Normal Faulting in the 1923 Berdún Earthquake and Postorogenic Extension in the Pyrenees

Stich, Daniel; Martín, Ricardo Muñoz; Batlló, Josep; Macià, Ramón; Mancilla, Flor de Lis; Morales, J.

doi:10.1002/2018gl077502

Cited by 11 publications

(2 citation statements)

References 46 publications

(101 reference statements)

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“…Their intensities recorded in the catalog could not be the epicentral ones, due to attenuation, and should be revised. The works that have supported the review are found in [6,39,46,47,49,50,52,55,[61][62][63][64][65][66][67].…”

Section: Review From Other Catalogs and Specific Studiesmentioning

confidence: 99%

GIS-Based Mapping of Seismic Parameters for the Pyrenees

Amaro-Mellado

Bui

2020

IJGI

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In the present paper, three of the main seismic parameters, maximum magnitude -Mmax, b-value, and annual rate -AR, have been studied for the Pyrenees range in southwest Europe by a Geographic Information System (GIS). The main aim of this work is to calculate, represent continuously, and analyze some of the most crucial seismic indicators for this belt. To this end, an updated and homogenized Poissonian earthquake catalog has been generated, where the National Geographic Institute of Spain earthquake catalog has been considered as a starting point. Herein, the details about the catalog compilation, the magnitude homogenization, the declustering of the catalog, and the analysis of the completeness, are exposed. When the catalog has been produced, a GIS tool has been used to drive the parameters’ calculations and representations properly. Different grids (0.5 × 0.5° and 1 × 1°) have been created to depict a continuous map of these parameters. The b-value and AR have been obtained that take into account different pairs of magnitude–year of completeness. Mmax has been discretely obtained (by cells). The analysis of the results shows that the Central Pyrenees (mainly from Arudy to Bagnères de Bigorre) present the most pronounced seismicity in the range.

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Section: Review From Other Catalogs and Specific Studiesmentioning

confidence: 99%

GIS-Based Mapping of Seismic Parameters for the Pyrenees

Amaro-Mellado

Bui

2020

IJGI

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“…The largest earthquake in the region is the Martes (or Berdún) event of July 10, 1923 (Martínez-Solares andMezcua, 2002), which is also the largest earthquake recorded instrumentally in the Pyrenees (Stich et al, 2018) (see epicentral location in Fig. 3).…”

Section: Seismotectonicsmentioning

confidence: 99%

Evaluating Quaternary activity versus inactivity on faults and folds using geomorphological mapping and trenching: Seismic hazard implications

et al. 2019

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The incorporation of active faults in seismic hazard analyses may have a significant impact on the feasibility, design and cost of major engineering projects (e.g., nuclear facilities, dams), especially when located in the site vicinity. The regulatory definition of active versus inactive fault is generally based on whether the fault has ruptured or not after a specific chronological bound (i.e. fault recency). This work presents a methodology, mainly based on geomorphological mapping and trenching, for determining whether specific faults can be considered as active or inactive. The approach is illustrated through the analysis of several faults located in the Spanish Pyrenees (Loiti, Leyre, La Trinidad, Ruesta faults). The 29 km long Loiti Thrust was included in the Neotectonic Map of Spain as a probable neotectonic structure. Previous works, based on geomorphological investigations, incorporated the 28 km long Leyre Thrust as a significant seismic source in a probabilistic seismic hazard analysis, which challenged the seismic design of nearby large dams. The production of

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Earthquake hazard and risk analysis for natural and induced seismicity: towards objective assessments in the face of uncertainty

Bommer

2022

Bull Earthquake Eng

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The fundamental objective of earthquake engineering is to protect lives and livelihoods through the reduction of seismic risk. Directly or indirectly, this generally requires quantification of the risk, for which quantification of the seismic hazard is required as a basic input. Over the last several decades, the practice of seismic hazard analysis has evolved enormously, firstly with the introduction of a rational framework for handling the apparent randomness in earthquake processes, which also enabled risk assessments to consider both the severity and likelihood of earthquake effects. The next major evolutionary step was the identification of epistemic uncertainties related to incomplete knowledge, and the formulation of frameworks for both their quantification and their incorporation into hazard assessments. Despite these advances in the practice of seismic hazard analysis, it is not uncommon for the acceptance of seismic hazard estimates to be hindered by invalid comparisons, resistance to new information that challenges prevailing views, and attachment to previous estimates of the hazard. The challenge of achieving impartial acceptance of seismic hazard and risk estimates becomes even more acute in the case of earthquakes attributed to human activities. A more rational evaluation of seismic hazard and risk due to induced earthquakes may be facilitated by adopting, with appropriate adaptations, the advances in risk quantification and risk mitigation developed for natural seismicity. While such practices may provide an impartial starting point for decision making regarding risk mitigation measures, the most promising avenue to achieve broad societal acceptance of the risks associated with induced earthquakes is through effective regulation, which needs to be transparent, independent, and informed by risk considerations based on both sound seismological science and reliable earthquake engineering.

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Normal Faulting in the 1923 Berdún Earthquake and Postorogenic Extension in the Pyrenees

Cited by 11 publications

References 46 publications

GIS-Based Mapping of Seismic Parameters for the Pyrenees

GIS-Based Mapping of Seismic Parameters for the Pyrenees

Evaluating Quaternary activity versus inactivity on faults and folds using geomorphological mapping and trenching: Seismic hazard implications

Earthquake hazard and risk analysis for natural and induced seismicity: towards objective assessments in the face of uncertainty

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