Results 31 to 40 of about 76,495 (193)

Fiber-optic earthquake detection [PDF]

Science, 2017
Seismology The seismic networks used to detect earthquakes are limited spatially because they require expensive seismometers to be placed, monitored, and maintained. Lindsey et al. show how fiber optics can be used for seismic recording, using a technique known as distributed acoustic sensing (DAS). Three examples show how DAS can detect ground motions—
openaire   +1 more source

Investigating short-term earthquake precursors detection through monitoring of total electron content variation in ionosphere

Frontiers in Astronomy and Space Sciences, 2023
The effectiveness and accuracy of earthquake precursors are measured by the ability of the precursors to predict the time, epicentral distance, and magnitude of the earthquake for short-term earthquake prediction.
Nur Fatin Irdina Zulhamidi, Mardina Abdullah, Mardina Abdullah, Nurul Shazana Abdul Hamid, Nurul Shazana Abdul Hamid, Khairul Adib Yusof, Khairul Adib Yusof, Siti Aminah Bahari   +7 more
doaj   +1 more source

Earthquake multi-classification detection based velocity and displacement data filtering using machine learning algorithms

Scientific Reports, 2022
Earthquake is one of the natural disasters that have a big impact on society. Currently, there are many studies on earthquake detection. However, the vibrations that were detected by sensors were not only vibrations caused by the earthquake, but also ...
Muhammad Ary Murti, Rio Junior, Ali Najah Ahmed, Ahmed Elshafie   +3 more
doaj   +1 more source

Time-frequency representation of earthquake accelerograms and inelastic structural response records using the adaptive chirplet decomposition and empirical mode decomposition [PDF]

, 2007
In this paper, the adaptive chirplet decomposition combined with the Wigner-Ville transform and the empirical mode decomposition combined with the Hilbert transform are employed to process various non-stationary signals (strong ground motions and ...
A. Giaralis, Baraniuk, Boashash, Boashash, Burrus, Chen, Cohen, Flandrin, Gabor, Huang, Huang, Kijewski-Correa, Loh, Mallat, Mallat, Mann, N.P. Politis, Ohtori, Olhede, P.D. Spanos, Qian, Qian, Spanos, Spencer, Wang, Xu, Yan, Yang, Yin, Zhang, Zhang, Zhang   +31 more
core   +1 more source

CCFE: A Few-Shot Learning Model for Earthquake Detection and Phase Identification

IEEE Access, 2022
Earthquake detection and phase identification are fundamental and challenging tasks in observational seismology. Deep learning has achieved considerable progress in these two tasks.
Peng Zhao, Shao Yongqian, Xia Shian
doaj   +1 more source

Constraints on fault and lithosphere rheology from the coseismic slip and postseismic afterslip of the 2006 M_w 7.0 Mozambique earthquake [PDF]

, 2012
The 2006 M_w 7.0 Mozambique (Machaze) normal-faulting earthquake ruptured an unusually steeply dipping fault plane (~75°). The amount of slip in the earthquake decreased from depths of ~10 km toward the surface, and this shallow slip deficit was at least
Bergman, Eric, Copley, Alex, Hollingsworth, James   +2 more
core   +1 more source

Consecutive statistical evaluation framework for earthquake forecasting: Evaluating satellite surface temperature anomaly detection methods

Journal of Asian Earth Sciences: X, 2022
Short-term earthquake prediction remains a challenge. In this study, we investigated earthquake predictability using a consecutive statistical evaluation framework (CSEF).
Zhong-Hu Jiao, Xinjian Shan
doaj   +1 more source

Pattern Recognition for Earthquake Detection [PDF]

, 1987
The detector algorithms in use at date rely on negative decision logic: based on a model of the ambient noise process they detect all deviations, but many of them are false alarms. The principal alternative to this approach is pattern recognition, which tests on positive correlation with some known signal patterns.
openaire   +3 more sources

Synergistic combination of systems for structural health monitoring and earthquake early warning for structural health prognosis and diagnosis [PDF]

, 2012
Earthquake early warning (EEW) systems are currently operating nationwide in Japan and are in beta-testing in California. Such a system detects an earthquake initiation using online signals from a seismic sensor network and broadcasts a warning of the ...
Beck, James L., Wu, Stephen
core   +1 more source

GPS source solution of the 2004 Parkfield earthquake [PDF]

, 2014
We compute a series of finite-source parameter inversions of the fault rupture of the 2004 Parkfield earthquake based on 1 Hz GPS records only. We confirm that some of the co-seismic slip at shallow depth (
Dreger, D., Houlie, N., Kim, A.
core   +2 more sources