scholarly journals Historical seismic catalogue updates and site effects considerations for southern Piedmont (Northwest Italy)

2021 ◽  
Vol 55 ◽  
pp. 1-8
Author(s):  
Mauro Bonasera ◽  
Matteo Redana ◽  
Giandomenico Fubelli
Keyword(s):  
Site Effects ◽  
Seismic Catalogue

Site effects of the Denis-Perron dam (SM-3): A case study in Eastern North America

2021 ◽  
pp. 875529302110194
Author(s):  
Daniel Verret ◽  
Denis LeBœuf ◽  
Éric Péloquin
Keyword(s):  
North America ◽  
Ground Motion ◽  
Site Effects ◽  
Transfer Functions ◽  
Ground Motions ◽  
Published Data ◽  
Eastern North America ◽  
Ground Acceleration ◽  
Large Dams ◽  
Moderate Seismicity

Eastern North America (ENA) is part of a region with low-to-moderate seismicity; nonetheless, some significant seismic events have occurred in the last few decades. Recent events have reemphasized the need to review ENA seismicity and ground motion models, along with continually reevaluating and updating procedures related to the seismic safety assessment of hydroelectric infrastructures, particularly large dams in Québec. Furthermore, recent researchers have shown that site-specific characteristics, topography, and valley shapes may significantly aggravate the severity of ground motions. To the best of our knowledge, very few instrumental data from actual earthquakes have been published for examining the site effects of hydroelectric dam structures located in eastern Canada. This article presents an analysis of three small earthquakes that occurred in 1999 and 2002 at the Denis-Perron (SM-3) dam. This dam, the highest in Québec, is a rockfill embankment structure with a height of 171 m and a length of 378 m; it is located in a narrow valley. The ground motion datasets of these earthquakes include the bedrock and dam crest three-component accelerometer recordings. Ground motions are analyzed both in the time and frequency domains. The spectral ratios and transfer functions obtained from these small earthquakes provide new insights into the directionality of resonant frequencies, vibration modes, and site effects for the Denis-Perron dam. The crest amplifications observed for this dam are also compared with previously published data for large dams. New statistical relationships are proposed to establish dam crest amplification on the basis of the peak ground acceleration (PGA) at the foundation.

In vitro comparison of harvesting site effects on cardiac extracellular matrix hydrogels

2021 ◽  
Author(s):  
Emily Mulvany ◽  
Sara McMahan ◽  
Jiazhu Xu ◽  
Narges Yazdani ◽  
Rebecca Willits ◽  
...  
Keyword(s):  
Extracellular Matrix ◽  
Site Effects ◽  
In Vitro Comparison

scholarly journals Integrating climate, soil and stand structure into allometric models: An approach of site-effects on tree allometry in Atlantic Forest

2021 ◽  
Vol 127 ◽  
pp. 107794
Author(s):  
Vinicius Costa Cysneiros ◽  
Fernanda Coelho de Souza ◽  
Tatiana Dias Gaui ◽  
Allan Libanio Pelissari ◽  
Gabriel Agostini Orso ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Site Effects ◽  
Stand Structure ◽  
Tree Allometry ◽  
Allometric Models

scholarly journals Statistics of seismicity to investigate the Campi Flegrei caldera unrest

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
A. Tramelli ◽  
C. Godano ◽  
P. Ricciolino ◽  
F. Giudicepietro ◽  
S. Caliro ◽  
...  
Keyword(s):  
Ground Deformation ◽  
Central Area ◽  
Seismic Energy ◽  
Progressive Increase ◽  
Campi Flegrei ◽  
Cumulative Number ◽  
Seismic Parameters ◽  
Seismicity Rate ◽  
Seismic Catalogue ◽  
Vertical Ground

AbstractThe knowledge of the dynamic of the Campi Flegrei calderic system is a primary goal to mitigate the volcanic risk in one of the most densely populated volcanic areas in the world. From 1950 to 1990 Campi Flegrei suffered three bradyseismic crises with a total uplift of 4.3 m. After 20 years of subsidence, the uplift started again in 2005 accompained by a low increment of the seismicity rate. In 2012 an increment in the seismic energy release and a variation in the gas composition of the fumaroles of Solfatara (in the central area of the caldera) were recorded. Since then, a slow and progressive increase in phenomena continued until today. We analyze the INGV - Osservatorio Vesuviano seismic catalogue of Campi Flegrei from 2000 to 2020 in order to look for any variation in the seismic parameters and compare them with geochemical monitored ones. A remarkable correlation between independent variables of earthquake cumulative number, CO/CO2 values and vertical ground deformation reveals a likely common origin. Moreover the correlation between all the variables here analysed enlightens that the same origin can cause the temporal behavior of all these variables. We interpret the seismological, geochemical and geodetic observable in terms of the injection of magmatic fluids into the hydrothermal system or its pressurization.

Meteorological conditions influence on quantification of site effects at low frequency using the seismic ambient noise

2015 ◽  
Author(s):  
Rabah Bensalem* ◽  
Djamal Machane ◽  
Jean-Luc Chatelain ◽  
Mohamed Djeddi ◽  
Hakim Moulouel ◽  
...  
Keyword(s):  
Site Effects ◽  
Ambient Noise ◽  
Low Frequency ◽  
Meteorological Conditions ◽  
Seismic Ambient Noise

Parametric analysis of the seismic response of a 2D sedimentary valley: implications for code implementations of complex site effects

2005 ◽  
Vol 25 (4) ◽  
pp. 303-315 ◽  
Author(s):  
Konstantia Makra ◽  
Francisco J. Chávez-García ◽  
Dimitrios Raptakis ◽  
Kyriazis Pitilakis
Keyword(s):  
Seismic Response ◽  
Parametric Analysis ◽  
Site Effects
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