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Rapid earthquake magnitude estimation is crucial for effective early warning systems that can save lives and reduce economic damage. In this paper, we present a comprehensive study of magnitude classification using only the vertical…

The upper bound earthquake magnitude (maximum possible magnitude) of a truncated Gutenberg-Richter relation is the right truncation point (right end-point) of a truncated exponential distribution and is important in the probabilistic…

地球物理 · 物理学 2018-07-30 Mathias Raschke

Earthquake catalog declustering is the procedure of separating event clusters from background seismicity, which is an important task in statistical seismology, earthquake forecasting, and probabilistic seismic hazard analysis. Several…

地球物理 · 物理学 2025-04-14 Robert Shcherbakov , Sidhanth Kothari

The existence of magnitude dependence in earthquake triggering has been reported. Such a correlation is linked to the issue of seismic predictability and remains under intense debate whether it is physical or is caused by incomplete data…

地球物理 · 物理学 2023-07-06 Giuseppe Petrillo , Jiancang Zhuang

Geoscience and seismology have utilized the most advanced technologies and equipment to monitor seismic events globally from the past few decades. With the enormous amount of data, modern GPU-powered deep learning presents a promising…

地球物理 · 物理学 2021-09-14 Bo Feng , Geoffrey C. Fox

Machine learning (ML) catalogs contain many more earthquakes than routine catalogs, but their performance in phase picking and earthquake detection has not been fully evaluated. We develop station-level detection probabilities using…

地球物理 · 物理学 2026-02-11 Jaehong Chung , Yifan Yu , Lauro Chiaraluce , Maddalena Michele , Gregory C. Beroza

Previous papers have outlined nowcasting methods to track the current state of earthquake hazard using only observed seismic catalogs. The basis for one of these methods, the "counting method", is the Gutenberg-Richter (GR)…

地球物理 · 物理学 2025-10-20 John B Rundle , Ian Baughman , Andrea Donnellan , Lisa Grant , Geoffrey Fox

Without rigorous attention to the completeness of earthquake catalogs, claims of new discoveries or forecasting skills cannot be deemed credible. Therefore, estimating the completeness magnitude (Mc) is a critical step. Among various…

地球物理 · 物理学 2025-09-12 Xinyi Wang , Jiawei Li , Ao Feng , Didier Sornette

The recent evolution of induced seismicity in Central United States calls for exhaustive catalogs to improve seismic hazard assessment. Over the last decades, the volume of seismic data has increased exponentially, creating a need for…

地球物理 · 物理学 2017-02-08 Thibaut Perol , Michaël Gharbi , Marine Denolle

The idea of the global daily magnitude (GDM, unit designation is Mg) of earthquakes is introduced. The formula is given for calculating Mg from earthquake strength data, characterized by the classic magnitude M on the Richter scale. An…

地球物理 · 物理学 2019-09-04 A. V. Guglielmi , B. I. Klain

Forecasting earthquake sequences remains a central challenge in seismology, particularly under non-stationary conditions. While deep learning models have shown promise, their ability to generalize across time remains poorly understood. We…

Based on the geodynamics, an earthquake does not take place until the momentum-energy excess a faulting threshold value of rock due to the movement of the fluid layer under the rock layer and the transport and accumulation of the momentum.…

综合物理 · 物理学 2008-02-05 Yi-Fang Chang

Machine learning is becoming increasingly important in scientific and technological progress, due to its ability to create models that describe complex data and generalize well. The wealth of publicly-available seismic data nowadays…

地球物理 · 物理学 2020-08-10 Fabrizio Magrini , Dario Jozinović , Fabio Cammarano , Alberto Michelini , Lapo Boschi

In this study we develop a single-station deep-learning approach for fast and reliable estimation of earthquake magnitude directly from raw waveforms. We design a regressor composed of convolutional and recurrent neural networks that is not…

地球物理 · 物理学 2020-02-05 S. Mostafa Mousavi , Gregory C. Beroza

It is shown that earthquakes do not know how large they will become, at least from the information collected at seismic catalogs. In other words, the magnitude is independent on previous magnitudes as well as on the waiting time between…

其他凝聚态物理 · 物理学 2009-11-10 Alvaro Corral

This paper presents a new technical method for computing calendar time forecasts in a local area for large earthquakes of a target magnitude MT using a count small earthquakes MS < MT in the area, together with the Gutenberg-Richter (GR)…

Terra Seismic can predict most major earthquakes (M6.2 or greater) at least 2 - 5 months before they will strike. Global earthquake prediction is based on determinations of the stressed areas that will start to behave abnormally before…

地球物理 · 物理学 2020-03-18 Oleg Elshin , Andrew A. Tronin

This paper focuses on the problem of anticipating the local occurrence of future large earthquakes. "Local" is defined as the probability of a large earthquake occurring with a defined circle of arbitrary radius surrounding a point of…

Reliable earthquake detection and seismic phase classification is often challenging especially in the circumstances of low magnitude events or poor signal-to-noise ratio. With improved seismometers and better global coverage, a sharp…

地球物理 · 物理学 2022-04-07 Wei Li , Yu Sha , Kai Zhou , Johannes Faber , Georg Ruempker , Horst Stoecker , Nishtha Srivastava

This study describes a deep convolutional neural network (CNN) based technique for the prediction of intensity measurements (IMs) of ground shaking. The input data to the CNN model consists of multistation 3C broadband and accelerometric…

地球物理 · 物理学 2021-05-13 Dario Jozinović , Anthony Lomax , Ivan Štajduhar , Alberto Michelini