Preprints
Search for earthquake (603 results)
On the Origin of Slow and Large Earthquakes in South-Central Mexico
Published: 2025-08-06
Subjects: Earth Sciences
Slow slip events (SSEs) in Guerrero and Oaxaca, Mexico, have likely triggered five of the last six M7+ earthquakes in the region since 2012. This interaction, however, is non-systematic, as evidenced by the preceding 17 years of large earthquake quiescence, when multiple SSEs occurred without consequence. The Mexican catalog since 1800 reveals that large earthquakes cluster in time every ~15 [...]
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 [...]
Slow Slip Events in Mexico: A Historical Perspective
Published: 2025-08-01
Subjects: Physical Sciences and Mathematics
This paper introduces a historical catalogue of slow slip events (SSE) for the Mexican subduction zone. The catalogue incorporates all 25 SSEs recorded since they were discovered in 1997. The inversion of GPS data for ten SSEs in Guerrero and five in Oaxaca reveals a clear slow slip segmentation along the Middle America Trench, with slip maxima between 30 and 40 km depth in both regions. SSEs in [...]
Paleoseismology of the Zougahana fault, northern Aso outer rim, and its role in the tectonics of northern Kyushu
Published: 2025-07-31
Subjects: Geomorphology, Tectonics and Structure
The Kumamoto earthquake (Mj 6.5, Mj 7.3) occurred on 14 and 16 April 2016, with the epicenter on the Futagawa and Hinagu faults, central Kyushu Island, southwest Japan. Differential interferometric synthetic aperture radar analyses detected many phase discontinuities in the source region. Phase discontinuities and ruptures were also confirmed at the Zougahana fault on the northeastern rim of Aso [...]
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 [...]
Reduced-order modelling of Cascadia’s slow slip cycles
Published: 2025-07-25
Subjects: Computer Sciences, Earth Sciences, Numerical Analysis and Scientific Computing, Physical Sciences and Mathematics
Slow-slip events (SSEs) modulate the earthquake cycle in subduction zones, yet understanding their physics remains challenging due to sparse observations and high computational cost of physics-based simulations. We present a scientific machine-learning approach using a data-driven reduced-order modelling (ROM) framework to efficiently simulate the SSE cycle governed by rate-and-state friction in [...]
Slowly migrating fracture swarms in an actively serpentinizing borehole
Published: 2025-07-24
Subjects: Earth Sciences, Physical Sciences and Mathematics
Peridotite rocks are primary targets for engineered geological carbon sequestration efforts because they accommodate transfer carbon from aqueous fluids to rock during alteration reactions. Sequestration efforts must necessarily open fractures in the rocks surrounding a pumped borehole, but the current understanding of fracture growth during serpentinization of peridotite is limited to [...]
Data Assimilation in Machine-Learned Reduced-order Model of Chaotic Earthquake Sequences
Published: 2025-07-22
Subjects: Applied Mathematics, Earth Sciences, Physical Sciences and Mathematics
Realistic models of earthquake sequences can be simulated by assuming faults governed by rate-and-state friction embedded in an elastic medium. Exploring the possibility of using such models for earthquake forecasting is challenging due to the difficulty of integrating Partial Differential Equation (PDE) models with sparse, low-resolution observational data. This paper presents a [...]
Integrated Disaster Nursing Response for Public Healthcare Settings in Pakistan: A Sequential Mixed Method Approach Study Protocol
Published: 2025-07-12
Subjects: Public Health
Abstract Background Natural disasters such as floods, earthquakes, and hurricanes pose significant threats to human lives and infrastructure, particularly in low-lying regions of Pakistan. Among the most vulnerable areas are Sanghar and Dadu in the Sindh province, which experience recurrent flooding. These disasters often overwhelm healthcare systems and underscore the urgent need for adequately [...]
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 [...]
A SEISMIC MOMENT MAGNITUDE SCALE
Published: 2025-06-24
Subjects: Engineering, Physical Sciences and Mathematics
Theaimofobtaininga single scale for earthquake magnitudes has led many studies in the past to either develop relationships among various existing scales or develop an altogether new scale to represent a wide range of magnitudes on a single scale. Although a reliable and standardized estimation of earthquake size is a basic requirement for all tectonophysical and engineering applications, [...]
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 [...]
Hellenic Arc tsunami generation from Mw8+ 3D margin-wide dynamic rupture earthquake scenarios
Published: 2025-06-16
Subjects: Geophysics and Seismology
The Hellenic Arc subduction zone is the most seismically active region in the Mediterranean, capable of generating large earthquakes and tsunami. Given the proximity of densely populated coastlines, understanding the characteristics of potential future large tsunamigenic earthquakes is crucial for assessing tsunami hazard. We present non-linear shallow water tsunami simulations sourced from the [...]
Limitations of Mw and M Scales: Compelling Evidence Advocating for the Das Magnitude Scale (Mwg)—A Critical Review and Analysis
Published: 2025-06-12
Subjects: Engineering, Physical Sciences and Mathematics
Abstract Precise determination of earthquake size is cru cial for various geoscientific and engineering applications. The Moment Magnitude (Mw) scale, introduced by Kan amori in 1977, was a significant advancement. Kanamori (1977) advocated use of Mw for large earthquakes (≥ 7.5). (Hanks and Kanamori in J. Geophys. Res. 84:2348–2350) later extended the Mw scale named as M scale by [...]