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Author: John Joseph Clague
Publisher:
ISBN: 9780662341130
Category : Earthquakes
Languages : en
Pages : 44
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Book Description
Nine moderate to large (magnitude 6-7) earthquakes have occurred in southwestern British Columbia and northwestern Washington in the last 130 years. Vancouver is at great risk from earthquakes because important infrastructure, including energy and transportation lifelines, probably would be damaged or destroyed by landslides and liquefaction-induced ground failure. The primary objective of this report is to evaluate the earthquake threat to the populated south-coastal region of British Columbia based on historic seismicity and geologic evidence. A secondary objective is to show how geologic information contributes to a better understanding of earthquake hazards and risk in the region.
Author: John Joseph Clague
Publisher:
ISBN: 9780662341130
Category : Earthquakes
Languages : en
Pages : 44
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Book Description
Nine moderate to large (magnitude 6-7) earthquakes have occurred in southwestern British Columbia and northwestern Washington in the last 130 years. Vancouver is at great risk from earthquakes because important infrastructure, including energy and transportation lifelines, probably would be damaged or destroyed by landslides and liquefaction-induced ground failure. The primary objective of this report is to evaluate the earthquake threat to the populated south-coastal region of British Columbia based on historic seismicity and geologic evidence. A secondary objective is to show how geologic information contributes to a better understanding of earthquake hazards and risk in the region.
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Author: J. J. (John Joseph) Clague
Publisher: Vancouver: Geological Survey of Canada
ISBN:
Category :
Languages : en
Pages :
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Author: Geological Survey of Canada
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 102
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Book Description
The historical and geological record indicate that the earthquake hazard in south-western British Columbia is relatively high. This bulletin presents results of a major paleoseismological investigation consisting of several related interdisciplinary studies that extend the seismic record of the region into prehistory. Three introductory sections contain background material on the region's geologic and tectonic setting, earthquake sources, historical seismicity, and research methods used. This is followed by four sections summarizing paleoseismological research on the following indicators of possible past earthquakes: sea level changes, tsunamis and their deposits, liquefaction of ground, and landslides. The final sections are concerned with seismic hazards (ground motion, ground rupture, subsidence and flooding, tsunamis and seiches, liquefaction, landslides) and analysis of risk and recurrence of earthquakes.
Author: Michael A. Fisher
Publisher: Geological Survey (USGS)
ISBN:
Category : Nature
Languages : en
Pages : 40
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Author: Brittany Jennifer Schina
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Southern Vancouver Island, situated on Canada's West Coast, is exposed to many natural and human-made threats due to its physical geography and demography. Perceptions of these disaster risks and of seismic hazard, in particular, were surveyed through locally-administered questionnaires conducted with 105 members of the general public and 13 emergency managers living and working on southern Vancouver Island, specifically in the Cowichan Valley Regional District (CVRD) and the Capital Regional District (CRD). Perhaps the greatest risk to the region, and that, which is perceived by both the general public and practitioners as the greatest risk, is low frequency, high consequence earthquake events. The region is exposed to earthquakes from many sources, but has not experienced a damaging quake in several decades, begging questions as to whether residents consider earthquake a prominent threat and whether they have an accurate appreciation for the earthquake hazard (likelihood) in the region. While researchers have scientifically quantified the earthquake hazard in the region for over 50 years, only in the past 10 years has this hazard information been presented in a format that is comprehensible by the general public. In order for individuals and communities to make informed decisions, this information must ultimately reach the public and be interpretable and actionable. This research describes and analyzes disaster risk and seismic hazard perception on Southern Vancouver Island, and identifies whether there are gaps in communication between the scientists who create the knowledge, the emergency managers who disseminate the information, and the general public who ultimately needs to act on the information to increase their resilience. Results reveal that earthquakes are perceived as the highest disaster risk among both the general public and emergency managers on southern Vancouver Island, and that a large majority of participants know that their community is at risk from an earthquake. In addition, while emergency managers consider mostly natural threats to be significant risks, the general public more commonly identify human-made intentional threats as significant risks. The study also found that gender and location influence how individuals prefer to receive hazard information. In addition, household income and time spent living on Vancouver Island are key variables for how likely members of the general public are to be prepared. Findings suggest that while both emergency managers and the general public overestimate the earthquake hazard on southern Vancouver Island, on average emergency managers perceive the earthquake hazard to be greater than the general public does. Interestingly, general public respondents in the CVRD perceive seismic hazard to be higher than respondents in the CRD, while the calculated hazard is actually higher in the CRD. In addition, emergency managers underestimate residents' perceptions of earthquake hazard. In other words, they feel that the public underestimates the hazard when actually both emergency managers and the general public overestimate it. These misperceptions have implications for future seismic hazard and disaster risk communication. Prior to this study, disaster risk perception has not been explored in detail in this region, and while limitations to this research are outlined, the study provides a useful descriptive analysis and baseline information for emergency managers and academic researchers to build upon. The findings of this research have specific relevance for emergency managers to inform their public education and outreach efforts around preparation, response and resilience to disasters on southern Vancouver Island.
Author:
Publisher:
ISBN:
Category : Earthquakes
Languages : en
Pages : 28
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 2
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Book Description
"Southwestern British Columbia is one of the most seismically active regions in Canada. Approximately 400 earthquakes occur each year in the region extending from the north end of Vancouver Island to Seattle, Washington U.S. seen on the map below. About a dozen of these earthquakes are felt by people, but many of the larger earthquakes occur offshore. Earthquakes capable of causing structural damage happen every decade or so"--Page [1].
Author: B.E. Tucker
Publisher: Springer Science & Business Media
ISBN: 9401583382
Category : Science
Languages : en
Pages : 338
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Book Description
Urban seismic risk is growing worldwide and is, increasingly, a problem of developing countries. In 1950, one in four of the people living in the world's fifty largest cities was earthquake-threatened, while in the year 2000, about one in two will be. Further, ofthose people living in earthquake-threatened cities in 1950, about two in three were located in developing countries, while in the year 2000, about nine in ten will be. Unless urban seismic safety is improved, particularly in developing countries, future earthquakes will have ever more disastrous social and economic consequences. In July 1992, an international meeting was organized with the purpose of examining one means ofimproving worldwide urban safety. Entitled "Uses ofEarthquake Damage Scenarios for Cities of the 21st Century," this meeting was held in conjunction with the Tenth World Conference ofEarthquake Engineering, in Madrid, Spain. An earthquake damage scenario (EDS) is adescription of the consequences to an urban area of a large, but expectable earthquake on the critical facilities of that area. In Californian and Japanese cities, EDSes have been used for several decades, mainly for the needs of emergency response officials. The Madrid meeting examined uses of this technique for other purposes and in other, less developed countries. As a result of this meeting, it appeared that EDSes bad significant potential to improve urban seismic safety worldwide.
Author: Michael A. Fisher
Publisher:
ISBN:
Category : Earthquakes
Languages : en
Pages : 28
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Book Description
Author: Tracy Monk
Publisher:
ISBN:
Category : Earthquakes
Languages : en
Pages : 15
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Book Description
