Article
Engineering, Geological
L. G. Brown
Summary: This paper explores the identification and quantification of seismic responses in mine seismicity, using four seismic response parameters to classify induced, complex, or triggered seismic events. These methods are applicable to various underground mining operations.
CANADIAN GEOTECHNICAL JOURNAL
(2021)
Article
Geochemistry & Geophysics
Mauricio Reyes Canales, German Rodriguez-Pradilla, Javad Yusifbayov, Mirko van der Baan
Summary: The study analyzed the induced seismicity related to hydraulic fracturing activities in the Duvernay Formation near Fox Creek, Alberta, Canada. It found that the seismic hazard has consistently decreased since 2015, with distinct features in Eastern and Western regions, while no seismic activity was observed in hydraulic fracturing areas. The decreasing seismic hazard may be associated with changes in fracturing operations and mitigation strategies, along with additional regulatory implementations to prevent significant seismic events.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geosciences, Multidisciplinary
G. Taylor, G. Hillers, T. A. T. Vuorinen
Summary: The study estimated vertical rotation rates for induced earthquakes, compared them with translational motion, and found deviations indicating heterogeneous seismic structure. Rotation method resolved site specific variations controlled by local geology, with apparent S wave speeds consistent with high propagation velocities in the study area.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Amy Sundermier, Rigobert Tibi, Ronald A. Brogan, Christopher J. Young
Summary: This study focuses on using waveform correlation analysis to automatically detect and identify mining blasts, reducing the workload for human analysts. The experiment evaluates the potential for establishing a set of standards for waveform correlation processing of mining blasts using data from two regions, and compares the results to the International Data Centre's Event Bulletin.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2022)
Article
Geochemistry & Geophysics
Mauricio Reyes Canales, Javad Yusifbayov, Mirko van der Baan
Summary: This study generates short-term seismic hazard maps for the province of Alberta, Canada, from 2011 through 2020, using the Monte Carlo simulation approach. The maps reveal spatio-temporal variations in earthquake recurrence parameters and provide a valuable tool for quantifying the short-term evolution in seismic hazard.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Wei Zhang, Jinghuai Gao, Zhaoqi Gao, Hongling Chen
Summary: The article presents a new approach to FWI based on adjoint-driven deep learning, using a fully convolutional network to achieve high-resolution inversion of subsurface velocity. It addresses the issues of ill-posedness, nonlinearity, and cycle-skipping that are common in traditional methods.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Geochemistry & Geophysics
Kai Xiong, David Lumley, Wei Zhou
Summary: The envelope full-waveform-inversion method has the potential to improve subsurface seismic velocity estimation and reduce inversion cycle skipping. However, challenges such as adjoint source and gradient instability make it less practical. We propose an improved envelope inversion method by adding a zero-frequency direct current bias term, which preserves all the information contained in the data residuals. Testing on realistic data shows the advantages of our method compared to conventional envelope inversion and full-waveform inversion methods.
Article
Geochemistry & Geophysics
Tong Zhou, Lingsen Meng, Ailin Zhang, Jean-Paul Ampuero
Summary: This study proposes a novel observational constraint on earthquake source size based on the decay rate of wavefield coherence across a seismic array. The results show that wavefield coherence decays faster for earthquakes of larger magnitudes. The source size can be estimated from the coherence decay rate, and the inferred source sizes are consistent with scaling relations intermediate between width-saturated L-models and quasi equi-dimensional rupture models. The study demonstrates the potential of utilizing waveform coherence to study earthquake source parameters.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Engineering, Geological
Giovanna Laurenzano, Marco Garbin, Stefano Parolai, Carla Barnaba, Marco Romanelli, Luca Froner
Summary: Site response analysis is crucial for seismic hazard and risk assessment as well as landuse planning. However, current regional site amplification models may not be precise enough for complex sites like alpine valleys. Limited recording of earthquakes due to the installation of seismological stations further limits the computation of site response. To address this, k-means cluster, correlation analysis, and Voronoi tessellation were used to expand the site response to a denser grid of points in the studied area. The findings provide valuable data for hazard and risk scenarios, and can contribute to improving regional maps at a local level.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Geological
Yaoqi Liu, Anye Cao, Changbin Wang, Xu Yang, Qiang Wang, Xianxi Bai
Summary: High-magnitude events (HMEs) in underground mines, such as rockbursts, can cause violent rock failures. This study aims to investigate the cluster properties of moment tensors (MTs) before HMEs and develop a prediction method. A seismic clustering method was proposed to analyze MTs and their decompositions. Results show that HMEs have different source mechanisms but are close in location. A refined cluster possibility index was proposed to identify abnormal risk zones, and a risk assessment index was developed to evaluate the degree of seismic event clusters. The study achieved a 60% accuracy in predicting HMEs.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Geochemistry & Geophysics
Yan Yang, Angela F. Gao, Kamyar Azizzadenesheli, Robert W. Clayton, Zachary E. Ross
Summary: Seismic waveform modeling is a powerful tool for understanding earth structure and earthquake rupture processes, but it is computationally expensive. This study introduces a machine learning method called neural operator to accelerate these calculations. The trained models can simulate full wavefields at a much faster speed, and can accurately simulate different velocity models, source locations, and mesh discretization than the training dataset. Additionally, this method enables convenient full-waveform inversion with automatic differentiation.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Geochemistry & Geophysics
Wei Zhang, Jinghuai Gao
Summary: This study proposes a data-driven deep-learning full-waveform inversion approach based on seismic migration images, which can efficiently reconstruct a high-resolution velocity model of the subsurface. It outperforms the conventional approach in terms of reconstruction accuracy and generalization ability.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geochemistry & Geophysics
Jian Zhang, Hui Sun, Gan Zhang, Xiaoyan Zhao
Summary: This study develops a data-driven method for elastic parameter prediction based on waveform formulation. It compensates for the limited training data by utilizing the reflectivity method to construct the training dataset, leading to improved accuracy in the inversion results.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geosciences, Multidisciplinary
Yueqiao Hu, Junlun Li, Haijiang Zhang
Summary: Full waveform inversion (FWI) provides higher resolution subsurface velocity models but is limited by source information and cycle skipping issue. We propose a novel method called Waveform Energy Focusing Tomography (WEFT) which directly back-propagates seismic records and updates velocity models by maximizing waveform energy. Compared to FWI, WEFT has lower nonlinearity and higher adaptability.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geochemistry & Geophysics
Jian Sun, Kristopher Innanen, Tianze Zhang, Daniel Trad
Summary: Full waveform inversion (FWI) is a state-of-the-art method for imaging subsurface structures and physical parameters with seismic data, but it faces challenges in implementation and use. The implicit full waveform inversion (IFWI) algorithm, designed with deep neural representations, shows improved convergence and the ability to capture high-resolution subsurface structures. Although uncertainty analysis is not fully solved, IFWI addresses it meaningfully by approximating Bayesian inference. Numerical experimentation suggests that IFWI has a strong capacity for generalization and is suitable for multi-scale joint geophysical inversion.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geosciences, Multidisciplinary
S. Ruiz, F. Aden-Antoniow, J. C. Baez, C. Otarola, B. Potin, F. del Campo, P. Poli, C. Flores, C. Satriano, F. Leyton, R. Madariaga, P. Bernard
GEOPHYSICAL RESEARCH LETTERS
(2017)
Article
Geochemistry & Geophysics
Sebastian Riquelme, Miguel Medina, Francisco Bravo, Sergio Barrientos, Jaime Campos, Armando Cisternas
SEISMOLOGICAL RESEARCH LETTERS
(2018)
Article
Geosciences, Multidisciplinary
B. Derode, J. Campos
GEOPHYSICAL RESEARCH LETTERS
(2019)
Article
Geochemistry & Geophysics
Benoit Derode, Bertrand Delouis, Jaime Campos
SEISMOLOGICAL RESEARCH LETTERS
(2019)
Article
Geochemistry & Geophysics
Francisco Bravo, Pablo Koch, Sebastian Riquelme, Mauricio Fuentes, Jaime Campos
SEISMOLOGICAL RESEARCH LETTERS
(2019)
Editorial Material
Geochemistry & Geophysics
Carlos A. Vargas, Susan L. Beck, Marino Protti, Jaime A. Campos
SEISMOLOGICAL RESEARCH LETTERS
(2019)
Article
Geochemistry & Geophysics
S. Riquelme, H. Schwarze, M. Fuentes, J. Campos
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2020)
Article
Geosciences, Multidisciplinary
Juliette Marin, Julian Cortes, Enrique Aliste, Jaime Campos
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2020)
Article
Geosciences, Multidisciplinary
Seth Saltiel, Tushar Mittal, Jorge G. F. Crempien, Jaime Campos
FRONTIERS IN EARTH SCIENCE
(2020)
Article
Multidisciplinary Sciences
Benoit Derode, Raul Madariaga, Jaime Campos
Summary: The study analyzed the source mechanism of the Maule earthquake in South America and the seismic activity before and after the main shock. Through a unique seismic comparison method, they identified the seismic activity pattern before the main shock and the changes in seismic rate after the main shock. The study concluded that the earthquake was the result of multiple preparation stages increasing the locking degree at the plate interface and exhibiting irregular seismic activity at different time scales.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Diego Salazar, Gabriel Easton, James Goff, Jean L. Guendon, Jose Gonzalez-Alfaro, Pedro Andrade, Ximena Villagran, Mauricio Fuentes, Tomas Leon, Manuel Abad, Tatiana Izquierdo, Ximena Power, Luca Sitzia, Gabriel Alvarez, Angelo Villalobos, Laura Olguin, Sebastian Yrarrazaval, Gabriel Gonzalez, Carola Flores, Cesar Borie, Victoria Castro, Jaime Campos
Summary: Early inhabitants in the Atacama Desert in northern Chile developed strategies to adapt to extreme environment, including earthquakes and tsunamis. Geoarchaeological evidence reveals a major tsunamigenic earthquake similar to 3800 years ago, suggesting the possibility of M-w similar to 9.5 tsunamigenic earthquakes in northern Chile.
Article
Geochemistry & Geophysics
Miguel Medina, Sebastian Riquelme, Mauricio Fuentes, Jaime Campos
Summary: The study shows that there is great variability in tsunami run-up distribution along the Nazca-South America subduction zone, with some of the most affected areas including Valparaiso in Chile and Lima in Peru. Vulnerability to tsunami run-up amplification was identified in 17 coastal locations, as well as instances of regional amplification due to tsunami directivity and coastal barriers. The conclusion is that tsunami hazard remains high along the coast of South America, even in areas where significant earthquakes have occurred recently.
PURE AND APPLIED GEOPHYSICS
(2021)
Article
Geochemistry & Geophysics
Mauricio Fuentes, Francisco Uribe, Sebastian Riquelme, Jaime Campos
Summary: Temporal parameters of the source, such as rise time and rupture velocity, play a crucial role in enhancing tsunami amplitudes and producing non-negligible shifts in arrival times. Amplification occurs when the rupture velocity matches the long-wave speed of the tsunami, and the static approximation corresponds to the limit case for relatively fast ruptures.
PURE AND APPLIED GEOPHYSICS
(2021)
Proceedings Paper
Computer Science, Information Systems
Hernan Sarmiento, Barbara Poblete, Jaime Campos
WEBSCI'18: PROCEEDINGS OF THE 10TH ACM CONFERENCE ON WEB SCIENCE
(2018)
Article
Geochemistry & Geophysics
M. Fuentes, S. Riquelme, J. Ruiz, J. Campos
PURE AND APPLIED GEOPHYSICS
(2018)
