Long-term magnetic anomalies and their possible relationship to the latest greater Chilean earthquakes in the context of the seismo-electromagnetic theory
Enrique Guillermo Cordaro,Patricio Venegas-Aravena,and David Laroze
Enrique Guillermo Cordaro
Observatorios de Radiación Cósmica y Geomagnetismo, Departamento
de Física, FCFM, Universidad de Chile, Casilla 487-3, Santiago,
Chile
Facultad de Ingeniería, Universidad Autónoma de Chile, Pedro de
Valdivia 425, Santiago, Chile
Observatorios de Radiación Cósmica y Geomagnetismo, Departamento
de Física, FCFM, Universidad de Chile, Casilla 487-3, Santiago,
Chile
Department of Structural and Geotechnical Engineering, School of
Engineering, Pontificia Universidad Católica de Chile, Vicuña
Mackenna 4860, Macul, Santiago, Chile
Research Center for Integrated Disaster Risk Management (CIGIDEN),
Santiago, Chile
David Laroze
Instituto de Alta Investigación, Universidad de Tarapacá, Casilla
7D, Arica, Chile
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We developed a methodology that generates free externally disturbed magnetic variations in ground magnetometers close to the Chilean convergent margin. Spectral analysis (~ mHz) and magnetic anomalies increased prior to large Chilean earthquakes (Maule 2010, Mw 8.8; Iquique 2014, Mw 8.2; Illapel 2015, Mw 8.3). These findings relate to microcracks within the lithosphere due to stress state changes. This physical evidence should be thought of as a last stage of the earthquake preparation process.
We developed a methodology that generates free externally disturbed magnetic variations in...
