Results 31 to 40 of about 13,644 (204)

Sensitivity analysis of anisotropic parameter inversion simultaneously with microseismic source location in layered VTI media

Frontiers in Earth Science, 2022
The hypocenters of microseismic events induced by hydraulic fracturing are conventionally located with an initial model established from well logs or perforation shots.
Yikang Zheng, Yikang Zheng, Yibo Wang, Yibo Wang   +3 more
doaj   +1 more source

Investigating rock mass failure precursors using a multi-sensor monitoring system. Preliminary results from a test-site (Acuto, Italy) [PDF]

, 2017
In the last few years, several approaches and methods have been proposed to improve early warning systems for managing risks due to rapid slope failures where important infrastructures are the main exposed elements. To this aim, a multi-sensor monitoring
Fantini, Andrea, Fiorucci, Matteo, Martino, Salvatore, Paciello, Antonella   +3 more
core   +1 more source

An Anisotropic Velocity Model for Microseismic Events Localization in Tunnels

Sensors, 2023
The velocity model is one of the main factors affecting the accuracy of microseismic event localization. This paper addresses the issue of the low accuracy of microseismic event localization in tunnels and, combined with active-source technology ...
Tong Shen, Songren Wang, Xuan Jiang, Guili Peng, Xianguo Tuo   +4 more
doaj   +1 more source

Wiener filtering with a seismic underground array at the Sanford Underground Research Facility [PDF]

, 2014
A seismic array has been deployed at the Sanford Underground Research Facility in the former Homestake mine, South Dakota, to study the underground seismic environment.
Christensen, Nelson, Coughlin, Michael, Dergachev, Vladimir, DeSalvo, Riccardo, Harms, Jan, Kandhasamy, Shivaraj, Mandic, Vuk   +6 more
core   +2 more sources

Coastal cliff ground motions and response to extreme storm waves [PDF]

, 2015
Coastal cliff erosion from storm waves is observed worldwide, but the processes are notoriously difficult to measure during extreme storm wave conditions when most erosion normally occurs, limiting our understanding of cliff processes.
Adam P. Young, Adams, Adams, Alexander, Brain, Claire S. Earlie, Crawford, Dickson, Earlie, Gerd Masselink, Gutenberg, Komar, Lague, Leveridge, Longuet-Higgins, Masselink, Paul E. Russell, Ramirez, Ridgewell, Rodgers, Scott, Tillotson, Webb, Young, Young, Young, Zopf   +26 more
core   +2 more sources

Anisotropy in Fracking: A Percolation Model for Observed Microseismicity

, 2014
Hydraulic fracturing (fracking) using high pressures and a low viscosity fluid allow the extraction of large quantiles of oil and gas from very low permeability shale formations.
Norris, J. Quinn, Rundle, John B., Turcotte, Donald L.   +2 more
core   +1 more source

Microseismic clustering degree: concept, algorithm and application of five-dimensional index of microseismic spatiotemporal evolution

Meitan xuebao
Microseismic monitoring has become an important means of mine safety identification and early warning, but the spatiotemporal evolution mechanism based on microseismic and its correlation with rock activity still need to be solved urgently.
Xianjie HAO, Huaixiang YANG, Pengzhi PAN, Honglan ZHANG, Hang LI, Zhaofeng WANG, Guangyao PAN   +6 more
doaj   +1 more source

Detection and Denoising of Microseismic Events Using Time–Frequency Representation and Tensor Decomposition

IEEE Access, 2018
Reliable detection and recovery of a microseismic event in large volume of passive monitoring data is usually a challenging task due to the low signal-to-noise ratio environment.
Naveed Iqbal, Entao Liu, James H. McClellan, Abdullatif Al-Shuhail, Sanlinn I. Kaka, Azzedine Zerguine   +5 more
doaj   +1 more source

Strain rate and temperature dependence of Omori law scaling constants of AE data: Implications for earthquake foreshock-aftershock sequences [PDF]

, 2004
Little is known about the temperature and strain rate dependence of acoustic emission AE activity (AE). Hence, we carried out a preliminary series of flow-through triaxial compression tests on porous sandstones at different temperatures and strain rates.
Aki, Costin, Frohlich, Helmstetter, Hirata, Hirata, Ira O. Ojala, Liakopoulou-Morris, Lockner, Lockner, Lockner, Main, Main, Meredith, Mogi, Mogi, Ojala, Ojala, Sano, Scholz, Utsu, Vinciguerra, Von Seggern, Yabe, Yanagidani   +24 more
core   +1 more source

Bilinear Magnitude‐Frequency Distributions and Characteristic Earthquakes During Hydraulic Fracturing

Geophysical Research Letters, 2018
Previous studies show that a temporal drop in the b value (slope) of magnitude‐frequency distributions observed during hydraulic‐fracturing operations could signify the activation of a preexisting fault system.
Nadine Igonin, Megan Zecevic, David W. Eaton   +2 more
doaj   +1 more source