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Titolo:
Source mechanism of earthquakes in Peru
Autore:
Tavera, H; Buforn, E;
Indirizzi:
Univ Complutense Madrid, Dept Geofis, Madrid, Spain Univ Complutense Madrid Madrid Spain Madrid, Dept Geofis, Madrid, Spain
Titolo Testata:
JOURNAL OF SEISMOLOGY
fascicolo: 4, volume: 5, anno: 2001,
pagine: 519 - 539
SICI:
1383-4649(2001)5:4<519:SMOEIP>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLATE BENEATH PERU; DEEP BOLIVIA EARTHQUAKE; SUBDUCTED NAZCA PLATE; WESTERN SOUTH-AMERICA; TECTONIC DEFORMATION; SPATIAL-DISTRIBUTION; MANTLE EARTHQUAKES; SOURCE PARAMETERS; CENTRAL ANDES; SEISMICITY;
Keywords:
earthquakes in Peru; reverse faulting; source rupture process; subduction;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
68
Recensione:
Indirizzi per estratti:
Indirizzo: Tavera, H Univ Complutense Madrid, Dept Geofis, Madrid, Spain Univ Complutense Madrid Madrid Spain pt Geofis, Madrid, Spain
Citazione:
H. Tavera e E. Buforn, "Source mechanism of earthquakes in Peru", J SEISMOL, 5(4), 2001, pp. 519-539

Abstract

The source mechanism of 19 earthquakes that occurred in Peru (1990-1996) is studied using broad band data. Focal mechanisms are obtained using polarities of P wave and body wave form inversion. Shallow earthquakes show complex source time functions, intermediate and deep depth shocks have simpler ones. Stress distributions have been obtained from focal mechanisms estimated in this study and previous studies. Shallow earthquakes show reverse faulting with an ENE-WSW to E-W oriented pressure axes. Intermediate depth shocks indicate horizontal extension on E-W direction, normal to the Peru-Chilean trench. Earthquakes with foci at very deep depth show horizontal extension in the E-W direction in Peru-Brazil and N-S in Peru-Bolivia borders. This difference in stress orientation may indicate a different origin for deepactivity at each region.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 08:22:01