Thierer, Peter O., Flueh, Ernst R., Kopp, Heidrun , Tilmann, Frederik, Comte, D. and Contreras, S. (2005) Local earthquake monitoring offshore Valparaiso, Chile. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 236 (1-2). pp. 173-183.

Text Thierer.pdf - Reprinted Version Restricted to Registered users only Download (434kB) | Contact

Abstract

On the central Chilean continental margin off Valparaiso a temporary
marine seismological network on the incoming Nazca Plate was supplemented by
the Central Chilean Network and a number of temporary landstations. Simultaneous
inversion of the complete marine earthquake data set yielded hypocenter
distributions from minimum 1-D modeling. These show a considerable seismic activity
within the 15 km - 60 km depth range with a maximum number of events
between 20 km and 40 km. The distribution shows three areas of increased activity:
the O'Higgins Seamount Group on the oceanic plate, the San Antonio Canyon
and the northeastern portion of the Valparaiso Basin. There is a marked difference
in the distance between the trench and the onset of seismic activity between the
San Antonio Canyon area and the Valparaiso Basin area.

Actions (login required)

View Item