Seismotectonic deformation in the contact area of the Nazca and south American lithospheric plates in relation to the February 27, 2010 MW 8.8 Maule earthquake

Standard

Seismotectonic deformation in the contact area of the Nazca and south American lithospheric plates in relation to the February 27, 2010 MW 8.8 Maule earthquake. / Dyadkov, P. G.; Kuchay; Romanenko, Yu M.

In: Geodynamics and Tectonophysics, Vol. 8, No. 3, 01.01.2017, p. 655-671.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{06101325849b4d17b1e580c95731aff7,

title = "Seismotectonic deformation in the contact area of the Nazca and south American lithospheric plates in relation to the February 27, 2010 MW 8.8 Maule earthquake",

abstract = "Based on the data on earthquake focal mechanisms, we estimated seismotectonic deformation related to the 2010 Мw 8.8 Maule earthquake and analyzed the deformation at different depths. In the main seismic dislocation of the Maule earthquake and the northern area, the deformation field to a depth of 70 km is typical of subduction zones as evidenced by shortening in the direction of the oceanic plate subduction. Below a depth of 70 km, the deformation pattern changes sharply to horizontal stretching. After the main seismic event, as well as before it, near-latitudinal shortening was dominant in the focal zone, while the region of the main seismic dislocations was surrounded by separate areas of near-latitudinal stretching, which is an opposite type of deformation. We conducted a detailed analysis of the seismotectonic deformations in the oceanic uplift area to the west of the deep-water trough and identified local zones of near-latitudinal stretching near the southern and northern boundaries of the future Maule earthquake zone. Detecting such zones can provide important data for early forecasting of regions wherein strong subduction-related earthquakes are being prepared.",

keywords = "2010 Maule earthquake, Aftershock, Chile, Earthquake focal mechanism, Earthquake preparation, Nazca plate, Seismotectonic deformation, earthquake focal mechanism, aftershock, SEISMIC GAP, GPS, seismotectonic deformation, earthquake preparation",

author = "Dyadkov, {P. G.} and Kuchay and Romanenko, {Yu M.}",

year = "2017",

month = jan,

day = "1",

doi = "10.5800/GT-2017-8-3-0311",

language = "English",

volume = "8",

pages = "655--671",

journal = "Geodynamics and Tectonophysics",

issn = "2078-502X",

publisher = "Institute of the Earth's Crust",

number = "3",

}

RIS

TY - JOUR

T1 - Seismotectonic deformation in the contact area of the Nazca and south American lithospheric plates in relation to the February 27, 2010 MW 8.8 Maule earthquake

AU - Dyadkov, P. G.

AU - Kuchay,

AU - Romanenko, Yu M.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Based on the data on earthquake focal mechanisms, we estimated seismotectonic deformation related to the 2010 Мw 8.8 Maule earthquake and analyzed the deformation at different depths. In the main seismic dislocation of the Maule earthquake and the northern area, the deformation field to a depth of 70 km is typical of subduction zones as evidenced by shortening in the direction of the oceanic plate subduction. Below a depth of 70 km, the deformation pattern changes sharply to horizontal stretching. After the main seismic event, as well as before it, near-latitudinal shortening was dominant in the focal zone, while the region of the main seismic dislocations was surrounded by separate areas of near-latitudinal stretching, which is an opposite type of deformation. We conducted a detailed analysis of the seismotectonic deformations in the oceanic uplift area to the west of the deep-water trough and identified local zones of near-latitudinal stretching near the southern and northern boundaries of the future Maule earthquake zone. Detecting such zones can provide important data for early forecasting of regions wherein strong subduction-related earthquakes are being prepared.

AB - Based on the data on earthquake focal mechanisms, we estimated seismotectonic deformation related to the 2010 Мw 8.8 Maule earthquake and analyzed the deformation at different depths. In the main seismic dislocation of the Maule earthquake and the northern area, the deformation field to a depth of 70 km is typical of subduction zones as evidenced by shortening in the direction of the oceanic plate subduction. Below a depth of 70 km, the deformation pattern changes sharply to horizontal stretching. After the main seismic event, as well as before it, near-latitudinal shortening was dominant in the focal zone, while the region of the main seismic dislocations was surrounded by separate areas of near-latitudinal stretching, which is an opposite type of deformation. We conducted a detailed analysis of the seismotectonic deformations in the oceanic uplift area to the west of the deep-water trough and identified local zones of near-latitudinal stretching near the southern and northern boundaries of the future Maule earthquake zone. Detecting such zones can provide important data for early forecasting of regions wherein strong subduction-related earthquakes are being prepared.

KW - 2010 Maule earthquake

KW - Aftershock

KW - Chile

KW - Earthquake focal mechanism

KW - Earthquake preparation

KW - Nazca plate

KW - Seismotectonic deformation

KW - earthquake focal mechanism

KW - aftershock

KW - SEISMIC GAP

KW - GPS

KW - seismotectonic deformation

KW - earthquake preparation

UR - http://www.scopus.com/inward/record.url?scp=85042352665&partnerID=8YFLogxK

U2 - 10.5800/GT-2017-8-3-0311

DO - 10.5800/GT-2017-8-3-0311

M3 - Article

AN - SCOPUS:85042352665

VL - 8

SP - 655

EP - 671

JO - Geodynamics and Tectonophysics

JF - Geodynamics and Tectonophysics

SN - 2078-502X

IS - 3

ER -

ID: 10454474