Results 211 to 220 of about 17,263 (255)
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Diversity of deep earthquakes with waveform similarity
Physics of the Earth and Planetary Interiors, 2021Abstract The generation mechanism of deep earthquakes in subducting slabs remains enigmatic. We analyze deep earthquakes at depths of 200-500 km in the Pacific Plate beneath central Japan, then identify five groups of 11 similar earthquakes whose waveforms are similar at five or more stations over a 40 s time window that includes the P and S arrivals.
Ayako Tsuchiyama, Junichi Nakajima
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Functional Linear Models for the Analysis of Similarity of Waveforms
2023In seismology methods based on waveform similarity analysis are adopted to identify sequences of events characterized by similar fault mechanism and propagation pattern. Seismic waves can be considered as spatially interdependent, three dimensional curves depending on time and the waveform similarity analysis can be configured as a functional ...
Di Salvo, Francesca +2 more
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Assessment of waveform similarity in youth long-distance runners
Gait & Posture, 2020Although unimpaired gait is typically assumed to be symmetrical, side-to-side differences in discrete instances of time have been reported in adult and youth runners. These previous results fail to account for the entirety of the motion.Are waveform pattern similarities strong in youth long-distance runners and are the waveform pattern similarities ...
Micah C, Garcia +3 more
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A Waveform Similarity Approach to Investigate Seismicity Patterns
Natural Hazards, 1999the temporal and spatial evolution of seismicity, a simple cross-correlation technique was applied to a waveform data set of western Alps earthquakes. A selection of events recorded by a reference station of the regional seismic network of North-Western Italy (IGG network) within a particular S-P range was used.
CATTANEO M +3 more
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A note on the similarity of certain atmospherics waveforms
Journal of the Franklin Institute, 1951Abstract This note reports a remarkable uniformity observed among waveforms of atmospherics associated with a common center of thunderstorm activity. Photographic results of observations during the day and night are reported. From 104 nighttime waveforms identifiable with a surface cold front extending over the mid-western states, 55 per cent are ...
W.F. Zetrouer, W.J. Kessler
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A Waveform Similarity Approach for Diagnosing Nonlinear Behavior of Vibratory Systems
International Journal of Structural Stability and Dynamics, 2020A new approach is proposed for diagnosing the nonlinear characteristics of vibratory systems in engineering applications. The correlation coefficient of two periods’ response wave is used in this approach and a new concept named similarity degree of waveform (SDW) is proposed to describe the correlations of the responses and therefore the ...
Qian, Changzhao, Chen, Changping
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Waveform similarity analysis at Cotton Valley, Texas
SEG Technical Program Expanded Abstracts 2011, 2011To analyze similarity of microseismic events independently from their locations we introduce two new measures, a composite Correlation Measure (CM) and a composite Time Measure (TM), which are based on waveforms and arrival times, only. To create a robust data base to test those measures, we study the quality of seismic traces and apply a simple step ...
Karsten Stuermer +2 more
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Earthquake relative location based on waveform similarity
Tectonophysics, 1994Abstract Knowledge of the precise location of aftershocks is a tool used to obtain a detailed image of the geometry of some characteristics of focal regions. In the case of sparse arrays of stations, the use of secondary phases such as S waves may provide strong constraints on the spatial coordinates of the solutions.
J. Mezcua, J. Rueda
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Improved Reservoir Characterization - The Use of Waveform Similarities
Proceedings, 2014The monitoring of microseismicity has already proven to be a very important tool to assess the quality of a geothermal or hydorcarbon reservoir or to estimate the risk of larger, to be felt, earthquakes in the vicinity of geothermal wells or in natural tectonic settings. We will show in this paper, how the use of waveform similarity, i.e.
J. Wassermann, T. Megies
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Study on power factor through the similarity of waveform
2008 3rd IEEE Conference on Industrial Electronics and Applications, 2008With the rapid development of electric electronic technology, non-linear loads, large capacity converters, etc. increase mostly, which brings about the serious problems such as harmonics. Thus, the traditional power theory based on the average is unable to meet with the practical require.
L.X. Zhou +4 more
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