Subducting seamounts control interplate coupling and seismic rupture in the 2014 Iquique earthquake area

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Subducting seamounts control interplate coupling and seismic rupture in the 2014 Iquique earthquake area

To date, the parameters that determine the rupture area of great subduction zone earthquakes remain contentious. On 1 April 2014, the Mw 8.1 Iquique earthquake ruptured a portion of the well-recognized northern Chile seismic gap but left large highly coupled areas un-ruptured. Marine seismic reflection and swath bathymetric data indicate that structural variations in the subducting Nazca Plate ...

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Accelerated nucleation of the 2014 Iquique, Chile Mw 8.2 Earthquake

The earthquake nucleation process has been vigorously investigated based on geophysical observations, laboratory experiments, and theoretical studies; however, a general consensus has yet to be achieved. Here, we studied nucleation process for the 2014 Iquique, Chile Mw 8.2 megathrust earthquake located within the current North Chile seismic gap, by analyzing a long-term earthquake catalog cons...

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Intense foreshocks and a slow slip event preceded the 2014 Iquique Mw 8.1 earthquake.

The subduction zone in northern Chile is a well-identified seismic gap that last ruptured in 1877. The moment magnitude (Mw) 8.1 Iquique earthquake of 1 April 2014 broke a highly coupled portion of this gap. To understand the seismicity preceding this event, we studied the location and mechanisms of the foreshocks and computed Global Positioning System (GPS) time series at stations located on s...

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The temporal distribution of seismic radiation during deep earthquake rupture.

The time history of energy release during earthquakes illuminates the process of failure, which remains enigmatic for events deeper than about 100 kilometers. Stacks of teleseismic records from regional arrays for 122 intermediate (depths of 100 to 350 kilometers) and deep (depths of 350 to 700 kilometers) earthquakes show that the temporal pattern of short-period seismic radiation has a system...

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Effects of subducted seamounts on megathrust earthquake nucleation and rupture propagation

[1] Subducted seamounts have been linked to interplate earthquakes, but their specific effects on earthquake mechanism remain controversial. A key question is under what conditions a subducted seamount will generate or stop megathrust earthquakes. Here we show results from numerical experiments in the framework of rateand state-dependent friction law in which a seamount is characterized as a pa...

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ژورنال

عنوان ژورنال: Nature Communications

سال: 2015

ISSN: 2041-1723

DOI: 10.1038/ncomms9267