Results 71 to 80 of about 97,855 (331)

Prediction of Large Events on a Dynamical Model of a Fault

, 1993
We present results for long term and intermediate term prediction algorithms applied to a simple mechanical model of a fault. We use long term prediction methods based, for example, on the distribution of repeat times between large events to establish a ...
Aki, Archuletta, B. E. Shaw, Bak, Bakun, Bakun, Burridge, Carlson, Carlson, Carlson, Carlson, Chen, Davis, Davison, Dieterich, Gabrielov, Healy, J. M. Carlson, Kanamori, Keilis-Borok, Keilis-Borok, Keilis-Borok, Kiremidjian, Langer, Langer, Malin, McNalley, Mogi, Molchan, Molchan, Nishenko, Pacheco, S. L. Pepke, Scholz, Schwartz, Shaw, Shaw, Shaw, Shimazaki, Sykes, Thatcher, Vasconcelos, Ward, Wesnousky, Working Group on California Earthquake Prediction, Working Group on California Earthquake Prediction (WG-CEP), Wyss   +46 more
core   +1 more source

Probability prediction of true‐triaxial compressive strength of intact rocks based on the improved PSO‐RVM model

Deep Underground Science and Engineering, EarlyView.
In this work, we propose an improved particle swarm optimization (PSO) algorithm and develop an improved PSO‐relevance vector machine (RVM) model as a substitute for traditional true‐triaxial testing. The model's high prediction accuracy was validated through comparisons with two other machine learning methods and five three‐dimensional Hoek–Brown type
Qi Zhang, Maohui Wang, Ning Wang, Yixin Shen, Xuzhen He   +4 more
wiley   +1 more source

Geochemical Characteristics of Thermal Springs and Insights Into the Intersection Between the Xiaojiang Fault and the Red River Fault, Southeastern Tibet Plateau

Geochemistry, Geophysics, Geosystems
During the ongoing uplift and expansion of the southeastern margin of the Tibetan Plateau, the front edge of the Sichuan‐Yunnan rhombic block (SYB) has experienced intense tectonic activity and frequent seismicity.
Weiye Shao, Zhaofei Liu, Ying Li, Zhi Chen, Chang Lu, Ciping Zhao, Yun Wang, Qilin Li, Zihan Gao, Yili Luo, Hua Ran, Shaohui Fan   +11 more
doaj   +1 more source

Which is heterogeneous, stress or strength? An estimation from high-density seismic observations

Earth, Planets and Space, 2017
Using data from high-density seismic observation networks installed in the western Nagano Prefecture region in Japan, we precisely determined focal mechanisms and estimated the high-resolution stress field at a scale of 1 km.
Yoshihisa Iio, Itaru Yoneda, Masayo Sawada, Tsutomu Miura, Hiroshi Katao, Yoichiro Takada, Kentaro Omura, Shigeki Horiuchi   +7 more
doaj   +1 more source

Linear perturbations of the Bloch type of space-periodic magnetohydrodynamic steady states. I. Mathematical preliminaries

Russian Journal of Earth Sciences, 2023
We consider Bloch eigenmodes in three linear stability problems: the kinematic dynamo problem, the hydrodynamic and MHD stability problem for steady space-periodic flows and MHD states. A Bloch mode is a product of a field of the same periodicity, as the
Chertovskih R, Zheligovsky V
doaj   +1 more source

Study on the failure mechanism of the shield excavation face in the sandy cobble stratum under different buried depths

Deep Underground Science and Engineering, EarlyView.
Abstract One of the significant challenges faced in shield tunnel construction is the risk of collapse resulting from abrupt changes in soil conditions in advance of the working face, particularly within the sandy cobble stratum. This study aims to effectively manage these sudden variations and to further investigate the failure mechanisms associated ...
Hua Jiang, Chongyang Liu, Ao Zhang, Xiaoyan Zhang, Yuhang Li   +4 more
wiley   +1 more source

Deep tectonics and seismogenic mechanisms of the seismic source zone of the Jishishan Ms 6.2 earthquake on December 18, 2023, at the northeast margin of the Tibetan Plateau

Earth and Planetary Physics
On December 18, 2023, an Ms 6.2 earthquake occurred in Jishishan, Gansu Province, China. This earthquake happened in the eastern region of the Qilian Orogenic Belt, which is situated at the forefront of the NE margin of the Tibetan Plateau (i.e., Qinghai–
Qiong Wang, ShuYu Li, XinYi Li, Yue Wu, PanPan Zhao, Yuan Gao   +5 more
doaj   +1 more source

Effect of confining pressure on fracture characteristics and mineralogical behavior of tight sandstone specimens after hydraulic fracturing

Deep Underground Science and Engineering, EarlyView.
Hydraulic fracturing in tight sandstone and fracture propagation characteristics using backscattered electron‐scanning electron microscope (BSE‐SEM) images. Abstract This study focuses on hydraulic fracturing experiments conducted under triaxial conditions on tight sandstone specimens from Shivpuri district, Madhya Pradesh, India.
Pankaj Rawat, Narendra Kumar Samadhiya
wiley   +1 more source

Forecasting ability of a multi-renewal seismicity model for Italy

, 2013
The inter-event time, IET, is sometimes used as a basis for prediction of large earthquakes. It is the case when theoretical analysis of prediction is possible. Quite recently a specific IET- model was suggested for dynamic probabilistic prediction of M >
Molchan, G., Romashkova, L.
core   +1 more source

Rockburst prediction based on data preprocessing and hyperband‐RNN‐DNN

Deep Underground Science and Engineering, EarlyView.
A data preprocessing workflow is proposed to address challenges in rockburst data analysis. Coupled algorithms preprocess the data set, and hyperband optimization is used to enhance RNN performance. Results show that preprocessing improves accuracy, while dense layers enhance model stability and prediction performance.
Yong Fan, Chenxi Yin, Guangdong Yang, Shengyong Ding, Bin Tian   +4 more
wiley   +1 more source