Possible interaction between tectonic events and seismic noise at Las Cañadas Volcanic Caldera, Tenerife, Spain

Author: Carniel Roberto  

Publisher: Springer Publishing Company

ISSN: 0258-8900

Source: Bulletin of Volcanology, Vol.70, Iss.9, 2008-09, pp. : 1113-1121

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Abstract

Continuous seismic noise is recorded in the volcanic island of Tenerife (Canary Islands, Spain). The origin of this noise, strongly augmented by anthropogenic contamination, is still under debate. In this paper, we discuss the relationship between this noise and the occurrence of local tectonic events in the same area. In particular, transitions are sought in the time evolution of dynamic parameters computed on the seismic noise, and examples are shown where abrupt transitions may be associated with the occurrence of tectonic events. These transitions provide further evidence of the existence of a natural origin for at least part of the seismic noise, which is strongly contaminated—if not dominated—by anthropogenic sources.