Database and map of Quaternary faults and folds of Ecuador and its offshore regions

Eguez, Arturo; Alvarado, Alexandra; Yépes, Hugo; Machette, Michael N.; Costa, Carlos H.; Dart, Richard L.

doi:10.3133/ofr03289

Cited by 50 publications

(79 citation statements)

References 3 publications

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“…These are reactivated faults which formed during Cretaceous and early Tertiary events of accretion along the continental South American margin (Litherland et al, 1994;Spikings et al, 2005). The IV is characterised by the presence of several basins filled with volcanoclastic Eguez et al, 2003;Tibaldi et al, 2007). and sedimentary deposits of Miocene to Pliocene age, overlying either the basement rocks of the cordilleras or the volcanic succession of Miocene to Oligocene age, and by the presence of several volcanoes along its borders.…”

Section: The Interandean Valleymentioning

confidence: 97%

“…Global and Planetary Change j o u r n a l h o m e p a g e : w w w. e l s ev i e r. c o m / l o c a t e / g l o p l a c h a linked to blind reverse faults (Eguez et al, 2003). Some of these folds have a complex geometry whereas in other cases the fold vergence is not very well marked.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 98%

“…The database and map of Quaternary faults and folds of Ecuador and its offshore regions (Eguez et al, 2003) also describe the known active tectonic structures of the IV. Here we summarise the characteristics of the faults and folds of interest in this study.…”

Section: The Known Active Tectonic Structuresmentioning

confidence: 99%

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Quaternary tectonics in the central Interandean Valley, Ecuador: Fault-propagation folds, transfer faults and the Cotopaxi Volcano

Fiorini

Tibaldi

2012

Global and Planetary Change

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Section: The Interandean Valleymentioning

confidence: 97%

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 98%

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Quaternary tectonics in the central Interandean Valley, Ecuador: Fault-propagation folds, transfer faults and the Cotopaxi Volcano

Fiorini

Tibaldi

2012

Global and Planetary Change

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“…Si acep ta mos que la sis mi ci dad de Pi sa yam bo es tá re la cio na da con even tos de fa llas su per fi cia les co mo lo su gie ren es tu dios geo ló gi cos y geo grá fi cos (Eguez et al, 2003), se ha ce ne ce sa rio ob te ner la ima gen sís mi ca de di chas fa llas. De ahí la im por tan cia de la uti li za ción del pro gra ma hy poDD que es tá en fo ca do al tra ta miento de la sis mi ci dad de es te ti po de fe nó me nos.…”

Section: Lo Ca LI Za Ción Ini Cial Del Clus Ter De Pi Sayam Bounclassified

Relocalización por dobles diferencias del cluster sísmico de Pisayambo

Araujo

Troncoso

Ruiz

2009

lgr

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Re su menEn es te ar tí cu lo se pre sen tan los re sul ta dos de la re lo ca li za ción de sis mos re la cio na dos con el clus ter sís mi co de Pi sayam bo, pro vin cia de Tun gu ra hua en Ecua dor. Se uti li za el pro gra ma hy poDD ba sa do en el mé to do de do bles di fe rencias. Los re sul ta dos ob te ni dos ofre cen evi den cia so bre even tos en Pi sa yam bo que de fi nen una re gión caó ti ca de fo cos sís mi cos su perf icia les. Es te tra ba jo es una mues tra im por tan te del fun cio na mien to del pro gram hy poDD pa ra el ca so de pro ble mas sís mi cos al ta men te no li nea les y sub de ter mi na dos.Pa la bras cla ve: Pisayambo, sismología, dobles diferencias, hypoDD, problemas inversos. SummaryThis study reports the results of relocation of seismic events related to the seismic cluster of Pisayambo, in the Province of Tungurahua, Ecuador. The software hypoDD was used which is based in the method of double difference. The results thus obtained are evidence of the events in Pisayambo which define a chaotic region of seismic foci, all of them very superficial. This work shows the functioning of the hypoDD software in the case of highly nonlinear and underdetermined seismic problems.Keywords: Pisayambo, seismology, double difference, hypoDD, inverse problems.Re lo ca li za ción por do bles di fe ren cias del clus ter sís mi co de Pi sa yam bo Double difference relocation at Pisayambo seismic cluster

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“…Active tectonics is dominated by large faults [33] that separate different tectonic regimes including the coastal region, where the subduction of the Carnegie Ridge and the oblique subduction control active structures; the North Andean Block, limited by a NNE dextral strike-slip fault system; and the Eastern Andean Frontal fault zone that limits the North Andean block along the Subandean region. These crustal faults are capable of producing earthquakes, such as the 1987 Ms 6.9 earthquake [34].…”

Section: Study Areamentioning

confidence: 99%

InSAR-Based Mapping to Support Decision-Making after an Earthquake

et al. 2018

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It has long been recognized that earthquakes change the stress in the upper crust around the fault rupture and can influence the behaviour of neighbouring faults and volcanoes. Rapid estimates of these stress changes can provide the authorities managing the post-disaster situation with valuable data to identify and monitor potential threads and to update the estimates of seismic and volcanic hazard in a region. Here we propose a methodology to evaluate the potential influence of an earthquake on nearby faults and volcanoes and create easy-to-understand maps for decision-making support after large earthquakes. We apply this methodology to the Mw 7.8, 2016 Ecuador earthquake. Using Sentinel-1 Interferometric Synthetic Aperture Radar (InSAR) and continuous GPS data, we measure the coseismic ground deformation and estimate the distribution of slip over the fault rupture. We also build an alternative source model using the Global Centroid Moment Tensor (CMT) solution. Then we use these models to evaluate changes of static stress on the surrounding faults and volcanoes and produce maps of potentially activated faults and volcanoes. We found, in general, good agreement between our maps and the seismic and volcanic events that occurred after the Pedernales earthquake. We discuss the potential and limitations of the methodology.

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Database and map of Quaternary faults and folds of Ecuador and its offshore regions

Cited by 50 publications

References 3 publications

Quaternary tectonics in the central Interandean Valley, Ecuador: Fault-propagation folds, transfer faults and the Cotopaxi Volcano

Quaternary tectonics in the central Interandean Valley, Ecuador: Fault-propagation folds, transfer faults and the Cotopaxi Volcano

Relocalización por dobles diferencias del cluster sísmico de Pisayambo

InSAR-Based Mapping to Support Decision-Making after an Earthquake

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