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April 19, 2021 (v1)Conference paperUploaded on: December 4, 2022
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December 13, 2021 (v1)Conference paperLarge Afterslip with Episodic Slip Acceleration following the Mw 7.8 Perdernales Earthquake, Ecuador
We analyze continuous GPS measurements along the central Ecuador subduction segment to quantify three years of postseismic deformation that followed the Mw 7.8 April 16 2016 Pedernales earthquake. We perform a kinematic inversion solving for the daily slip along the subduction interface to retrieve the afterslip evolution through space and...
Uploaded on: December 4, 2022 -
2020 (v1)Publication
In subduction zones, slip along the plate interface occurs in various modes including earthquakes, steady slip, and transient accelerated aseismic slip during either Slow Slip Events (SSE) or afterslip. We analyze continuous GPS measurements along the central Ecuador subduction segment to illuminate how the different slip modes are organized in...
Uploaded on: December 4, 2022 -
April 19, 2021 (v1)Conference paper
The North Andean Sliver (hereinafter NAS) lies at the northwestern end of the South American plate (hereinafter SOAM). This extensive area exhibits a complex deformation process controlled by the interactions of Nazca, Caribbean, South America plates, and Panama block, producing crustal seismicity, arc-continental collision, and subduction...
Uploaded on: December 4, 2022 -
March 12, 2024 (v1)Journal article
GNSS is a standard tool for monitoring and studying the Earth's dynamic environment. However, the development of dense GNSS measurements remains limited in many experiments by the cost of high-class geodetic equipment to achieve the high precision required by many applications. Recently, multi-constellation, multi-frequency, low-power and,...
Uploaded on: March 16, 2024 -
July 16, 2017 (v1)Journal article
Cotopaxi volcano started a period of volcanic unrest in April 2015 that led to a series of eruptions between August and November 2015. We use COSMO‐SkyMed Interferometric Synthetic Aperture Radar supported by continuous GPS observations spanning the period of 2014–2016 to obtain time‐dependent ground deformation data over Cotopaxi volcano...
Uploaded on: December 4, 2022 -
April 24, 2023 (v1)Publication
In Northern Andes, oblique subduction of the Nazca plate below the South America Plate induces a northward motion of the North Andean Sliver, at a rate of ~10 mm/yr with respect to Stable South America. In Ecuador in particular, the associated strain is mainly accomodated along the large Chingual-Cosanga-Puna-Pallatanga (CCPP) fault system,...
Uploaded on: October 11, 2023 -
2023 (v1)Journal article
The 2019/05/26 Northern Peru earthquake (Mw = 8) is a major intermediate-depth earthquake that occurred close to the eastern edge of the Nazca slab flat area. We analyze its rupture process using high-frequency back-projection and seismo-geodetic broadband inversion. The latter approach shows that the earthquake propagated with almost purely...
Uploaded on: February 22, 2023 -
September 24, 2019 (v1)Conference paper
Along the Ecuadorian margin, the North Andean Sliver is moving in the northeastward direction due tothe oblique subduction of the Nazca plate. The opening of the gulf of Guayaquil is a consequence of thismotion. Two principal models compete to explain the opening. One proposes an opening achievedessentially with strike slip motion along a...
Uploaded on: December 3, 2022 -
May 14, 2018 (v1)Conference paper
International audience
Uploaded on: December 4, 2022 -
May 14, 2018 (v1)Conference paper
International audience
Uploaded on: February 22, 2023 -
September 10, 2018 (v1)Conference paper
International audience
Uploaded on: December 4, 2022 -
May 2017 (v1)Journal article
Whether subducted oceanic reliefs such as seamounts promote seismic rupture or aseismic slip remains controversial. Here we use swath bathymetry, prestack depth-migrated multichannel seismic reflection lines, and wide-angle seismic data collected across the central Ecuador subduction segment to reveal a broad ~55 km × 50 km, ~1.5–2.0 km high,...
Uploaded on: December 4, 2022 -
February 14, 2018 (v1)Journal article
The continuous Global Positioning System (cGPS) network operating in the northern Andes (Ecuador and Colombia) for about a decade has the main objectives of quantifying interseismic coupling along the subduction interface, detecting occurrence of transient aseismic episodic slip, detailing the rupture kinematics of large earthquakes, recording...
Uploaded on: February 28, 2023 -
July 2018 (v1)Journal article
A temporary onshore‐offshore seismic network deployed during the 2‐year period of the Observación SISmológica en ECuador project provides a detailed and well‐focused image of the seismicity for magnitudes as low as 2.1 at the Central Ecuadorian subduction zone. During this 2‐year experiment, the shallow and locked subduction patch shows little...
Uploaded on: December 4, 2022 -
January 31, 2018 (v1)Journal article
At subduction zones, transient aseismic slip occurs either as afterslip following a large earthquake or as episodic slow slip events during the interseismic period. Afterslip and slow slip events are usually considered as distinct processes occurring on separate fault areas governed by different frictional properties. Continuous GPS (Global...
Uploaded on: December 4, 2022 -
October 2019 (v1)Journal article
High-Rate (HR) GPS time series following the 2016 Mw 7.8 Pedernales earthquake suggest significant postseismic deformation occurring in the early postseismic period (i.e. first few hours after the earthquake) that is not resolved with daily GPS time series. To understand the characteristics of early postseismic deformation, and its relationship...
Uploaded on: December 4, 2022 -
May 2018 (v1)Publication
The Mw7.8 Pedernales earthquake is associated with the subduction of the Nazca Plate beneath the South American Plate. The mainshock caused many casualties and widespread damages across the Manabi province. The 150 km-long coseismic rupture area is found beneath the coastline, near 25 km depth. The rupture propagated southward and involved the...
Uploaded on: December 4, 2022