Results 11 to 20 of about 119,173 (294)
AtmosphereLow-Frequency Time Code time service technology, as an important means of ground-based radio time dissemination, can be divided into ground wave zone and sky wave zone according to different receiving and transmitting distances.
Fan Zhao +9 more
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Overview of worldwide earthquake disasters in 2020
地震科学进展, 2021 Based on the earthquake disaster data collected worldwide，this paper sorts out the global seismic activity and disasters in 2020. Plotting the global earthquake disaster curves in recent 20 years and distribution map of hazard earthquakes in 2020，and ...
Geng Qian, Wei Feng
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Low‐frequency earthquakes in the Mexican Sweet Spot [PDF]
Geophysical Research Letters, 2013 AbstractWe use data from the Meso‐America Subduction Experiment to detect and locate low‐frequency earthquakes (LFEs) in the Mexican subduction zone. We use visually‐identified templates to perform a network waveform correlation search that produced ~17,000 robustly detected LFEs that form 15 distinct families.
Frank, William B. +6 more
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地震科学进展, 2021 This paper analyzes the data of Hebei digital seismographic stations Chengde, Laiyuan, Luanxian, Jingtanggang and Qianxi before the Tangshan M5.1 earthquake in 2020.
Jiaqi Wang +3 more
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EARTHQUAKE PREDICTION EVALUATION BASED ON VLF DATA USING A NOVEL INTERSECTION-UNION METHOD [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021 Electromagnetic phenomena, especially those in the Very Low Frequency/Low Frequency (VLF/LF) bands are promising for short-term earthquake prediction. Seismo-ionospheric perturbations cause a variety of changes in different receiver-transmitter VLF/LF ...
W. Barghi +5 more
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Modeling Low‐Frequency Earthquake Recurrence Patterns [PDF]
Geophysical Research Letters, 2017 AbstractTectonic tremor and low‐frequency earthquakes (LFE) have been identified globally, but the physical mechanisms responsible for different types of LFE recurrence patterns are still elusive. Here we use a brittle ductile friction model to study the frictional conditions leading to different LFE recurrence patterns observed in central California ...
Chunquan Wu, Eric G. Daub
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Applied Sciences, 2021 In this article, the phenomenon of low-frequency abnormal signals before earthquakes, which reflects the three elements of earthquakes and the beneath structure change information, is discussed.
Shasha Liang, Haibin Li
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Scaling of Repeating Earthquakes at the Transition From Aseismic to Seismic Slip
Geophysical Research Letters, 2023 Some observations of repeating earthquakes show an unusual, non‐self‐similar scaling between seismic moment and corner frequency, a source property related to rupture size.
O. Lengliné +2 more
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Moment-duration scaling of Low-Frequency Earthquakes in Guerrero, Mexico [PDF]
Journal of Geophysical Research: Solid Earth, 2020 Abstract Low‐frequency earthquakes (LFEs) are detected within tremor, as small, repetitive, impulsive low‐frequency (1–8 Hz) signals. While the mechanism causing this depletion of the high‐frequency content of their signal is still debated, this feature may indicate that the source processes at the origin of LFEs ...
Farge, Gaspard +2 more
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The Doppler effect induced by earthquakes: A case study of the Wenchuan MS8.0 earthquake
Geodesy and Geodynamics, 2022 Seismologists have found that the first arrival frequencies of P waves at different seismic stations have different widths, that is, different periods or frequencies, and they think that this phenomenon can be used to identify whether a Doppler effect is
Qicheng Li +3 more
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