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Titolo:
Splay fault and megathrust earthquake slip in the Nankai Trough
Autore:
Cummins, PR; Hori, T; Kaneda, Y;
Indirizzi:
Japan Marine Sci & Technol Ctr, Frontier Res Program Subduct Dynam, Yokosuka, Kanagawa, Japan Japan Marine Sci & Technol Ctr Yokosuka Kanagawa Japan , Kanagawa, Japan
Titolo Testata:
EARTH PLANETS AND SPACE
fascicolo: 4, volume: 53, anno: 2001,
pagine: 243 - 248
SICI:
1343-8832(2001)53:4<243:SFAMES>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUBDUCTION ZONE; SOUTHWEST JAPAN; PLATE; TECTONICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Cummins, PR Japan Marine Sci & Technol Ctr, Frontier Res Program Subduct Dynam, 2-15 Natsushima Cho, Yokosuka, Kanagawa, Japan Japan Marine Sci & Technol Ctr 2-15 Natsushima Cho Yokosuka Kanagawa Japan
Citazione:
P.R. Cummins et al., "Splay fault and megathrust earthquake slip in the Nankai Trough", EARTH PL SP, 53(4), 2001, pp. 243-248

Abstract

We consider whether splay fault slip may be a factor influencing the behavior of megathrust earthquakes in the Nankai Trough. Consideration of tsunami inversion results from other studies indicates that slip on one or more splay faults may be particularly important for the segment of the Nankai Trough offshore western Shikoku. These results suggest that during at least two megathrust earthquakes substantial slip may have occurred on one or more splay faults which cut the island are crust over 100 km landward of the trench axis. In contrast to smaller subsidiary thrusts in the semi-consolidated and unconsolidated sediments very near the trough axis, the crustal faults considered here could accumulate and release considerable tectonic stress. Through a simple finite element calculation we demonstrate that slip on such faults can release some of the shear stress on the megathrust accumulated through plate subduction, and therefore may have some influence on the behavior of megathrust earthquakes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/04/20 alle ore 11:08:41