured on Wikipedia's Main Page in the On this day section on February 9, Material from San Fernando earthquake was split to Sierra Madre Fault Zone on19 March from this version.

EARTHQUAKE ENGINEERING A N D STRUCTURAL DYNAMICS, VOL. 6, () ASEISMIC DESIGN IMPLICATIONS OF NEAR-FAULT SAN FERNANDO EARTHQUAKE RECORDS VITELMO V. BERTERO, STEPHEN A. MAHIN AND RICARDO A. HERRERA* Department of Civil Engineering, University of California, Berkeley, California U.S.A.

SUMMARY Near-fault records of the San Fernando earthquake. Jungels, P. and Frazier, G. (), Finite element analysis of the residual displacements for an earthquake rupture’ Source parameters for the San Fernando earthquake, J. Geophys. Res. 78, – CrossRef Google ScholarCited by: 2. DRAFT PROGRAM EIR February GEOLOGY AND SOILS north could cause simultaneous ruptures on reverse faults south of the San Gabriel Mountains.

Fault ( Whittier Narrows earthquake), the Sierra Madre Fault ( San Fernando earthquake), and the Raymond Fault ( Pasadena earthquake). San Fernando Earthquake - - February 9, San Fernando Earthquake, This destructive earthquake occurred in a sparsely populated area of the San Gabriel Mountains, near San Fernando.

It lasted about 60 seconds, and, in that brief span of time, took 65 lives, injured more than 2, and caused property damage estimated at $ million.May 15,  · Analyses of ground motion caused by recent thrust (reverse) and normal earthquakes have tended to reinforce this letoitdebois.com Northridge earthquake produced systematically higher ground motion on the hanging wall than on the footwall (), and the San Fernando earthquake caused systematically greater damage and soil disturbance on the hanging wall ().Cited by: The San Fernando earthquake of February 9,was a geologic phenomenon not unlike many similar earthquakes that occur every year around the world.

Within the southern California region alone, the historic record suggests that an earthquake of about this magnitude occurs on the average of once every four years (Fig.

1, Table 1), and in.

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