The Nazca-South American convergence rate and the recurrence of the great 1960 Chilean earthquake
The seismic slip rate along the Chile Trench estimated from the slip in the great 1960 earthquake and the recurrence history of major earthquakes has been interpreted as consistent with the subduction rate of the Nazca plate beneath South America. The convergence rate, estimated from global relative...
Main Authors: | , , , , |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
1986
|
Subjects: | |
Online Access: | http://ntrs.nasa.gov/search.jsp?R=19870026454 |
id |
ftnasantrs:oai:casi.ntrs.nasa.gov:19870026454 |
---|---|
record_format |
openpolar |
spelling |
ftnasantrs:oai:casi.ntrs.nasa.gov:19870026454 2023-05-15T14:01:08+02:00 The Nazca-South American convergence rate and the recurrence of the great 1960 Chilean earthquake Stein, S. Engeln, J. F. Demets, C. Gordon, R. G. Woods, D. Unclassified, Unlimited, Publicly available Aug 1, 1986 http://ntrs.nasa.gov/search.jsp?R=19870026454 unknown http://ntrs.nasa.gov/search.jsp?R=19870026454 Accession ID: 87A13728 Copyright Other Sources 46 Geophysical Research Letters; 13; 713-716 1986 ftnasantrs 2012-02-15T17:06:37Z The seismic slip rate along the Chile Trench estimated from the slip in the great 1960 earthquake and the recurrence history of major earthquakes has been interpreted as consistent with the subduction rate of the Nazca plate beneath South America. The convergence rate, estimated from global relative plate motion models, depends significantly on closure of the Nazca - Antarctica - South America circuit. NUVEL-1, a new plate motion model which incorporates recently determined spreading rates on the Chile Rise, shows that the average convergence rate over the last three million years is slower than previously estimated. If this time-averaged convergence rate provides an appropriate upper bound for the seismic slip rate, either the characteristic Chilean subduction earthquake is smaller than the 1960 event, the average recurrence interval is greater than observed in the last 400 years, or both. These observations bear out the nonuniformity of plate motions on various time scales, the variability in characteristic subduction zone earthquake size, and the limitations of recurrence time estimates. Other/Unknown Material Antarc* Antarctica NASA Technical Reports Server (NTRS) Chile Trench ENVELOPE(-75.760,-75.760,-53.123,-53.123) |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
46 |
spellingShingle |
46 Stein, S. Engeln, J. F. Demets, C. Gordon, R. G. Woods, D. The Nazca-South American convergence rate and the recurrence of the great 1960 Chilean earthquake |
topic_facet |
46 |
description |
The seismic slip rate along the Chile Trench estimated from the slip in the great 1960 earthquake and the recurrence history of major earthquakes has been interpreted as consistent with the subduction rate of the Nazca plate beneath South America. The convergence rate, estimated from global relative plate motion models, depends significantly on closure of the Nazca - Antarctica - South America circuit. NUVEL-1, a new plate motion model which incorporates recently determined spreading rates on the Chile Rise, shows that the average convergence rate over the last three million years is slower than previously estimated. If this time-averaged convergence rate provides an appropriate upper bound for the seismic slip rate, either the characteristic Chilean subduction earthquake is smaller than the 1960 event, the average recurrence interval is greater than observed in the last 400 years, or both. These observations bear out the nonuniformity of plate motions on various time scales, the variability in characteristic subduction zone earthquake size, and the limitations of recurrence time estimates. |
format |
Other/Unknown Material |
author |
Stein, S. Engeln, J. F. Demets, C. Gordon, R. G. Woods, D. |
author_facet |
Stein, S. Engeln, J. F. Demets, C. Gordon, R. G. Woods, D. |
author_sort |
Stein, S. |
title |
The Nazca-South American convergence rate and the recurrence of the great 1960 Chilean earthquake |
title_short |
The Nazca-South American convergence rate and the recurrence of the great 1960 Chilean earthquake |
title_full |
The Nazca-South American convergence rate and the recurrence of the great 1960 Chilean earthquake |
title_fullStr |
The Nazca-South American convergence rate and the recurrence of the great 1960 Chilean earthquake |
title_full_unstemmed |
The Nazca-South American convergence rate and the recurrence of the great 1960 Chilean earthquake |
title_sort |
nazca-south american convergence rate and the recurrence of the great 1960 chilean earthquake |
publishDate |
1986 |
url |
http://ntrs.nasa.gov/search.jsp?R=19870026454 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(-75.760,-75.760,-53.123,-53.123) |
geographic |
Chile Trench |
geographic_facet |
Chile Trench |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19870026454 Accession ID: 87A13728 |
op_rights |
Copyright |
_version_ |
1766270729978904576 |