Preprints
Search for earthquake (435 results)
Transient aseismic vertical deformation across the Pisia-Skinos normal fault (Gulf of Corinth, Greece)
Published: 2024-01-18
Subjects: Earth Sciences, Geophysics and Seismology, Tectonics and Structure
Geodetically-derived deformation rates are sometimes used to infer seismic hazard, implicitly assuming that short-term (annual-decadal) deformation is representative of longer-term deformation. This is despite geological observations indicating that deformation/slip rates are variable over a range of timescales. Using geodetic data from 2016-2021, we observe an up to 7-fold increase in vertical [...]
The Effects of Characteristic Slip Distance on Earthquake Nucleation Styles in Fully Dynamic Seismic Cycle Simulations
Published: 2024-01-17
Subjects: Earth Sciences, Geophysics and Seismology
Earthquake nucleation is a crucial preparation process of the following coseismic rupture propagation. Under the framework of rate-and-state friction (RSF), it was found that the ratios of a to b parameters control whether earthquakes nucleate as an expanding crack or a fixed length. However, the characteristic slip distance DRS controls the weakening efficiency of fault strength and can [...]
Fast relocking and afterslip-seismicity evolution following the 2015 Mw 8.3 Illapel earthquake in Chile
Published: 2024-01-16
Subjects: Physical Sciences and Mathematics
Large subduction earthquakes induce complex postseismic deformation, primarily driven by afterslip and viscoelastic relaxation, in addition to interplate relocking processes. However, these signals are intricately intertwined, posing challenges in determining the timing and nature of relocking. Here, we use six years of continuous GNSS measurements (2015-2021) to study the spatio-temporal [...]
B-value variations in the Central Chile seismic gap assessed by a Bayesian transdimensional approach
Published: 2024-01-16
Subjects: Physical Sciences and Mathematics
The b-value can be used to characterize the seismic activity for a given earthquake catalog and provide information on the stress level accumulated at active faults. Here we develop an algorithm to objectively estimate variations of b-value along one arbitrary dimension. To this end, we employ a Bayesian transdimensional approach where the seismic domains will be self-defined according to [...]
The Northern Chile forearc constrained by 15 years of permanent seismic monitoring
Published: 2024-01-12
Subjects: Physical Sciences and Mathematics
In this review article, we compile seismological observations from the different constituent parts of the Northern Chile forearc: the downgoing Nazca Plate, the plate interface, the upper South American Plate as well as the mantle wedge beneath it. As Northern Chile has been monitored by a network of permanent seismic stations since late 2006, there is a wealth of observations that enables us to [...]
Megathrust locking encoded in subduction landscapes
Published: 2024-01-05
Subjects: Physical Sciences and Mathematics
Locked areas of subduction megathrusts are increasingly found to coincide with landscape features sculpted over hundreds of kyrs, yet the mechanisms that underlie such correlations remain elusive. We show that interseismic locking gradients induce increments of irreversible strain across the overriding plate manifested predominantly as distributed seismicity. Summing these increments over [...]
A shake and a surge: Assessing the possibility of an earthquake-triggered eruption at Steamboat Geyser
Published: 2024-01-03
Subjects: Earth Sciences, Physical Sciences and Mathematics, Volcanology
When and why earthquakes trigger the eruption of magma, mud, and water remain unclear. On 18 September 2022, Steamboat Geyser in Yellowstone, USA erupted 8.25 hours after a local M3.9 earthquake. The distribution of Steamboat eruption intervals suggests a low probability of erupting so soon after the earthquake by chance. A seismometer 340 m from Steamboat recorded seismic waves with a peak [...]
Investigation of Liquefaction Potential in Sands Mixed with Gravel
Published: 2023-12-21
Subjects: Engineering
Liquefaction is one of the significant hazards associated with earthquakes. It was previously believed to occur mostly in clean sands; however, recent research has shown that liquefaction can occur in specific conditions in sands mixed with fine or coarse particles. Numerous studies have been conducted on clean sand, while limited research has focused on sands mixed with silt. Nevertheless, the [...]
Shortening and extrusion in the East Anatolian Plateau: how was Neogene Arabia-Europe convergence tectonically accommodated?
Published: 2023-12-21
Subjects: Physical Sciences and Mathematics
Deformation in orogenic belts is typically widely distributed, but may localized to form discrete, fast-moving fault zones enclosing semi-rigid microplates such as the Anatolian microplate. This plate is extruding westwards from the East Anatolian Plateau in the Arabia-Eurasia collision zone along major North and East Anatolian Faults that cause devastating earthquakes, including the February 6, [...]
Potential Volcanic Origin of the 2023 short-period Tsunami in the Izu Islands, Japan
Published: 2023-11-29
Subjects: Physical Sciences and Mathematics
On October 8, 2023, at 21:40 UTC (6:40 on October 9 local time), a tsunami warning was declared for the Izu Islands and southwest Japan. This tsunami was initially considered to be associated with the M4.9 earthquake at 20:25 UTC (5:25 JST). However, we know events of this magnitude are far too small to generate observed tsunamis from coseismic deformation alone. In this study, we analyzed the [...]
Deep Learning for Deep Earthquakes: Insights from OBS Observations of the Tonga Subduction Zone
Published: 2023-11-06
Subjects: Earth Sciences, Geophysics and Seismology, Physical Sciences and Mathematics
Applications of machine learning in seismology have greatly improved our capability of detecting earthquakes in large seismic data archives. Most of these efforts have been focused on continental shallow earthquakes, but here we introduce an integrated deep-learning-based workflow to detect deep earthquakes recorded by a temporary array of ocean-bottom seismographs (OBSs) and land-based stations [...]
WITHDRAWN: Magma as a generator of plasma and thermonuclear reactions in the bowels of the Earth?
Published: 2023-11-03
Subjects: Education, Engineering, Physical Sciences and Mathematics
Abstract removed when submission was withdrawn.
WITHDRAWN: Seismology for Dummies
Published: 2023-11-03
Subjects: Education, Engineering, Physical Sciences and Mathematics
Abstract removed when submission was withdrawn.
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.