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

P. G. Dyadkov, Kuchay, Yu M. Romanenko

Результат исследования: Научные публикации в периодических изданияхстатья

1 Цитирования (Scopus)

Аннотация

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.

Язык оригиналаанглийский
Страницы (с-по)655-671
Число страниц17
ЖурналGeodynamics and Tectonophysics
Том8
Номер выпуска3
DOI
СостояниеОпубликовано - 1 янв 2017

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