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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The tailings dam failure of 5 November 2015 in SE Brazil and its preceding seismic sequence

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Author(s):
Agurto-Detzel, H. [1] ; Bianchi, M. [1] ; Assumpcao, M. [1] ; Schimmel, M. [2] ; Collaco, B. [1] ; Ciardelli, C. [1] ; Barbosa, J. R. [1] ; Calhau, J. [1]
Total Authors: 8
Affiliation:
[1] Univ Sao Paulo, Inst Astron Geophys & Atmospher Sci, Seismol Ctr, Sao Paulo - Brazil
[2] Inst Earth Sci Jaume Almera CSIC, Barcelona - Spain
Total Affiliations: 2
Document type: Journal article
Source: Geophysical Research Letters; v. 43, n. 10, p. 4929-4936, MAY 28 2016.
Web of Science Citations: 9
Abstract

The collapse of a mine tailings dam and subsequent flood in SE Brazil on 5 November 2015 was preceded by a small-magnitude seismic sequence. In this report, we explore the spatiotemporal associations between the seismic events and the accident and discuss their possible connection. We also analyze the signals generated by the turbulent mudflow, as recorded by the Brazilian Seismographic Network (RSBR). In light of our observations, we propose as possible contributing factor for the dam collapse either ground shaking and/or soil liquefaction triggered by the earthquakes. The possibility of such a small-magnitude earthquake contributing to the collapse of a tailings dam raises important concerns regarding safety and related legislation of dams in Brazil and the world. (AU)

FAPESP's process: 14/09455-3 - Induced earthquakes in Bebedouro, SE Brazil: seismicity, velocity structure and focal mechanisms
Grantee:Hans Alex Agurto Detzel
Support type: Scholarships in Brazil - Post-Doctorate