Author | dc.contributor.author | Ruiz Tapia, Sergio | |
Author | dc.contributor.author | Kausel Vecchiola, Edgar | es_CL |
Author | dc.contributor.author | Campos Muñoz, Jaime | es_CL |
Author | dc.contributor.author | Saragoni, G. R. | es_CL |
Author | dc.contributor.author | Madariaga, R. | es_CL |
Admission date | dc.date.accessioned | 2012-01-02T18:02:07Z | |
Available date | dc.date.available | 2012-01-02T18:02:07Z | |
Publication date | dc.date.issued | 2011 | |
Cita de ítem | dc.identifier.citation | Pure Appl. Geophys. 168 (2011), 125–139 | es_CL |
Identifier | dc.identifier.other | DOI 10.1007/s00024-010-0117-x | |
Identifier | dc.identifier.uri | https://repositorio.uchile.cl/handle/2250/125566 | |
General note | dc.description | Artículo de publicación ISI | es_CL |
Abstract | dc.description.abstract | The Chilean subduction zone is one of the most
active of the world with M = 8 or larger interplate thrust earthquakes
occurring every 10 years or so on the average. The
identification and characterization of pulses propagated from
dominant asperities that control the rupture of these earthquakes is
an important problem for seismology and especially for seismic
hazard assessment since it can reduce the earthquake destructiveness
potential. A number of studies of large Chilean earthquakes
have revealed that the source time functions of these events are
composed of a number of distinct energy arrivals. In this paper, we
identify and characterize the high frequency pulses of dominant
asperities using near source strong motion records. Two very well
recorded interplate earthquakes, the 1985 Central Chile (Ms = 7.8)
and the 2007 Tocopilla (Mw = 7.7), are considered. In particular,
the 2007 Tocopilla earthquake was recorded by a network with
absolute time and continuos recording. From the study of these
strong motion data it is possible to identify the arrival of large
pulses coming from different dominant asperities. The recognition
of the key role of dominant asperities in seismic hazard assessment
can reduce overestimations due to scattering of attenuation formulas
that consider epicentral distance or shortest distance to the
fault rather than the asperity distance. The location and number of
dominant asperities, their shape, the amplitude and arrival time of
pulses can be one of the principal factors influencing Chilean
seismic hazard assessment and seismic design. The high frequency
pulses identified in this paper have permitted us to extend the range
of frequency in which the 1985 Central Chile and 2007 Tocopilla
earthquakes were studied. This should allow in the future the
introduction of this seismological result in the seismic design of
earthquake engineering. | es_CL |
Patrocinador | dc.description.sponsorship | This research has been partially
funded by Millennium Nucleus Program
‘‘Montessus de Ballore—IERC’’, Mideplan, Chile. | es_CL |
Lenguage | dc.language.iso | en | es_CL |
Título | dc.title | Identification of High Frequency Pulses from Earthquake Asperities Along Chilean Subduction Zone Using Strong Motion | es_CL |
Document type | dc.type | Artículo de revista | |