Abstract

Active faults are those faults on which movement is possible in the future. It draws particular attention to active faults in geodynamic studies and seismic hazard assessment. Here we present a high-detail continental-scale geodatabase: The Active Faults of Eurasia Database (AFEAD). It comprises 46,775 objects stored in the shapefile format with spatial detail sufficient for a map of scale 1:1M. Fault sense, a rank of confidence in activity, a rank of slip rate, and a reference to source publications are provided for each database entry. Where possible, it is supplemented with a fault name, fault zone name, abbreviated fault parameters (e.g., slip rate, age of the last motion, total offset), and text information from the sources. The database was collected from 612 sources, including regional maps, databases, and research papers. AFEAD facilitates a spatial search for local studies. It provides sufficient detail for planning a study of a particular fault system and guides deeper bibliographical investigations if needed. This scenario is particularly significant for vast Central and North Asia areas, where most studies are available only in Russian and hardcopy. Moreover, the database model provides the basis for GIS-based regional and continental-scale integrative studies. The database is available at https://doi.org/10.13140/RG.2.2.10333.74726 and via web map at http://neotec.ginras.ru/index/mapbox/database_map.html (last access: July 30, 2021). Some database representations with supplementary data are hosted at http://neotec.ginras.ru/index/english/database_eng.html.

Highlights

  • The concept of an active fault emerged to distinguish a specific group of faults with present tectonic movements and with anticipated activity in the nearest future

  • The Project II-2 joined more than 70 scientists from 50 countries lead by two co-chairmen representatives for the Eastern

  • These source data were represented in different scales and formats, so the first database (DB96) of active faults of Eurasia (Ioffe et al, 1993; Ioffe and Kozhurin, 1996; Trifonov, 1997) was intended to store digitized fault geometry in uniform scale (1:5M) and with a unified set of attributes

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Summary

Introduction

The concept of an active fault emerged to distinguish a specific group of faults with present tectonic movements and with anticipated activity in the nearest future. The term “active fault” and its synonym “living fault” were introduced in the 25 late 1940s to 1950s by both American and European authors (Wallace, 1949; Geologische Rundschau, 1955) This group of faults has a particular significance in two aspects of geological studies. The Geological Institute of the Russian Academy of Sciences, Moscow, hosted the data on active faults of Eurasia provided by project members. These source data were represented in different scales and formats (maps, tables, 35 descriptions, and papers), so the first database (DB96) of active faults of Eurasia (Ioffe et al, 1993; Ioffe and Kozhurin, 1996; Trifonov, 1997) was intended to store digitized fault geometry in uniform scale (1:5M) and with a unified set of attributes. The result of this work is the Active Faults of Eurasia Database (AFEAD) presented in this paper (Fig. 1)

The Concept of an Active Fault
Database Model
Geometry
Attributes Transferred from Source Data
Derivative Attributes
Reference List
General characteristics
Conclusion
Findings
300 Acknowledgements
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