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Por | Lara, Pablo; Bletery, Quentin; Ampuero, Jean-Paul; Inza Callupe, Lamberto Adolfo; Tavera, Hernando (American Geophysical Union, 2023-11-02)

Earthquake Early Warning Starting From 3 s of Records on a Single Station With Machine Learning

We introduce the Ensemble Earthquake Early Warning System (E3WS), a set of Machine Learning (ML) algorithms designed to detect, locate, and estimate the magnitude of an earthquake starting from 3 s of P-waves recorded by a single station. The system is made of six Ensemble ML algorithms trained on ...
- Earthquake Early Warning System
- Single station
- Machine Learning
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Por | Rivera, Marco; Samaniego, Pablo; Nauret, François; Mariño, Jersy; Liorzou, Céline (Elsevier, 2023-09-23)

Petrological and geochemical constraints on the magmatic evolution at the Ampato-Sabancaya compound volcano (Peru)

In order to gain insights into continental arc magmatic processes, we have conducted a petrological and geochemical study of major and trace elements and Sr, Nd, and Pb isotopes of the Ampato-Sabancaya compound volcano, which belongs to the Andean Central Volcanic Zone (CVZ). Whole-rock compositions ...
- Ampato
- Sabancaya
- Central Andes
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Por | Harpel, Christopher J.; Cuno, Juan José; Takach, Marie K.; Rivera, Marco; Aguilar, Rigoberto; Tepley III, Frank J. (Springer, 2023-08-14)

The late Pleistocene Sacarosa tephra-fall deposit, Misti Volcano, Arequipa, Peru: its magma, eruption, and implications for past and future activity

Between 38.5 ka cal BP and 32.4 ka cal BP, a dacitic Volcanic Explosivity Index 5 eruption at Misti volcano emplaced the Sacarosa tephra-fall deposit. Its biotite phenocrysts, fine grain size, scarce lithics, and abundant loose crystals characterize the deposit at locations sampled. The eruption’s ~ 800 ...
- Misti volcano
- Cayma stage
- Plinian eruption
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Por | Machacca, Roger; Lesage, Philippe; Tavera, Hernando; Pesicek, Jeremy D.; Caudron, Corentin; Torres Aguilar, José Luis ... (Elsevier, 2023-03)

The 2013–2020 seismic activity at Sabancaya Volcano (Peru): Long lasting unrest and eruption

Sabancaya volcano is the youngest and second most active volcano in Peru. It is part of the Ampato-Sabancaya volcanic complex which sits to the south of the ancient Hualca Hualca volcano and several frequently active faults, thus resulting in complex volcano-tectonic interactions. After 15 years of ...
- Sabancaya volcano
- Long-period events
- Repeating earthquakes
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Por | Lièvre, Pascal; Mérour, Eléonore; Morin, Julie; Macedo Franco, Luisa Diomira; Ramos Palomino, Domingo; Rivera, Marco ... (Frontiers Media, 2022-09-29)

Volcanic risk management practice evolution between vulnerability and resilience: the case of Arequipa in Peru

This paper proposes a new way of understanding the debate between vulnerability and resilience. We mobilize on the theoretical level the notion of “paradigm” in the sense of Kuhn and, on the methodological level, Foucault’s notion of “apparatus” to understand volcanic risk management practices. Through ...
- Vulnerability
- Resilience
- Paradigm
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Por | Thouret, J.-C.; Arapa, Evelyn; Charbonnier, S.; Guerrero, A.; Kelfoun, K.; Cordoba, G. ... (Frontiers Media, 2022-05-17)

Modeling tephra fall and sediment-water flows to assess their impacts on a vulnerable building stock in the city of Arequipa, Peru

Arequipa, Peru’s second economic center hosting c. 1,110,000 inhabitants, is the largest South American city exposed to a large variety of natural hazards. At least 200,000 live in areas likely to be affected by hazards from El Misti volcano, located 17 km to the NE. A multidisciplinary project aims ...
- Tephra fall
- Debris flow
- Numerical code
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Por | Cabrera-Pérez, Iván; Centeno Quico, Riky; Soubestre, Jean; D'Auria, Luca; Rivera, Marco; Machacca, Roger (Elsevier, 2022)

Ambient noise tomography of Misti volcano, Peru

To better understand the recent internal structure of Misti volcano, we determined a 3D S-wave velocity model applying Ambient Noise Tomography (ANT). We used data from 23 broadband and short-period seismic stations temporarily installed at Misti volcano between March and December 2011. This dataset ...
- Ambient noise tomography
- Transdimensional inversion
- Misti volcano
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Por | Alayo, Joel; Villegas Lanza, Juan Carlos (Universidad Nacional Mayor de San Marcos, 2021-12-16)

Estimación de desplazamientos ocasionados por deslizamientos de tierra en la ciudad de Huancabamba, Piura, mediante análisis de imágenes satelitales para el periodo 2017-2019

En este estudio se ha estimado y analizado los desplazamientos producidos por remociones en masa en la ciudad de Huancabamba y sus alrededores, aplicando procesos de correlación subpíxel, basado en transformadas de Fourier, a imágenes ópticas satelitales (SPOT 6 y Sentinel 2) para el periodo 2017-2019. ...
- Deslizamiento de tierra
- Correlación subpíxel de imágenes satelitales
- Desplazamientos superficiales
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Por | Ceferino, Luis; Galvez, Percy; Ampuero, Jean‐Paul; Kiremidjian, Anne; Deierlein, Gregory; Villegas Lanza, Juan Carlos (Seismological Society of America, 2021-12)

Bayesian parameter estimation for space and time interacting earthquake rupture model using historical and physics-based simulated earthquake catalogs

This article introduces a framework to supplement short historical catalogs with synthetic catalogs and determine large earthquakes’ recurrence. For this assessment, we developed a parameter estimation technique for a probabilistic earthquake occurrence model that captures time and space interactions ...
- Bayesian analysis
- Earthquakes
- Faults
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Por | Aguilera, Felipe; Apaza, Fredy; Del Carpio Calienes, José Alberto; Grosse, Pablo; Jiménez, Néstor; Ureta, Gabriel ... (Springer, 2022-02-12)

Advances in scientific understanding of the Central Volcanic Zone of the Andes: a review of contributing factors

The Central Volcanic Zone of the Andes (CVZA) has been the focus of volcanological research for decades, becoming a very important site to understand a number of volcanic processes. Despite most of the research in the CVZA being carried out by foreign scientists, the last two decades have seen a ...
- Regional volcanology
- Monitoring networks
- Volcanological research
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