Liquefaction Susceptibility and Hazard Mapping: Insights From Case Histories of Earthquake-Induced Liquefaction

Bucci, Monica Giona; Tuttle, Martitia P.

doi:10.1016/b978-0-12-818234-5.00054-7

Cited by 2 publications

(1 citation statement)

References 94 publications

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“…According to the Incorporated Research Institutions for Seismology (IRIS) database, the repetitive occurrence of seismic events, such as volcanism and earthquakes, in northwestern Venezuela and Trinidad and Tobago was recorded as a series of events over the last 25 years. The ongoing effects of earthquakes in Venezuela [45][46][47][48][49][50] and coastal regions of Trinidad and Tobago [51,52] have made geophysical mapping an important task for seismic hazard mapping, earthquake prognosis, and risk assessment [53].…”

Section: Study Areamentioning

confidence: 99%

Seismotectonics of Shallow-Focus Earthquakes in Venezuela with Links to Gravity Anomalies and Geologic Heterogeneity Mapped by a GMT Scripting Language

Lemenkova

Debeir

2022

Sustainability

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This paper presents a cartographic framework based on algorithms of GMT codes for mapping seismically active areas in Venezuela. The data included raster grids from GEBCO, EGM-2008, and vector geological layers from the USGS. The data were iteratively processed in the console of GMT, converted by GDAL, formatted, and mapped for geophysical data visualisation; the QGIS was applied for geological mapping. We analyzed 2000 samples of the earthquake events obtained from the IRIS seismic database with a 25-year time span (1997–2021) in order to map the seismicity. The approach to linking geological, topographic, and geophysical data using GMT scripts aimed to map correlations among the geophysical phenomena, tectonic processes, geological setting, seismicity, and earthquakes. The practical application of the GMT scripts consists in automated mapping for the visualization of geological risks and hazards in the mountainous region of the Venezuelan Andes. The proposed method integrates the approach of GMT scripts with state-of-the-art GIS techniques, which demonstrated its effectiveness as a tool for mapping spatial datasets and rapid data processing in an iterative regime. In this context, using GMT and GIS to find similarities between the regional earthquake distribution and the geological and topographic setting is essential for hazard risk assessment. This study can serve as a basis for predictive seismic analysis in geologically vulnerable regions of Venezuela. In addition to a technical demonstration of GMT algorithms, this study also contributes to geological and geophysical mapping and seismic hazard assessments in South America. We present the full scripts used for mapping in a GitHub repository.

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Section: Study Areamentioning

confidence: 99%

Seismotectonics of Shallow-Focus Earthquakes in Venezuela with Links to Gravity Anomalies and Geologic Heterogeneity Mapped by a GMT Scripting Language

Lemenkova

Debeir

2022

Sustainability

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Susceptibility of typical marine geological disasters: an overview

Wang

Zhang

Guo

2023

Geoenviron Disasters

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Background Marine geological disasters (i.e., catastrophic events occurring in marine environments) may seriously threaten the safety of engineering facilities, life, and property in shallow- and deep-sea areas. The development of marine resources and energy and the protection of the marine geo-environment are topics of intense interest globally, and these activities inevitably require the assessment of marine geological disasters, which are receiving increasing attention from academic and industrial communities. However, as a prospective analysis for the risk assessment and management of marine geological disasters, the susceptibility of marine geological disasters, referring to a qualitative or quantitative description of the type, volume (or area), and spatial distribution of existing or potential geological disasters, is still in the exploration stage. Results In this study, we systematically combine the theoretical basis and methods for the analysis of the susceptibility of marine geological disasters (i.e., heuristic approach, deterministic approach, and statistical approach). Taking two widely studied marine geological disasters (i.e., seabed liquefaction and submarine landslides) as examples, we review their triggering mechanism, condition factors, methodological advances, and susceptibility maps. Subsequently, some challenges in the susceptibility assessment of the marine geological disasters associated with seabed liquefaction and submarine landslides and extension to other types of marine geological disasters are briefly summarized and discussed, involving an incomplete evaluation system, poor applicability of methods, and insufficient databases. Conclusion Based on a literature review using the extensive literature database, we focused on the susceptibility of two typical marine geological disasters (i.e., seabed liquefaction and submarine landslides) and systematically summarized the development history, methods, results, problems, and future directions. According to the challenges of this field, we recommend that relevant organizations focus on the construction of a susceptibility system and study the triggering mechanisms of marine geological disasters. Long-term in situ observation efforts should also be supported to obtain more data to improve the disaster inventory. Ultimately, more reliable methods can help improve the credibility and usefulness of susceptibility analysis results.

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Liquefaction Susceptibility and Hazard Mapping: Insights From Case Histories of Earthquake-Induced Liquefaction

Cited by 2 publications

References 94 publications

Seismotectonics of Shallow-Focus Earthquakes in Venezuela with Links to Gravity Anomalies and Geologic Heterogeneity Mapped by a GMT Scripting Language

Seismotectonics of Shallow-Focus Earthquakes in Venezuela with Links to Gravity Anomalies and Geologic Heterogeneity Mapped by a GMT Scripting Language

Susceptibility of typical marine geological disasters: an overview

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