Results 1 to 10 of about 255 (105)

Crustal structure and the seismogenic environment in Yunnan imaged by double-difference tomography

Frontiers in Earth Science, 2023
The large-scale faulting and earthquake activities that developed extensively in the Yunnan area are associated with the collision of India and Eurasia. The fine crustal structure can provide a better understanding of the crustal deformation, seismogenic
Ya Sun, Ya Sun, Shilin Deng, Shilin Deng, Jiwen Huang, Jiwen Huang   +5 more
doaj   +4 more sources

Complex Structure in the Nootka Fault Zone Revealed by Double‐Difference Tomography and a New Earthquake Catalog [PDF]

Geochemistry, Geophysics, Geosystems, 2022
We employ an automatic earthquake detection algorithm to seismic waveforms recorded between the years 2000 and 2020 in southwest British Columbia. 32,121 events which possess at least three paired P‐ and S‐wave arrival times are located, compared to 21 ...
Reid J. Merrill, Michael G. Bostock, Simon M. Peacock, Andrew J. Schaeffer, Steven W. Roecker   +4 more
doaj   +3 more sources

Development and Applications of Double-difference Seismic Tomography

Pure and Applied Geophysics, 2006
Double-difference (DD) tomography is a generalization of DD location; it simultaneously solves for the three-dimensional velocity structure and seismic event locations. DD tomography uses a combination of absolute and more accurate differential arrival times and hierarchically determines the velocity structure from larger scale to smaller scale.
Clifford Thurber, Haijiang Zhang, Zhang Haijiang   +2 more
exaly   +3 more sources

An efficient algorithm for double-difference tomography and location in heterogeneous media, with an application to the Kilauea volcano [PDF]

Journal of Geophysical Research, 2005
Improving our understanding of crustal processes requires a better knowledge of the geometry and the position of geological bodies. In this study we have designed a method based upon double‐difference relocation and tomography to image, as accurately as possible, a heterogeneous medium containing seismogenic objects.
Vadim Monteiller, Jean-Luc Got
exaly   +4 more sources

Imaging the subducting slab and mantle upwelling under the Japan islands revealed by double-difference tomography

Frontiers in Earth Science, 2023
In this paper, we collected the seismic phase arrival data of 14,033 local natural earthquakes above magnitude 3.0 recorded by 435 seismograph stations in the study area provided by the International Seismological Centre (ISC), covering the period from ...
Zhengshuai Zhang, Zhengshuai Zhang, Jianchang Zheng, Shuhao Wang, Cuiqin Li, Fangbin Liu   +5 more
doaj   +2 more sources

Double-difference tomography in the Qinling orogenic belt and its adjacent areas

地震科学进展
The Qinling orogenic belt and its adjacent areas serve as the convergence zone between the North China craton, the Yangtze craton, and the northeastern edge of the Qinghai-Xizang Plateau are characterized by complex tectonic activity. This study utilizes
Yuchen Xiao, Shaoxing Hui, Kai Ma, Yaning Liu   +3 more
doaj   +2 more sources

Back azimuth constrained double-difference seismic location and tomography for downhole microseismic monitoring [PDF]

Physics of the Earth and Planetary Interiors, 2017
Abstract We have developed a new seismic tomography method, back azimuth constrained double-difference (DD) seismic tomography, which is suitable for downhole microseismic monitoring of hydraulic fracturing. The new method simultaneously locates microseismic events and determines three-dimensional (3D) Vp and Vs models for the fracturing zone using ...
Haijiang Zhang
exaly   +2 more sources

Vertical high-velocity structures and seismic activity in western Shandong Rise, China: Case study inspired by double-difference seismic tomography

Open Geosciences
In this article, we collected the seismic phase arrival data (115°–120°E, 34°–39°N) of 2,833 local natural earthquakes above magnitude 1.0 recorded by 128 seismograph stations provided by the China Earthquake Networks Center covering the period from ...
Zhang Zhengshuai, Zheng Jianchang, Yin Di, Li Bo, Guo Yuqin, Chai Guangbin, Wu Jing, Wu Yang   +7 more
doaj   +2 more sources

Preliminary Results of Double Difference Tomography at Sunda-Banda Arc [PDF]

IOP Conference Series: Earth and Environmental Science, 2021
Abstract The Sunda-Arc transition to the Banda Arc is located on the south of the Flores Island, Indonesia, where the Australian lithosphere is moving to the north direction. On-going subduction process dictates the tectonic setting though some studies also suggest a collision and obduction may occur in the past due to of plate buoyancy.
null Haolia, M. I. Sulaiman, P. T. Brilianti, R. P. Nugroho, I. Madrinovella, A. Abdullah, D. A. Zaky, S. K. Suhardja, A. Priyono, S. Widiyantoro, M. Ramdhan, A. M. S. Nugraha   +11 more
openaire   +1 more source

唐山地区近十年地震的重定位研究

Dizhen xuebao, 2021
分别运用双差定位法、结合波形互相关的双差定位法和结合波形互相关的双差层析成像法，对唐山地区2010年1月至2020年7月河北地震台网记录的4 874个地震事件进行重定位。结果表明：结合波形互相关的双差层析成像法的定位精度高于其它两种方法，地震走时均方根残差由初始的0.71降至0.27；重定位后的震中分布更加集中，线性分布更明显，优势分布方向为NE向，与该区域断层走向基本一致；重定位后震源深度主要集中在5—15 km，分布形态更接近于正态分布，结果更加合理。从重定位后的震中空间分布可见在唐山 ...
Lei Guo, Lina Sun, Yi Zhou, Ning Wang
doaj   +1 more source