California at Risk: Where Do We Go from Here?

1992 ◽  
Vol 8 (1) ◽  
pp. 17-34
Author(s):  
L. Thomas Tobin ◽  
Fred Turner ◽  
James F. Goodfellow ◽  
Brian L. Stoner
Keyword(s):  
At Risk ◽  
Emergency Response ◽  
Earthquake Hazard ◽  
Earthquake Hazards ◽  
Seismic Safety ◽  
Hazard Reduction ◽  
Recovery Planning ◽  
Reduction Program ◽  
Year 2000 ◽  
Risk Reducing

In 1986, the state of California embarked on a comprehensive earthquake hazard reduction program described in California at Risk: Reducing Earthquake Hazards 1987-1992. This Program identifies hazard reduction efforts for existing development, emergency response, future development, recovery planning, education, and research. The goal is to reduce the state's earthquake hazards significantly by the year 2000. This paper reviews the development of the Program, the state's progress toward hazard reduction, seismic safety legislation and refinements in the Program's second five years.

Analysis of Seismic Vulnerability - Case of Buildings of High Seismic Hazard

2014 ◽  
Vol 875-877 ◽  
pp. 416-422
Author(s):  
Abdelheq Guettiche ◽  
Mostefa Mimoune
Keyword(s):  
Seismic Risk ◽  
Seismic Vulnerability ◽  
Housing Stock ◽  
Earthquake Hazard ◽  
Seismic Survey ◽  
Survey Method ◽  
Earthquake Hazards ◽  
Physical Vulnerability ◽  
Seismic Safety ◽  
Moderate Seismicity

Seismic vulnerability of an urban environment is characterized by the ability of buildings and structures to support seismic events (physical vulnerability) and by the ability of people to behave in a consistent and rational face a major event (social vulnerability). Constantine is a city with moderate seismicity but the level of risk is high because of urban concentration and topography of the site. The seismic risk reduction therefore requires assessing the physical vulnerability of its buildings. It is proposed in this paper an analysis of a group of buildings for residential use located west of the city, consisting mainly of relatively high buildings. Following a survey of a portion of the housing stock of this city, a seismic survey method was applied based on "observations" post-seismic. Vulnerability indicators are statistically related to damage through a vulnerability index "IV" to establish curves of damage (or vulnerability). These are used to estimate the level of damage that is likely resulting in damage cards. The goal is to develop an initial database of some of the housing stock in the Constantine city (knowledge of earthquake hazards, construction defects ...) to be used in the estimation of seismic risk and verification of seismic safety of existing buildings. Keywords: Earthquake hazard; Seismic vulnerability; Constantine city; damage.

Earthquake Impacts and Hazard Adjustment by Acutely Hazardous Materials Facilities following the Northridge Earthquake

1998 ◽  
Vol 14 (2) ◽  
pp. 285-299 ◽  
Author(s):  
Michael K. Lindell ◽  
Ronald W. Perry
Keyword(s):  
Emergency Response ◽  
Emergency Preparedness ◽  
Earthquake Hazard ◽  
Hazardous Materials ◽  
Northridge Earthquake ◽  
Hazard Reduction ◽  
Hazard Adjustments ◽  
Before And After ◽  
Seismic Impacts ◽  
Site Release

Hazardous materials pose a problem of great significance for earthquake hazard reduction because severe earthquakes can simultaneously fail independent systems for on-site release mitigation and off-site emergency response. Unfortunately, the potential for major earthquake-initiated hazmat releases (EIHRs) has received little attention from earthquake researchers and planners. This study assessed the extent of on-site and off-site damage to fixed-site hazmat facilities and the hazard adjustments (i.e., hazard assessment, hazard mitigation, and emergency preparedness actions) that these facilities implemented before and after the Northridge earthquake. Data on the occurrence of chemical containment and infrastructure systems impacts confirms that hazmat facility infrastructure is vulnerable to seismic impacts. Hazard adjustments were undertaken after the earthquake, but were unrelated to the level of earthquake impact. These results suggest that comprehensive EIHR loss estimation studies should be conducted for seismic zones throughout the country, especially for clusters of hazmat facilities subject to the threat of damaging earthquakes.

scholarly journals Microzonation of the Linares, Northeast Mexico area, based on geology and shear-wave velocity measurements

2005 ◽  
Vol 44 (4) ◽  
pp. 331-340
Author(s):  
J. C. Montalvo-Arrieta ◽  
Y. Quintanilla ◽  
A. Tamez ◽  
M. Meneses ◽  
L. Ramos ◽  
...  
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Earthquake Hazard ◽  
Velocity Measurements ◽  
Nuevo Leon ◽  
Hazard Reduction ◽  
Nuevo León ◽  
Reduction Program

En este trabajo se ha definido la estructura de velocidades de ondas S (VS) y P (VP), así como el promedio de velocidades (V s30 ) para los primeros 30 metros del subsuelo, a partir de perfiles sísmicos de refracción en el área de Linares, Nuevo León, tomándose como indicador de las condiciones de sitio. Se identificaron cuatro diferentes unidades litológicas para estos 30 m de profundidad: limos con velocidades de VP y VS de 338 m/s y 221 m/s, los cuales corresponden a los valores más bajos y someros (primeros 3 m) medidos en el área; aluvión (depósitos Cuaternarios) con velocidades respectivas de VP y VS de 957 m/s y 559 m/s; conglomerados (Terciario) con velocidades de VP y VS de 2471 m/s y 1220 m/s; finalmente lutitas de la Formación Méndez (Cretácico Superior) con velocidades de VP y VS de 3195 m/s y 2149 m/s respectivamente. De acuerdo con códigos internacionales de construcción aplicados a la clasificación de suelos y rocas (por ejemplo, the National Earthquake Hazard Reduction Program, USA, por sus siglas en inglés) en el área de estudio predominan los sitios clase C ( V s30 < 760 m/s), los cuales presentan una correspondencia con los espesores máximos (≤ 16m) de sedimentos suaves observados en el área de estudio.

The Importance of Postearthquake Investigations

1986 ◽  
Vol 2 (3) ◽  
pp. 653-667
Author(s):  
Walter W. Hays
Keyword(s):  
Building Codes ◽  
Technical Knowledge ◽  
Earthquake Hazards ◽  
Seismic Safety ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Reduction Program ◽  
Critical Facilities ◽  
Earthquake Prediction Research ◽  
San Fernando

Data and technical knowledge gained from postearthquake investigations of a dozen earthquakes since the 1964 Prince William Sound, Alaska, earthquake have significantly advanced the state-of-knowledge about earthquakes. These advances have motivated new and (or) improved programs, applications, and changes in public policy, including (1) the 1977 National Earthquake Hazards Reduction Program and its extensions, (2) earthquake prediction research, (3) deterministic and probabilistic hazards assessments, (4) design criteria for critical facilities, (5) earthquake-resistant design provisions of building codes, (6) seismic safety elements, (7) seismic microzoning, (8) lifeline engineering, and (9) seismic safety organizations. To date, the 1971 San Fernando, California, earthquake has triggered more rapid advances in knowledge and applications than any other earthquake.

GIS-Based Seismic Hazard Mapping for Pipeline Integrity Management

2006 ◽  
Author(s):  
Christopher Hitchcock ◽  
Stuart Nishenko ◽  
Chih-Hung Lee ◽  
Joseph Sun ◽  
Sean Sundermann ◽  
...  
Keyword(s):  
Emergency Response ◽  
Earthquake Hazard ◽  
Hazard Mapping ◽  
Pipeline System ◽  
Earthquake Hazards ◽  
Gis Technology ◽  
System Integrity ◽  
Integrity Management ◽  
Regional Basis ◽  
Large Earthquakes

Geographic information systems (GIS) technology enables sophisticated, numerical-based mapping of earthquake hazards, including liquefaction and landslide susceptibility, on a regional basis for pipeline systems. Existing earthquake hazard mapping was integrated with interpretation of topographic, geologic, hydrologic, and geotechnical data to update an earthquake hazard database for Pacific Gas & Electric Company’s California Gas Transmission (CGT), as part of the CGT Pipeline System Integrity program. The regionally consistent, map-based database covering CGT’s pipeline system in northern California allows for modeling of possible pipeline impacts from moderate to large earthquakes. GIS-based modeling that incorporates the hazard mapping is a powerful tool for planning and emergency response purposes. Specifically, near real-time models of possible pipeline damage locations can be derived from internet-based groundshaking records (USGS ShakeMap) produced after earthquakes. Scenario-based models of earthquake impacts from possible earthquakes can be used for planning purposes.

Sign in / Sign up

Export Citation Format

Share Document