期刊
TECTONOPHYSICS
卷 447, 期 1-4, 页码 117-126出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.tecto.2006.09.019
关键词
Iceland; Tjornes fracture zone; microearthquake mapping; historical earthquakes; tectonic/magmatic interplay; fluid triggered seismic activity; time-dependent hazard assessment
The Tjornes facture zone (TFZ) connects the EW extension of the Mid-Atlantic ridge north of Iceland to the extension of the North volcanic zone (NVZ) of Iceland. Earthquakes up to magnitude 7 (Ms) can occur in TFZ, volcanic eruptions have been observed and large crustal deformations are expected in similar way as have been observed in the NVZ. Most of the zone is below ocean, which limits the historical information and geological observations. For studying the dynamics of the zone we must rely on interpretation and modelling based on seismic observations, especially on microearthquake observations for the last 10 years. In this paper we demonstrate how microearthquakes can be applied to map the details of the plate boundary, and how this information can be applied to find epicenters and fault planes of large historical earthquakes, also how seismic information can be applied in dynamic modelling and to infer spatial and temporal interplay in activity, and to enhance hazard assessment. (C) 2007 Elsevier B.V. All rights reserved.
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