Preprints
Search for earthquake (437 results)
WITHDRAWN: Earthquakes and Other Seismic Processes as Part of Impact Theory
Published: 2023-11-01
Subjects: Education, Engineering, Physical Sciences and Mathematics
Abstract removed when submission was withdrawn.
WITHDRAWN: The Energy of Earthquakes. What's Wrong with the Elastic Recoil Theory?
Published: 2023-11-01
Subjects: Education, Engineering, Physical Sciences and Mathematics
Abstract removed when submission was withdrawn.
WITHDRAWN: Thermonuclear Fusion as a Source of Seismic Phenomena?
Published: 2023-11-01
Subjects: Education, Engineering, Physical Sciences and Mathematics
Abstract removed when submission was withdrawn.
WITHDRAWN: The Quantum Mechanism of Earthquakes as Exemplified by a Sudden Ejection of Rocks and Gas from a Rock Mass during the Process of a Coulomb Explosion
Published: 2023-10-31
Subjects: Education, Physical Sciences and Mathematics
Abstract removed when submission was withdrawn.
Detection of Hidden Low-Frequency Earthquakes in Southern Vancouver Island with Deep Learning
Published: 2023-10-19
Subjects: Physical Sciences and Mathematics
Low-frequency earthquakes (LFEs) are small-magnitude earthquakes that are depleted in high-frequency content relative to traditional earthquakes of the same magnitude. These events occur in conjunction with slow slip events (SSEs) and can be used to infer the space and time evolution of SSEs. However, because LFEs have weak signals, and the methods used to identify them are computationally [...]
Climate- and Weather-Driven Solid-Earth Deformation and Seismicity
Published: 2023-10-10
Subjects: Physical Sciences and Mathematics
There is long-standing interest in the interactions between atmospheric and hydrological processes and solid Earth deformation, including the occurrence of earthquakes. Here, we review evidence for the effects of climatic processes and weather on deformation and seismicity in the lithosphere over a wide range of time scales, ranging from load cycles associated with the ice ages to the effects of [...]
Coral geochemical response to uplift in the aftermath of the 2005 Nias-Simeulue earthquake
Published: 2023-10-07
Subjects: Environmental Indicators and Impact Assessment, Geochemistry, Geomorphology, Natural Resources and Conservation, Tectonics and Structure
On 28 March 2005, the Indonesian islands of Nias and Simeulue experienced a powerful Mw 8.6 earthquake and widespread co-seismic uplift and subsidence. In areas of coastal uplift (up to ~2.8 m), fringing reef coral communities were killed by exposure, while deeper corals that survived were subjected to habitats with altered runoff, sediment and nutrient regimes. Here we present time-series [...]
Revisiting the 2015 Mw=8.3 Illapel earthquake: Unveiling complex fault slip properties using Bayesian inversion.
Published: 2023-10-02
Subjects: Physical Sciences and Mathematics
The 2015 moment magnitude Mw=8.3 Illapel earthquake is the largest mega-thrust earthquake that has been recorded along the Chilean subduction zone since the 2010 M_W=8.8 Maule earthquake. Previous studies indicate a rupture propagation from the hypocenter to shallower parts of the fault, with a maximum slip varying from 10 to 16 meters. The amount of shallow slip differs dramatically between [...]
Lower-Crustal Normal Faulting and Lithosphere Rheology in the Atlas Foreland
Published: 2023-10-02
Subjects: Physical Sciences and Mathematics
Earthquakes beneath the foreland basins of the Andes and Tibet follow a simple pattern, with normal-faulting events from 0--20 km depth and reverse-faulting events from 30--50 km depth. The switch in faulting style with depth suggests that the elastic stresses generated by flexure within these forelands are large enough to break faults, with opposite senses of horizontal strain either side of a [...]
The Holocene to Modern Fraser River Delta, Canada: Geological History, Processes, Deposits, and Natural Hazards
Published: 2023-10-01
Subjects: Physical Sciences and Mathematics
The Fraser River Delta (FRD) is a major sedimentary system and is home to one of Canada’s largest metropolitan areas, Metro Vancouver. It is also an ecologically important region that is culturally significant to several First Nations groups. In this review, we summarize the state of knowledge about the geological evolution of the FRD and link hydrodynamic processes with sedimentary products [...]
A Cascadia Slab Model from Receiver Functions
Published: 2023-09-08
Subjects: Earth Sciences, Geophysics and Seismology
We map the characteristic signature of the subducting Juan de Fuca and Gorda plates along the entire Cascadia forearc from northern Vancouver Island, Canada to Cape Mendocino in northern California, USA, using teleseismic receiver functions. The subducting oceanic crustal complex, possibly including subcreted material, is parameterized by three horizons capable of generating mode-converted waves: [...]
Garnet fracturing reveals ancient unstable slip events hosted in plate interface metasediments
Published: 2023-09-02
Subjects: Physical Sciences and Mathematics
A paradox exists between the great number of intermediate-depth earthquakes occurring along active subduction interfaces worldwide and the extreme scarcity of paleo-seismic events recorded in exhumed metasedimentary rocks from ancient subduction zones. Recrystallization, shearing as well as exhumation-related overprinting generally contribute to the nearly-complete erasing of markers of unstable [...]
Forecast of Earthquake Magnitude for North-West (NW) Indian Region Using Machine Learning Techniques
Published: 2023-08-24
Subjects: Geophysics and Seismology
Earthquakes have posed significant hazards to human lives and infrastructure for as far back as can be recalled. This paper presents a Machine Learning (ML) based approach for earthquake magnitude forecasting spatially using the earthquake clustering in five selected zones of NW Indian region. Previous research efforts have primarily relied on empirical relationships and statistical models, which [...]
A proxy implementation of thermal pressurization for earthquake cycle modeling on rate-and-state faults
Published: 2023-08-22
Subjects: Physical Sciences and Mathematics
The reduction of effective normal stress during earthquake slip due to thermal pressurization of fault pore fluids is a significant fault weakening mechanism. Explicit incorporation of this process into frictional fault models involves solving the diffusion equations for fluid pressure and temperature outside the fault at each time step, which significantly increases the computational complexity. [...]
An Overview of Seismic Activities in Ghana: A Systematic Review
Published: 2023-08-08
Subjects: Education, Physical Sciences and Mathematics
Seismic activities pose significant challenges to societies globally. Therefore, it is crucial to understand their occurrence, patterns, and impacts. By studying seismic activities, including earthquakes, researchers can investigate their occurrence, distribution, and characteristics which can provide effective management and risk reduction strategies. The southern part of Ghana is prone to [...]