Results 261 to 270 of about 30,612,164 (294)

Local b-values related to seismicity

Tectonophysics, 1974
Abstract To find a method by which the Caracas earthquake of July 29, 1967 could have been foreseen, a total of thirteen years of continuous seismographic records, recorded at the Seismological Institute Caracas (CAR), have been used to summarize the local seismic activity, in function of time and magnitude.
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Imaging b -value depth variations within the Cocos and Rivera plates at the Mexican subduction zone

Tectonophysics, 2018
By a systematic mapping of the b-value along profiles perpendicular to the Mexican Wadati-Benioff zone, we obtained important characteristics pertaining the stress state and faulting style related to the subduction process.
Q. Rodríguez-Pérez, F. Zúñiga
semanticscholar   +1 more source

Seismic magnitudes, entropy and b-value

Acta Geophysica
How seismic magnitudes are distributed is important for estimating stress levels in seismic hazard studies, and two methods of characterizing the magnitude distribution are through the Gutenberg-Richter b-value, or equivalently through , and through the information entropy.
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Complexity of Hydraulic Fractures – The B-value

72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010, 2010
The distribution of moment magnitudes for a hydraulic fracture treatment is related to the complexity of the fracture network through the slope of the frequency-magnitude distribution, known as the b-value. Characterizing this complexity relates to effective field drainage and can be used to calibrate predictions of fracture-mechanical models. As the b-
A. M. Baig, T. I. Urbancic, S. Bowman
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Relation Between Elastic Heterogeneity, Stress and the Gutenberg Richter b-value: A b-value Estimation using Sonic Logs

Proceedings, 2013
In this paper we establish relations between the fractal distribution of elastic parameters, stress field variations and the Gutenberg-Richter b-value of earthquakes. We extract information about elastic parameter distribution from sonic well logs to create an elastically heterogeneous 3D random medium with a fractal spatial correlation function. Using
C. Langenbruch, S.A. Shapiro
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High-B-Value Diffusion-Weighted MRI in Colorectal Cancer

American Journal of Roentgenology, 2006
The purpose of this article is to evaluate the usefulness of high-b-value diffusion-weighted MRI (DW-MRI) in the detection of colorectal adenocarcinoma.High-b-value DW-MRI allows detection of colorectal adenocarcinoma with a high sensitivity and specificity.
Tomoaki, Ichikawa, Sukru Mehmet, Erturk, Utarou, Motosugi, Hironobu, Sou, Hiroshi, Iino, Tsutomu, Araki, Hideki, Fujii   +6 more
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Spatial Variations of Seismic B-Values Distribution in China

Applied Mechanics and Materials, 2011
Seismic frequency-magnitude relationship has been investigated in China, based on the earthquake data in the range ofM3.0 toM7.0 during the years 1986-2008, to study the potential of variations ofb-values with the depth. According to the results, there is a systematic decrease inbvalue with increasing depth of earthquakes.
Xu J., Lacidogna G.
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Low b-value diffusion-weighted imaging for MRI liver exploration. What if we exclude the zero b value?

2023
Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest ...
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High b-Value Diffusion-Weighted MRI of Normal Brain

Journal of Computer Assisted Tomography, 2001
As MR scanner hardware has improved, allowing for increased gradient strengths, we are able to generate higher b values for diffusion-weighted (DW) imaging. Our purpose was to evaluate the appearance of the normal brain on DW MR images as the diffusion gradient strength ("b value") is increased from 1,000 to 3,000 s/mm2.Three sets of echo planar images
J H, Burdette, D D, Durden, A D, Elster, Y F, Yen   +3 more
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Diagnostic value of multi-b-value DWI for endometrial carcinoma and the optimal b value exploring

ISMRM Annual Meeting
Selecting the appropriate b value in DWI scanning to maximize the signal difference between endometrial tissues with different properties is conducive to the detection and accurate diagnosis of the endometrial lesion. The multiple b value DWI, especially b value > 1000 s/mm2, may play a crucial role in the detection of EC.
Ying Meng, Yuting Liang
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