CHIMP - A SHAKING DATASET TO ASSESS THE PERFORMANCE OF EARTHQUAKE HAZARD MAPS FOR CALIFORNIA

2019 ◽  
Author(s):  
Molly M. Gallahue ◽  
◽  
Leah Salditch ◽  
Susan Hough ◽  
Seth Stein ◽  
...  
2015 ◽  
Vol 87 (1) ◽  
pp. 90-102 ◽  
Author(s):  
Edward M. Brooks ◽  
Seth Stein ◽  
Bruce D. Spencer

1997 ◽  
Vol 13 (4) ◽  
pp. 721-737 ◽  
Author(s):  
Robert B. Olshansky

Local-scale seismic hazard maps are an important component of loss estimation because they provide information on possible site effects. This paper evaluates how well seismic hazard maps predicted damage in the Northridge earthquake. Normalizing for residential density, the research found that structures built on several geologic map units shown on pre-1994 hazard maps had significantly more damage than the area-wide average. Specifically, buildings on fine-grained Holocene alluvium, hillside bedrock, and “moderate” and “very high” liquefaction susceptibility zones were 1.5 to 2.5 times more likely to be damaged than the area average. Pipes were four times more likely to break in “very high” liquefaction susceptibility zones than in the area as a whole. The use of hazard maps in loss estimation can help state and local governments to set priorities in managing land use, enforcing building codes, conducting seismic strengthening programs for existing structures, and planning for emergency response and longterm recovery.


2018 ◽  
Vol 175 (8) ◽  
pp. 2693-2720 ◽  
Author(s):  
Hanan Gaber ◽  
Mahmoud El-Hadidy ◽  
Ahmed Badawy

Author(s):  
Enrico Brandmayr ◽  
Vaccari Franco ◽  
Romanelli Fabio ◽  
Vlahovic Gordana ◽  
Panza Giuliano Francesco

Kosovo is one of the most seismically active regions in Europe, lying within the Alpine-Mediterranean tectonic belt. Historical records for the region show several catastrophic earthquakes with epicentral intensity IX (MCS). However, due to Kosovo’s high population density, high prevalence of traditional construction, and insufficient enforcement of building codes, Kosovo is vulnerable to earthquake damage. In this study, we present earthquake hazard maps for bedrock conditions in Kosovo based on the well-known Neo-deterministic Seismic Hazard Assessment (NDSHA) method. NDSHA relies upon the fundamental physics of wave generation and propagation in complex geologic structures to generate realistic time series, used as input for the computation of several ground motion parameters, integrating the available knowledge of seismic history, seismogenic zones and morphostructural nodes. In accordance with continuum mechanics, the tensor nature of earthquake ground motion is preserved, producing realistic signals using structural models obtained by tomographic inversion and earthquake source information readily available in literature. Our maps are generally consistent with the observed intensity IX (MCS) and suggest that, in some instances, intensity X could be reached.


2007 ◽  
Vol 7 (5) ◽  
pp. 607-614 ◽  
Author(s):  
A. Orhan ◽  
E. Seyrek ◽  
H. Tosun

Abstract. The city of Eskişehir in inner-western Turkey has experienced a destructive earthquake with Ms=6.4 in 1956 in addition to many events with magnitudes greater than 5. It is located in a wide basin having young sedimentary units and thick alluvium soils which also include liquefiable sand materials. There is also an active fault passing beneath the city center and the groundwater level is very close to the ground surface. Approximately 600 thousand people are living in the province of Eskişehir. Therefore, the city and its vicinity have a high risk, when earthquake hazard is considered. This paper summarizes the probabilistic seismic hazard analysis (PSHA) which was performed for the province of Eskişehir and introduces seismic hazard maps produced by considering earthquakes with magnitude Ms≥4.0 occurred during the last 100-years and a seismic model composed of four seismic sources. The results of PSHA show that the average peak ground acceleration (PGA) for the city center is 0.40 g for 10 percent probability of exceedance in 50 years, for rock site. The seismic hazard maps were obtained by means of a program of Geographic Information System.


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