Preprints
Filtering by Subject: Geophysics and Seismology
Analysis of geomagnetic secular variation for the last 1.5 Ma recorded by volcanic rocks of the Trans Mexican Volcanic Belt: new data from Sierra de Chichinautzin, Mexico
Published: 2025-08-08
Subjects: Earth Sciences, Geophysics and Seismology
The great wealth of volcanism along the Trans Mexican Volcanic Belt (TMVB) and the need to improve the secular variation curve of the Earth magnetic field of the region is the aim of this research. 300 oriented cores from 33 sites and 21 individual cooling units were acquired from Sierra de Chichinautzin volcanic field (ChVF) and Sierra de Santa Catarina (SSC). Directional analysis and rock [...]
Geomodelling of multi-scenario non-stationary reservoirs with enhanced GANSim
Published: 2025-08-05
Subjects: Artificial Intelligence and Robotics, Civil and Environmental Engineering, Earth Sciences, Engineering, Geology, Geophysics and Seismology, Hydrology, Mining Engineering, Natural Resources and Conservation, Natural Resources Management and Policy, Oil, Gas, and Energy, Sedimentology, Stratigraphy
Reservoir geomodelling is critical for groundwater management, CO₂ storage, geothermal exploitation, and hydrocarbon exploration, yet traditional geostatistical methods like multiple-point statistics (MPS) struggle with simulating complex geological patterns. GANSim, a Generative Adversarial Networks-based geomodelling method, has proven effective for single-scenario stationary reservoirs, but [...]
Comparisons of tsunami inundation between homogeneous and heterogeneous earthquake sources at select sites for the Cascadia Subduction Zone.
Published: 2025-08-05
Subjects: Geophysics and Seismology
Tsunami hazard severity — especially tsunami inundation depth — is related to the tsunami’s source mechanism. Traditionally, homogeneous earthquake rupture sources have been used as the source mechanism for tsunamis generated in the Cascadia Subduction Zone for re- gional hazard assessment. We show with 200 heterogeneous earthquake rupture sources how tsunami inundation hazards change for three [...]
Exploration of Gold, Copper, Magnetite, Hematite, Manganese, Magnesium, Chromite, Antimony, Bauxite, Industrial soils, Nickel, Cobalt, Lead, Lithium minerals using Landsat8 satellite
Published: 2025-07-31
Subjects: Environmental Education, Environmental Health and Protection, Environmental Monitoring, Geophysics and Seismology, Mineral Physics, Natural Resource Economics, Natural Resources and Conservation, Natural Resources Management and Policy, Other Earth Sciences, Other Environmental Sciences
In this study, we provided an accurate and complete method for exploration and analysis of Gold, Copper, Magnetite, Hematite, Manganese, Magnesium, Chromite, Antimony, Bauxite, Industrial soils, Nickel, Cobalt, Lead and Lithium minerals in the desired area. Mineral exploration can be done using the seven bands from Landsat8 satellite images, through combination of different maps, a specific color [...]
QuakeMigrate: a Python Package for Automatic Earthquake Detection and Location Using Waveform Migration and Stacking
Published: 2025-07-25
Subjects: Geophysics and Seismology, Glaciology, Volcanology
QuakeMigrate is a modular, open-source Python package providing a framework to efficiently and automatically detect and locate microseismicity. From raw seismic waveforms and a modest number of physically meaningful inputs and tuneable parameters, it produces catalogues of earthquakes including hypocentres, their associated uncertainties, phase arrival times, and local magnitude estimates, all of [...]
Shear localization as a key control on mass-transport complexes seal integrity: insights from geophysical datasets
Published: 2025-07-24
Subjects: Earth Sciences, Geology, Geophysics and Seismology, Sedimentology
Mass-transport complexes (MTCs), existing in all sedimentary basins worldwide, can serve as effective seals for hydrocarbons and carbon dioxide storage due to shear-induced overcompaction. However, localized seal failure is occasionally observed in specific part of the MTCs, leading to hydrocarbon and carbon dioxide leakage and posing potential threats to seabed stability. Due to the scarcity of [...]
Assessing uncertainty of source rock properties using Monte Carlo basin modeling – Application to Canning Basin, Australia
Published: 2025-07-23
Subjects: Applied Statistics, Earth Sciences, Engineering, Environmental Sciences, Geochemistry, Geology, Geophysics and Seismology, Oil, Gas, and Energy, Physical Sciences and Mathematics, Risk Analysis, Statistics and Probability, Stratigraphy
This study presents a Monte Carlo basin modeling framework for quantifying uncertainty in source rock property predictions by integrating geological, geophysical, and geochemical inputs. The approach accounts for variability in petrological parameters from rock physics inversion, paleo-erosion magnitudes, organic facies properties, and boundary conditions to simulate source rock properties such [...]
Statistical rock physics inversion for assessing source rock properties from seismic signatures: an application to the Canning Basin, Australia
Published: 2025-07-15
Subjects: Applied Statistics, Earth Sciences, Geology, Geophysics and Seismology, Physical Sciences and Mathematics, Statistics and Probability
Quantifying petrophysical properties and potentials of source rocks is important for subsurface modeling and characterization. However, predicting these properties using seismic signatures and well-log information is a high-dimensional, nonlinear inverse problem, and is subject to uncertainty due to data ambiguities. In this study, a statistical rock physics inversion workflow is proposed to [...]
Deglaciation history and relative sea level changes since the Last Glacial Maximum in the southern Gulf of St. Lawrence, Canada
Published: 2025-07-10
Subjects: Earth Sciences, Geology, Geophysics and Seismology, Sedimentology, Stratigraphy
During the last glacial period, continents and surrounding shelves in high latitude regions of the Northern Hemisphere were covered by ice sheets. Their retreat during the late Pleistocene and Holocene resulted in isostatic adjustments of the previously glaciated landmass, which influenced post-glacial changes in relative sea level (RSL). Many questions, however, remain about the timing and [...]
Assessing the impact of automatically derived depth phases on the determination of earthquake hypocentres – application to the South America subduction zone
Published: 2025-07-07
Subjects: Geophysics and Seismology
Accurate earthquake hypocentres are fundamental to a wide range of geophysical studies, yet source depth remains poorly constrained in teleseismic earthquake catalogues. Near source surface reflections such as pP, sP, and sS (known as depth phases) provide critical information for resolving hypocentral depth, particularly for intermediate-depth earthquakes. The number of depth phases reported by [...]
A quasi-real-time system for automatic local event monitoring in Germany
Published: 2025-07-07
Subjects: Geophysics and Seismology
We present TieBeNN, a wrapper that integrates open-source, state-of-the-art seismic monitoring tools, including advanced machine learning--based approaches, to enhance the German Federal Seismological Survey’s (EdB) automatic real-time earthquake monitoring system. TieBeNN extends the existing workflow by adding automatic, probabilistic focal depth estimation using NonLinLoc and introduces a [...]
Generative geomodelling: Deep Learning vs. Geostatistics
Published: 2025-06-20
Subjects: Geology, Geophysics and Seismology, Hydrology, Sedimentology, Stratigraphy
Generative geomodelling aims to simulate subsurface facies distributions while honoring multiple types of conditioning data and geological knowledge. This study selects three typical multiple-point statistics (MPS) approaches—Direct Sampling (DS), Quick Sampling (QS), and SNESIM—and two Generative Adversarial Network (GAN) workflows—post-GANs perturbation and GANSim—as representatives to compare [...]
Deformation, Strains and Velocities for the Alpine Himalayan Belt from trans-continental Sentinel-1 InSAR & GNSS
Published: 2025-06-19
Subjects: Geophysics and Seismology, Tectonics and Structure
Surface velocities and strain rates from satellite geodesy have become essential tools for understanding the distribution of tectonic deformation, faulting and seismic hazard. However, across large regions of distributed continental deformation, such as the Alpine-Himalayan Belt, data are only sparsely available. While previous studies have mainly used spatially sparse GNSS to measure deformation [...]
Local Seismicity: Matched Filter Detection Routine with Synthetic Templates using 1D velocity model
Published: 2025-06-19
Subjects: Geophysics and Seismology
This study evaluates the performance of Synthetic Template Matching for seismic event detection in the West Bohemia region (Czechia), comparing it with two established methods: the automated detector-locator PEPiN and an Artificial Neural Network. Synthetic templates are generated using a 1D velocity model and span a grid of five fundamental focal mechanisms (FMs), independent of any prior [...]
Curved fault slip captured by CCTV video during the 2025 Mw 7.7 Mandalay earthquake
Published: 2025-06-16
Subjects: Geophysics and Seismology
On-fault geological observations from surface breaking earthquakes typically contain curved slickenlines, suggesting fault slip is curved. However, slickenlines commonly record only a fraction of coseismic slip, making it difficult to reconstruct the full slip trajectory. Near-fault seismic records, though capable of capturing ground motions associated with rupture, are limited in their ability [...]