Generating a seismogenic source zone model for the Pyrenees: A GIS-assisted triclustering approach

2021 ◽  
Vol 150 ◽  
pp. 104736
Author(s):  
José L. Amaro-Mellado ◽  
Laura Melgar-García ◽  
Cristina Rubio-Escudero ◽  
David Gutiérrez-Avilés
Keyword(s):  
Source Zone ◽  
Zone Model ◽  
Seismogenic Source

scholarly journals A seismic source zone model for the seismic hazard assessment of Slovakia

2016 ◽  
Vol 67 (3) ◽  
pp. 275-290 ◽  
Author(s):  
Jozef Hók ◽  
Robert Kysel ◽  
Michal Kováč ◽  
Peter Moczo ◽  
Jozef Kristek ◽  
...  
Keyword(s):  
Seismic Hazard ◽  
Hazard Assessment ◽  
Large Scale ◽  
Seismic Hazard Assessment ◽  
Seismic Source ◽  
Source Zone ◽  
Zone Model ◽  
Geological Structures ◽  
Seismotectonic Model ◽  
Seismogenic Structures

Abstract We present a new seismic source zone model for the seismic hazard assessment of Slovakia based on a new seismotectonic model of the territory of Slovakia and adjacent areas. The seismotectonic model has been developed using a new Slovak earthquake catalogue (SLOVEC 2011), successive division of the large-scale geological structures into tectonic regions, seismogeological domains and seismogenic structures. The main criteria for definitions of regions, domains and structures are the age of the last tectonic consolidation of geological structures, thickness of lithosphere, thickness of crust, geothermal conditions, current tectonic regime and seismic activity. The seismic source zones are presented on a 1:1,000,000 scale map.

A seismic source zone model for the seismic hazard assessment of the Italian territory

2008 ◽  
Vol 450 (1-4) ◽  
pp. 85-108 ◽  
Author(s):  
Carlo Meletti ◽  
Fabrizio Galadini ◽  
Gianluca Valensise ◽  
Massimiliano Stucchi ◽  
Roberto Basili ◽  
...  
Keyword(s):  
Seismic Hazard ◽  
Hazard Assessment ◽  
Seismic Hazard Assessment ◽  
Seismic Source ◽  
Source Zone ◽  
Zone Model ◽  
Italian Territory

Uncertainty Propagation and Stochastic Interpretation of Shear Motion Generation due to Underground Chemical Explosions in Jointed Rock

2020 ◽  
Author(s):  
Souheil Ezzedine ◽  
Oleg Vorobiev ◽  
Tarabay Antoun ◽  
William Walter
Keyword(s):  
Wave Propagation ◽  
Near Field ◽  
Uncertainty Propagation ◽  
Source Zone ◽  
Underground Explosion ◽  
Zone Model ◽  
Far Field ◽  
Motion Generation ◽  
Chemical Explosions ◽  
Shear Motion

<p>We have performed 3D simulations of underground chemical explosions conducted recently in granitic outcrop as part of the Source Physics Experiment (SPE) campaign. The main goal of these simulations is to understand the nature of the shear motions recorded in the near field considering uncertainties in a) the geological characterization of the joints, such as density, orientation and persistency and b) the geomechanical material properties, such as, friction angle, bulk sonic speed, poroelasticity etc. The approach is probabilistic; joints are depicted using a Boolean stochastic representation of inclusions conditional to observations and their probability density functions inferred from borehole data. Then, using a novel continuum approach, joints and faults are painted into the continuum host material, granite. To ensure the fidelity of the painted joints we have conducted a sensitivity study of continuum vs. discrete representation of joints. Simulating wave propagation in heterogeneous discontinuous rock mass is a highly non-linear problem and uncertainty propagation via intrusive methods is practically forbidden. Therefore, using a series of nested Monte Carlo simulations, we have explored and propagated both the geological and the geomechanical uncertainty parameters. We have probabilistically shown that significant shear motions can be generated by sliding on the joints caused by spherical wave propagation. Polarity of the shear motion may change during unloading when the stress state may favor joint sliding on a different joint set. Although this study focuses on understanding shear wave generation in the near field, the overall goal of our investigation is to understand the far field seismic signatures associated with shear waves generated in the immediate vicinity of an underground explosion. Therefore, we have abstracted the near field behavior into a probabilistic source-zone model which is used in the far field wave propagation.</p><p>This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344</p>

Earthquake Hazard in the Eastern United States: Consequences of Alternative Seismic Source Zones

1987 ◽  
Vol 3 (2) ◽  
pp. 227-261 ◽  
Author(s):  
P. C. Thenhaus ◽  
D. M. Perkins ◽  
S. T. Algermissen ◽  
S. L. Hanson
Keyword(s):  
United States ◽  
South Carolina ◽  
Ground Motion ◽  
Seismic Source ◽  
Source Zone ◽  
Zone Model ◽  
Maximum Magnitude ◽  
Eastern United States ◽  
Thrust Tectonics ◽  
Source Zones

The regional variability in expected ground motion associated with six different characterizations of seismic source zones for probabilistic ground motion assessment is examined for the eastern United States. Three of the seismic source zone models are based on types of geologic structure: (1) regions characterized by late-Precambrian faulting; (2) middle-to-late Paleozoic thrust tectonics; and (3) early-to-middle Mesozoic extensional features. Two other seismic source zone configurations considered are based on data related to vertical crustal movements, and the final source zone model investigated is that of Algermissen and others (1982). Maintaining the same maximum magnitude among all zones and for all source zone configurations, a comparison of results indicates a factor of 3 difference among source zone models for calculated acceleration levels in eastern Massachusetts, southeastern Maine, and the Cape Fear arch of eastern North Carolina; a factor of about 2 or greater difference for most other eastern seaboard areas; and a factor of 1.5 or less for much of the Appalachian region extending from New Brunswick to the Gulf Coast. Results show that certain source zone models based exclusively on speculative geologic hypotheses result in considerably lower ground-motion hazard than otherwise implied by accepting historical seismicity as a guide to future hazard. Significantly, variation in the seismic hazard estimates at probability levels of 1 in 500 due to uncertain earthquake causal structures or processes is considerably higher in the heavily populated northeast region than in the Charleston, South Carolina, area.

A Quasi-3D Surf Zone Model

1995 ◽  
Author(s):  
Jung Lyul Lee ◽  
Hsiang Wang
Keyword(s):  
Surf Zone ◽  
Zone Model

150. Estimating Emission Factors in a Capacitor Factory Using a Modified Two-Zone Model

2006 ◽  
Author(s):  
C. Feigley ◽  
N. Schnaufer ◽  
T. Do ◽  
E. Lee ◽  
M. Venkatraman ◽  
...  
Keyword(s):  
Emission Factors ◽  
Zone Model

Use of endoscopic transorbital and endonasal approaches for 360° circumferential access to orbital tumors

2020 ◽  
pp. 1-10
Author(s):  
Chiman Jeon ◽  
Sang Duk Hong ◽  
Kyung In Woo ◽  
Ho Jun Seol ◽  
Do-Hyun Nam ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Minimally Invasive ◽  
Surgical Techniques ◽  
Cystic Teratoma ◽  
Subtotal Resection ◽  
Zone Model ◽  
Team Approach ◽  
Orbital Tumors ◽  
Total Resection ◽  
Endoscopic Transorbital

OBJECTIVEOrbital tumors are often surgically challenging because they require an extensive fronto-temporo-orbital zygomatic approach (FTOZ) and a multidisciplinary team approach to provide the best outcomes. Recently, minimally invasive endoscopic techniques via a transorbital superior eyelid approach (ETOA) or endoscopic endonasal approach (EEA) have been proposed as viable alternatives to transcranial approaches for orbital tumors. In this study, the authors investigated the feasibility of 360° circumferential access to orbital tumors via both ETOA and EEA.METHODSBetween April 2014 and June 2019, 16 patients with orbital tumors underwent either ETOA or EEA at the authors’ institution. Based on the neuro-topographic “four-zone model” of the orbit with its tumor epicenter around the optic nerve in the coronal plane, ETOA (n = 10, 62.5%) was performed for tumors located predominantly superolateral to the nerve and EEA (n = 6, 37.5%) for those located predominantly inferomedial to the nerve. Eight patients (50%) presented with intraconal tumors and 8 (50%) with extraconal ones. The orbital tumors included orbital schwannoma (n = 6), cavernous hemangioma (n = 2), olfactory groove meningioma (n = 1), sphenoorbital meningioma (n = 1), chondrosarcoma (n = 1), trigeminal schwannoma (n = 1), metastatic osteosarcoma (n = 1), mature cystic teratoma (n = 1), sebaceous carcinoma (n = 1), and ethmoid sinus osteoma (n = 1). The clinical outcomes and details of surgical techniques were reviewed.RESULTSGross-total resection was achieved in 12 patients (75%), near-total resection in 3 (18.8%), and subtotal resection in 1 (6.2%). Eight (88.9%) of the 9 patients with preoperative proptosis showed improvement after surgery, and 4 (66.7%) of the 6 patients with visual symptoms demonstrated improvement. Four (40%) of the 10 patients treated with ETOA experienced partial third nerve palsy immediately after surgery (3 transient and 1 persistent). There have been no postoperative CSF leaks or infections in this series.CONCLUSIONSWithout transcranial approaches requiring temporalis muscle dissection and orbitozygomatic osteotomy, the selection of ETOA or EEA based on a concept of a four-zone model with its epicenter around the optic nerve successfully provides a minimally invasive 360° circumferential access to the entire orbit with acceptable morbidity.

Sign in / Sign up

Export Citation Format

Share Document