SUMMARIES of TECHNICAL REPORTS, VOLUME X Prepared by Participants in NATIONAL EARTHQUAKE HAZARDS REDUCTION PROGRAM June 1980
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Cambridge University Press 978-1-108-44568-9 — Active Faults of the World Robert Yeats Index More Information
Cambridge University Press 978-1-108-44568-9 — Active Faults of the World Robert Yeats Index More Information Index Abancay Deflection, 201, 204–206, 223 Allmendinger, R. W., 206 Abant, Turkey, earthquake of 1957 Ms 7.0, 286 allochthonous terranes, 26 Abdrakhmatov, K. Y., 381, 383 Alpine fault, New Zealand, 482, 486, 489–490, 493 Abercrombie, R. E., 461, 464 Alps, 245, 249 Abers, G. A., 475–477 Alquist-Priolo Act, California, 75 Abidin, H. Z., 464 Altay Range, 384–387 Abiz, Iran, fault, 318 Alteriis, G., 251 Acambay graben, Mexico, 182 Altiplano Plateau, 190, 191, 200, 204, 205, 222 Acambay, Mexico, earthquake of 1912 Ms 6.7, 181 Altunel, E., 305, 322 Accra, Ghana, earthquake of 1939 M 6.4, 235 Altyn Tagh fault, 336, 355, 358, 360, 362, 364–366, accreted terrane, 3 378 Acocella, V., 234 Alvarado, P., 210, 214 active fault front, 408 Álvarez-Marrón, J. M., 219 Adamek, S., 170 Amaziahu, Dead Sea, fault, 297 Adams, J., 52, 66, 71–73, 87, 494 Ambraseys, N. N., 226, 229–231, 234, 259, 264, 275, Adria, 249, 250 277, 286, 288–290, 292, 296, 300, 301, 311, 321, Afar Triangle and triple junction, 226, 227, 231–233, 328, 334, 339, 341, 352, 353 237 Ammon, C. J., 464 Afghan (Helmand) block, 318 Amuri, New Zealand, earthquake of 1888 Mw 7–7.3, 486 Agadir, Morocco, earthquake of 1960 Ms 5.9, 243 Amurian Plate, 389, 399 Age of Enlightenment, 239 Anatolia Plate, 263, 268, 292, 293 Agua Blanca fault, Baja California, 107 Ancash, Peru, earthquake of 1946 M 6.3 to 6.9, 201 Aguilera, J., vii, 79, 138, 189 Ancón fault, Venezuela, 166 Airy, G. -
Rockwell International Corporation 1049 Camino Dos Rios (P.O
SC543.J6FR "Mads available under NASA sponsrislP in the interest of early and wide dis *ninatf of Earth Resources Survey Program information and without liaoility IDENTIFICATION AND INTERPRETATION OF jOr my ou mAOthereot." TECTONIC FEATURES FROM ERTS-1 IMAGERY Southwestern North America and The Red Sea Area may be purchased ftohu Oriinal photograPhY EROS D-aa Center Avenue 1thSioux ad Falls. OanOta So, 7 - ' ... +=,+. Monem Abdel-Gawad and Linda Tubbesing -l Science Center, Rockwell International Corporation 1049 Camino Dos Rios (P.O. Box 1085) Thousand Oaks, California 91360 U.S.A. N75-252 3 9 , (E75-10 2 9 1 ) IDENTIFICATION AND FROM INTERPRETATION OF TECTONIC FEATURES AMERICA ERTS-1 IMAGERY: SOUTHWESTERN NORTH Unclas THE RED SEA AREA Final Report, 30 May !AND1972 - 11 Feb. 1975 (Rockwell International G3/43 00291 _ May 5, 1975 , Type III Fihnal Report for Period: May 30, 1972 - February 11, 1975, . Prepared for NASAIGODDARD SPACE FLIGHT CENTER Greenbelt, Maryland 20071 Pwdu. by NATIONAL TECHNICAL INFORMATION SERVICE US Dopa.rm.nt or Commerco Snrnfaield, VA. 22151 N O T I C E THIS DOCUMENT HAS BEEN REPRODUCED FROM THE BEST COPY FURNISHED US BY THE SPONSORING AGENCY. ALTHOUGH IT IS RECOGN.IZED THAT CER- TAIN PORTIONS ARE ILLEGIBLE, IT IS-BE'ING RE- LEASED IN THE INTEREST OF MAKING AVAILABLE AS MUCH INFORMATION AS POSSIBLE. SC543.16FR IDENTIFICATION AND INTERPRETATION OF TECTONIC FEATURES FROM ERTS-1 IMAGERY Southwestern North America and The Red Sea Area Monem Abdel-Gawad and Linda Tubbesi'ng Science Center/Rockwell International Corporation 1049 Camino Dos Rios, P.O. Box 1085 Thousand Oaks, California 91360 U.S.A. -
Shape of the Subducted Rivera and Cocos Plates in Southern Mexico
JOURNALOF GEOPHYSICAL RESEARCH, VOL. 100, NO. B7, PAGES 12,357-12,373, JULY 10, 1995 Shapeof the subductedRivera and Cocosplates in southern Mexico: Seismic and tectonicimplications Mario Pardo and Germdo Sufirez Insfitutode Geoffsica,Universidad Nacional Aut6noma de M6xico Abstract.The geometry of thesubducted Rivera and Cocos plates beneath the North American platein southernMexico was determined based on the accurately located hypocenters oflocal and te!eseismicearthquakes. The hypocenters ofthe teleseisms were relocated, and the focal depths of 21 eventswere constrainedusing a bodywave inversion scheme. The suductionin southern Mexicomay be approximated asa subhorizontalslabbounded atthe edges by the steep subduction geometryof theCocos plate beneath the Caribbean plate to the east and of theRivera plate beneath NorthAmerica to thewest. The dip of theinterplate contact geometry is constantto a depthof 30 kin,and lateral changes in thedip of thesubducted plate are only observed once it isdecoupled fromthe overriding plate. On thebasis of theseismicity, the focal mechanisms, and the geometry ofthe downgoing slab, southern Mexico may be segmented into four regions ß(1) theJalisco regionto thewest, where the Rivera plate subducts at a steepangle that resembles the geometry of theCocos plate beneath the Caribbean plate in CentralAmerica; (2) theMichoacan region, where thedip angleof theCocos plate decreases gradually toward the southeast, (3) theGuerrero-Oaxac.a region,bounded approximately by theonshore projection of theOrozco and O'Gorman -
Morphotectonic Zones Along the Coast of the Pacific Continental Margin, Southern Mexico
See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/223022792 Morphotectonic zones along the coast of the Pacific continental margin, southern Mexico Article in Geomorphology · July 1999 DOI: 10.1016/S0169-555X(99)00016-1 CITATIONS READS 37 76 2 authors, including: J. Urrutia Fucugauchi Universidad Nacional Autónoma de México 542 PUBLICATIONS 18,205 CITATIONS SEE PROFILE Some of the authors of this publication are also working on these related projects: CHICAGO View project Arco magmático Pérmico relacionado con la zona de sutura Ouachita en Chihuahua, México View project All content following this page was uploaded by J. Urrutia Fucugauchi on 31 January 2014. The user has requested enhancement of the downloaded file. Geomorphology 28 Ž1999. 237–250 Morphotectonic zones along the coast of the Pacific continental margin, southern Mexico Marıa-Teresa´ Ramırez-Herrera´ a,), Jaime Urrutia-Fucugauchi b,1 a Instituto de Geografıa,´ Departamento de Geografıa´ Fısica,´ UNAM, Ciudad UniÕersitaria, C.P. 04510, Mexico, D.F., Mexico b Instituto de Geofısica,´ Laboratorio de Paleomagnetismo y Geofısica´ Nuclear, UNAM, Ciudad UniÕersitaria, C.P. 04510 Mexico, D.F., Mexico Received 15 December 1997; received in revised form 20 August 1998; accepted 22 November 1998 Abstract Geomorphic analysis, employing topographic, morphologic, geologic, and bathymetric maps, and field studies show that the morphology of the southern coast of Mexico can be linked to lateral variations in the geometry and tectonism of the subduction zone. A reconnaissance study, based on the regional morphological characteristics and correlation with seismotectonic segments, regional tectonics and major bathymetric features, allows identification of several morphotectonic zones along the coast of southern Mexico: Ž1. -
1. Introduction1
Kimura, G., Silver, E.A., Blum, P., et al., 1997 Proceedings of the Ocean Drilling Program, Initial Reports, Vol. 170 1. INTRODUCTION1 Shipboard Scientific Party2 The planet is profoundly affected by the distributions and rates of al., 1990), which extends from the Caribbean coast of Colombia to materials that enter subduction zones. The material that is accreted to Limon, Costa Rica. In Costa Rica, the boundary consists of a diffuse the upper plate results in growth of the continental mass, and fluids left lateral shear zone from Limon to the Middle America Trench squeezed out of this accreted mass have significance for biologic and (Ponce and Case, 1987; Jacob and Pacheco, 1991; Guendel and geochemical processes occurring on the margins. Material that is not Pacheco, 1992; Goes et al., 1993; Fan et al., 1993; Marshall et al., accreted or underplated to the margin bypasses surface residency and 1993; Fisher et al., 1994; Protti and Schwartz, 1994). The north- descends into the mantle, chemically affecting both the mantle and trending boundary between the Cocos and Nazca Plates is the right- magmas generated therefrom. Subduction of the igneous ocean crust lateral Panama fracture zone. West of this fracture zone is the Cocos returns rocks to the mantle that earlier had been fractionated from it Ridge, a trace of the Galapagos Hotspot, which subducts beneath the in spreading centers, along with products of chemical alteration that Costa Rican segment of the Panama Block. occur on the seafloor. Sediments that are subducted include biogenic, The Nicoya Peninsula is composed of Late Jurassic to Late Creta- volcanogenic, authigenic, and terrigenous debris. -
Garlock Fault: an Intracontinental Transform Structure, Southern California
GREGORY A. DAVIS Department of Geological Sciences, University of Southern California, Los Angeles, California 90007 B. C. BURCHFIEL Department of Geology, Rice University, Houston, Texas 77001 Garlock Fault: An Intracontinental Transform Structure, Southern California ABSTRACT Sierra Nevada. Westward shifting of the north- ern block of the Garlock has probably contrib- The northeast- to east-striking Garlock fault uted to the westward bending or deflection of of southern California is a major strike-slip the San Andreas fault where the two faults fault with a left-lateral displacement of at least meet. 48 to 64 km. It is also an important physio- Many earlier workers have considered that graphic boundary since it separates along its the left-lateral Garlock fault is conjugate to length the Tehachapi-Sierra Nevada and Basin the right-lateral San Andreas fault in a regional and Range provinces of pronounced topogra- strain pattern of north-south shortening and phy to the north from the Mojave Desert east-west extension, the latter expressed in part block of more subdued topography to the as an eastward displacement of the Mojave south. Previous authors have considered the block away from the junction of the San 260-km-long fault to be terminated at its Andreas and Garlock faults. In contrast, we western and eastern ends by the northwest- regard the origin of the Garlock fault as being striking San Andreas and Death Valley fault directly related to the extensional origin of the zones, respectively. Basin and Range province in areas north of the We interpret the Garlock fault as an intra- Garlock. -
Report of Geotechnical Investigation Proposed Improvements
REPORT OF GEOTECHNICAL INVESTIGATION PROPOSED IMPROVEMENTS PROPOSED RIO HONDO SATELLITE CAMPUS EL RANCHO ADULT SCHOOL 9515 HANEY STREET PICO RIVERA, CALIFORNIA Prepared for: RIO HONDO PROGRAM MANAGEMENT TEAM Whittier, California January 20, 2016 Project 4953-15-0302 January 20, 2016 Mr Luis Rojas Rio Hondo Program Management Team c/o Rio Hondo College 3600 Workman Mill Road Whittier, California 90601-1699 Subject: LETTER OF TRANSMITTAL Report of Geotechnical Investigation Proposed Improvements Proposed Rio Hondo Satellite Campus El Rancho Adult School 9515 Haney Street Pico Rivera, California, 90660 Amec Foster Wheeler Project 4953-15-0302 Dear Mr. Rojas: We are pleased to submit the results of our geotechnical investigation for the proposed improvements as part of the proposed Rio Hondo Satellite Campus at the El Rancho Adult School in Pico Rivera, California. This investigation was performed in general accordance with our proposal dated November 24, 2015, which was authorized by e-mail on December 15, 2015. The scope of our services was planned with Mr. Manuel Jaramillo of DelTerra. We have been furnished with a site plan and a general description of the proposed improvements. The results of our investigation and design recommendations are presented in this report. Please note that you or your representative should submit copies of this report to the appropriate governmental agencies for their review and approval prior to obtaining a permit. Correspondence: Amec Foster Wheeler 6001 Rickenbacker Road Los Angeles, California 90040 USA -
City of Monrovia General Plan General Plan Safety Element Safety
City of Monrovia General Plan Safety Element Adopted June 12, 2002 Resolution No. 2002-40 Safety Element City of Monrovia Table of Contents I. Introduction ............................................................................................................................... 1 II. Seismic Activity ......................................................................................................................... 2 A. Background......................................................................................................................... 2 1. Geologic Setting............................................................................................................ 2 2. The Alquist-Priolo Earthquake Fault Zone Act ............................................................. 2 Major Faults .................................................................................................................. 3 B. Goals, Objectives and Policies - Seismic Activity............................................................... 9 III. Flood Control........................................................................................................................... 11 A. Background....................................................................................................................... 11 1. Setting ......................................................................................................................... 11 2. Mud and Debris Flows ............................................................................................... -
Geometry and Seismic Properties of the Subducting Cocos Plate in Central Mexico Y
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 115, B06310, doi:10.1029/2009JB006942, 2010 Click Here for Full Article Geometry and seismic properties of the subducting Cocos plate in central Mexico Y. Kim,1 R. W. Clayton,1 and J. M. Jackson1 Received 31 August 2009; revised 22 December 2009; accepted 25 January 2010; published 17 June 2010. [1] The geometry and properties of the interface of the Cocos plate beneath central Mexico are determined from the receiver functions (RFs) utilizing data from the Meso America Subduction Experiment (MASE). The RF image shows that the subducting oceanic crust is shallowly dipping to the north at 15° for 80 km from Acapulco and then horizontally underplates the continental crust for approximately 200 km to the Trans‐ Mexican Volcanic Belt (TMVB). The crustal image also shows that there is no continental root associated with the TMVB. The migrated image of the RFs shows that the slab is steeply dipping into the mantle at about 75° beneath the TMVB. Both the continental and oceanic Moho are clearly seen in both images, and modeling of the RF conversion amplitudes and timings of the underplated features reveals a thin low‐velocity zone between the plate and the continental crust that appears to absorb nearly all of the strain between the upper plate and the slab. By inverting RF amplitudes of the converted phases and their time separations, we produce detailed maps of the seismic properties of the upper and lower oceanic crust of the subducting Cocos plate and its thickness. High Poisson’s and Vp/Vs ratios due to anomalously low S wave velocity at the upper oceanic crust in the flat slab region may indicate the presence of water and hydrous minerals or high pore pressure. -
Redacted for Privacy Abstract Approved: John V
AN ABSTRACT OF THE THESIS OF MIAH ALLAN BEAL for the Doctor of Philosophy (Name) (Degree) in Oceanography presented on August 12.1968 (Major) (Date) Title:Batymety and_Strictuof_thp..4rctic_Ocean Redacted for Privacy Abstract approved: John V. The history of the explordtion of the Central Arctic Ocean is reviewed.It has been only within the last 15 years that any signifi- cant number of depth-sounding data have been collected.The present study uses seven million echo soundings collected by U. S. Navy nuclear submarines along nearly 40, 000 km of track to construct, for the first time, a reasonably complete picture of the physiography of the basin of the Arctic Ocean.The use of nuclear submarines as under-ice survey ships is discussed. The physiography of the entire Arctic basin and of each of the major features in the basin are described, illustrated and named. The dominant ocean floor features are three mountain ranges, generally paralleling each other and the 40°E. 140°W. meridian. From the Pacific- side of the Arctic basin toward the Atlantic, they are: The Alpha Cordillera; The Lomonosov Ridge; andThe Nansen Cordillera. The Alpha Cordillera is the widest of the three mountain ranges. It abuts the continental slopes off the Canadian Archipelago and off Asia across more than550of longitude on each slope.Its minimum width of about 300 km is located midway between North America and Asia.In cross section, the Alpha Cordillera is a broad arch rising about two km, above the floor of the basin.The arch is marked by volcanoes and regions of "high fractured plateau, and by scarps500to 1000 meters high.The small number of data from seismology, heat flow, magnetics and gravity studies are reviewed.The Alpha Cordillera is interpreted to be an inactive mid-ocean ridge which has undergone some subsidence. -
Structure of Central and Southern Mexico from Velocity and Attenuation Tomography Ting Chen1 and Robert W
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 117, B09302, doi:10.1029/2012JB009233, 2012 Structure of central and southern Mexico from velocity and attenuation tomography Ting Chen1 and Robert W. Clayton1 Received 13 February 2012; revised 18 June 2012; accepted 20 July 2012; published 5 September 2012. [1] The 3D Vp, Vp/Vs, P- and S-wave attenuation structure of the Cocos subduction zone in Mexico is imaged using earthquakes recorded by two temporary seismic arrays and local stations. Direct P wave arrivals on vertical components and direct S wave arrivals on transverse components from local earthquakes are used for velocity imaging. Relative delay times for P and PKP phases from teleseismic events are also used to obtain a deeper velocity structure beneath the southern seismic array. Using a spectral-decay method, we calculate a path attenuation operator t* for each P and S waveform from local events, À1 À1 and then invert for 3D spatial variations in attenuation (Qp and Qs ). Inversion results reveal a low-attenuation and high-velocity Cocos slab. The slab dip angle increases from almost flat in central Mexico near Mexico City to about 30 in southern Mexico near the Isthmus of Tehuantepec. High attenuation and low velocity in the crust beneath the Trans-Mexico Volcanic Belt correlate with low resistivity, and are probably related to dehydration of the slab and melting processes. The most pronounced high-attenuation, low-Vp and high-Vp/Vs anomaly is found in the crust beneath the Veracruz Basin. A high-velocity structure dipping into the mantle from the side of Gulf of Mexico coincides with a discontinuity from a receiver functions study, and provides an evidence for the collision between the Yucatán Block and Mexico in the Miocene. -
The Research Results Described in the Following Summaries Were Submitted by the Investigators on May 10, 1984 and Cover the 6-Mo
The research results described in the following summaries were submitted by the investigators on May 10, 1984 and cover the 6-months period from October 1, 1983 through May 1, 1984. These reports include both work performed under contracts administered by the Geological Survey and work by members of the Geological Survey. The report summaries are grouped into the three major elements of the National Earthquake Hazards Reduction Program. Open File Report No. 84-628 This report has not been reviewed for conformity with USGS editorial standards and stratigraphic nomenclature. Parts of it were prepared under contract to the U.S. Geological Survey and the opinions and conclusions expressed herein do not necessarily represent those of the USGS. Any use of trade names is for descriptive purposes only and does not imply endorsement by the USGS. The data and interpretations in these progress reports may be reevaluated by the investigators upon completion of the research. Readers who wish to cite findings described herein should confirm their accuracy with the author. UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY SUMMARIES OF TECHNICAL REPORTS, VOLUME XVIII Prepared by Participants in NATIONAL EARTHQUAKE HAZARDS REDUCTION PROGRAM Compiled by Muriel L. Jacobson Thelraa R. Rodriguez CONTENTS Earthquake Hazards Reduction Program Page I. Recent Tectonics and Earthquake Potential (T) Determine the tectonic framework and earthquake potential of U.S. seismogenic zones with significant hazard potential. Objective T-1. Regional seismic monitoring........................ 1 Objective T-2. Source zone characteristics Identify and map active crustal faults, using geophysical and geological data to interpret the structure and geometry of seismogenic zones.