scholarly journals Ground motion scenarios for the 1997 Colfiorito, central Italy, earthquake

2009 ◽  
Vol 51 (2-3) ◽  
Author(s):  
A. Emolo ◽  
G. Cultrera ◽  
G. Franceschina ◽  
F. Pacor ◽  
V. Convertito ◽  
...  
Keyword(s):  
Ground Motion ◽  
Central Italy ◽  
Central Italy Earthquake ◽  
Ground Motion Scenarios

scholarly journals Spatial correlation of broadband earthquake ground motion in Norcia (Central Italy) from physics-based simulations

2021 ◽  
Author(s):  
Erika Schiappapietra ◽  
Chiara Smerzini
Keyword(s):  
Spatial Correlation ◽  
Ground Motion ◽  
Near Field ◽  
Geometric Mean ◽  
Central Italy ◽  
Earthquake Ground Motion ◽  
Physical Parameters ◽  
Spatial Correlations ◽  
Ground Motion Scenarios ◽  
The Impact

AbstractThis paper investigates the spatial correlation of response spectral accelerations from a set of broadband physics-based ground motion simulations generated for the Norcia (Central Italy) area by means of the SPEED software. We produce several ground-motion scenarios by varying either the slip distribution or the hypocentral location as well as the magnitude to systematically explore the impact of such physical parameters on spatial correlations. We extend our analysis to other ground-motion components (vertical, fault-parallel, fault-normal) in addition to the more classic geometric mean to highlight possible ground-motion directionality and therefore identify specific spatial correlation features. Our analyses provide useful insights on the role of slip heterogeneities as well as the relative position between hypocentre and slip asperities on the spatial correlation. Indeed, we found a significant variability in terms of both range and sill among the considered case studies, suggesting that the spatial correlation is not only period-dependent, but also scenario-dependent. Finally, our results reveal that the isotropy assumption may represent an oversimplification especially in the near-field and thus it may be unsuitable for assessing the seismic risk of spatially-distributed infrastructures and portfolios of buildings.

scholarly journals Preliminary engineering analysis of the August 24th 2016, ML 6.0 central Italy earthquake records

2016 ◽  
Vol 59 ◽  
Author(s):  
Iunio Iervolino ◽  
Georgios Baltzopoulos ◽  
Eugenio Chioccarelli
Keyword(s):  
Ground Motion ◽  
Central Italy ◽  
Strong Motion ◽  
Response Spectra ◽  
Rupture Propagation ◽  
Return Periods ◽  
Central Italy Earthquake ◽  
Hazard Disaggregation ◽  
Directivity Effects ◽  
The Impact

An earthquake of estimated local magnitude (ML) 6.0 struck central Italy on the 24th of August (01:36:32 UTC) in the vicinity of Accumoli (close to Rieti, central Italy) initiating a long-lasting seismic sequence that also featured events of larger magnitude within a few months. The earthquake caused widespread building damage and around three-hundred fatalities. Ground motion was recorded by hundreds of seis-mic stations. This work uses accelerometric records for a preliminary discussion, from the earthquake en-gineering perspective, of strong motion caused by the earthquake. Peak and integral ground motion inten-sity measures, are presented. The response spectra at some select stations are analysed with respect to the code-mandated design actions for various return periods at the recording sites. Hazard disaggregation for different return periods is discussed referring to the site of the epicentre of the earthquake. Finally, some preliminary considerations are made concerning the impact of rupture propagation on near-source ground motion; i.e., the records are scanned for traces of pulse-like forward-directivity effects.

scholarly journals Estimation of the ground shaking from the response of rigid bodies

2016 ◽  
Vol 59 ◽  
Author(s):  
Filomena de Silva ◽  
Stefania Sica ◽  
Francesco Silvestri ◽  
Stefano Aversa
Keyword(s):  
Ground Motion ◽  
Main Shock ◽  
Central Italy ◽  
Rigid Bodies ◽  
Specific Site ◽  
Ground Shaking ◽  
Central Italy Earthquake ◽  
Final Goal

<p>The paper illustrates and compares simplified approaches to interpret the mechanisms of damage observed on rigid bodies in the cemetery of Amatrice, after the main shock (August 24, 2016, M<sub>W</sub>=6.0) of the Central Italy earthquake. The final goal of the work is to link the observed movements of the fallen objects to specific characteristics of the ground motion occurred at the specific site.</p>

scholarly journals From scenario-based seismic hazard to scenario-based landslide hazard: fast-forwarding to the future via statistical simulations

2021 ◽  
Author(s):  
Luigi Lombardo ◽  
Hakan Tanyas
Keyword(s):  
Ground Motion ◽  
Landslide Susceptibility ◽  
Additive Model ◽  
Landslide Hazard ◽  
Northridge Earthquake ◽  
Ground Acceleration ◽  
Temporal Dimension ◽  
Earthquake Scenario ◽  
The Mean ◽  
Ground Motion Scenarios

AbstractGround motion scenarios exists for most of the seismically active areas around the globe. They essentially correspond to shaking level maps at given earthquake return times which are used as reference for the likely areas under threat from future ground displacements. Being landslides in seismically actively regions closely controlled by the ground motion, one would expect that landslide susceptibility maps should change as the ground motion patterns change in space and time. However, so far, statistically-based landslide susceptibility assessments have primarily been used as time-invariant.In other words, the vast majority of the statistical models does not include the temporal effect of the main trigger in future landslide scenarios. In this work, we present an approach aimed at filling this gap, bridging current practices in the seismological community to those in the geomorphological and statistical ones. More specifically, we select an earthquake-induced landslide inventory corresponding to the 1994 Northridge earthquake and build a Bayesian Generalized Additive Model of the binomial family, featuring common morphometric and thematic covariates as well as the Peak Ground Acceleration generated by the Northridge earthquake. Once each model component has been estimated, we have run 1000 simulations for each of the 217 possible ground motion scenarios for the study area. From each batch of 1000 simulations, we have estimated the mean and 95% Credible Interval to represent the mean susceptibility pattern under a specific earthquake scenario, together with its uncertainty level. Because each earthquake scenario has a specific return time, our simulations allow to incorporate the temporal dimension into any susceptibility model, therefore driving the results toward the definition of landslide hazard. Ultimately, we also share our results in vector format – a .mif file that can be easily converted into a common shapefile –. There, we report the mean (and uncertainty) susceptibility of each 1000 simulation batch for each of the 217 scenarios.

Sign in / Sign up

Export Citation Format

Share Document