Results 61 to 70 of about 27,130 (200)

Robust seismic velocity change estimation using ambient noise recordings

, 2016
We consider the problem of seismic velocity change estimation using ambient noise recordings. Motivated by [23] we study how the velocity change estimation is affected by seasonal fluctuations in the noise sources. More precisely, we consider a numerical
Daskalakis, E., Evangelidis, C. P., Garnier, J., Melis, N. S., Papanicolaou, G., Tsogka, C.   +5 more
core   +1 more source

Separation of Body and Surface Wave Background Noise and Passive Seismic Interferometry Based on Synchrosqueezed Continuous Wavelet Transform

Applied Sciences
Passive seismic interferometry is a technique that reconstructs virtual seismic records using ambient noise, such as random noise or microseisms. The ambient noise in passive seismic data contains rich information, with surface waves being useful for the
Xiaolong Li, Fengjiao Zhang, Zhuo Xu, Xiangbo Gong   +3 more
doaj   +1 more source

Highly efficient Bayesian joint inversion for receiver-based data and its application to lithospheric structure beneath the southern Korean Peninsula [PDF]

, 2016
With the deployment of extensive seismic arrays, systematic and efficient parameter and uncertainty estimation is of increasing importance and can provide reliable, regional models for crustal and upper-mantle structure.We present an efficient Bayesian ...
Dettmer, Jan, Kim, Seongryong, Rhie, Junkee, Tkalčić, Hrvoje   +3 more
core   +1 more source

Assessment of seismic station performance in north Chhattisgarh, India: a comprehensive ambient noise analysis

Geomatics, Natural Hazards & Risk
A new network of 16 broadband seismic stations is operational in the northern Chhattisgarh region to monitor the seismicity arising in the otherwise seismically quiescent zone. Ambient noise is comprehensively analyzed to evaluate station performance and
Maitreyi, Chandrani Singh, Arun Singh, Mita Uthaman, Sukanta Sarkar, Gaurav Kumar, Abhisek Dutta, Aamir Salam Siddiqui, Shirish Bose   +8 more
doaj   +1 more source

GAN-LSTM Joint Network Applied to Seismic Array Noise Signal Recognition

Applied Sciences, 2021
The purpose of seismic data processing in nuclear explosion monitoring is to accurately and reliably detect seismic or explosion events from complex ambient noises.
Jian Li, Dongwei Hei, Gaofeng Cui, Mengmin He, Juan Wang, Zhehan Liu, Jie Shang, Xiaoming Wang, Weidong Wang   +8 more
doaj   +1 more source

On measuring surface wave phase velocity from station–station cross-correlation of ambient signal [PDF]

, 2012
We apply two different algorithms to measure surface wave phase velocity, as a function of frequency, from seismic ambient noise recorded at pairs of stations from a large European network. The two methods are based on consistent theoretical formulations,
Abramowitz, Aki, Andrea Zunino, Basini, Bensen, Boschi, Cornelis Weemstra, Cox, Derode, Domenico Giardini, Dziewonski, Ekström, Fry, Gouedard, Göran Ekström, Harmon, Julie Verbeke, Lapo Boschi, Lin, Lin, Lin, Meier, Mulargia, Nakahara, Nishida, Paige, Peter, Ritzwoller, Seats, Shapiro, Shapiro, Shapiro, Snieder, Stehly, Stehly, Tromp, Tsai, Tsai, Tsai, Udías, Verbeke, Villasenor, Weemstra, Yang, Yao, Yao, Yokoi, Zheng   +47 more
core   +4 more sources

Seismic anisotropy from 6C ground motions of ambient seismic noise

Journal of Geophysical Research: Solid Earth
AbstractWe propose a new approach capable of measuring local seismic anisotropy from 6C (three‐component translation and three‐component rotation) amplitude observations of ambient seismic noise data. Our recent theory demonstrates that the amplitude ratio of 6C cross‐correlation functions (CCFs) enables retrieving the local phase velocity.
Tang, Le, Igel, Heiner, Montagner, Jean‐Paul, Vernon, Frank   +3 more
openaire   +4 more sources

High-Resolution Surface-Wave Tomography from Ambient Seismic Noise [PDF]

Science, 2005
Cross-correlation of 1 month of ambient seismic noise recorded at USArray stations in California yields hundreds of short-period surface-wave group-speed measurements on interstation paths. We used these measurements to construct tomographic images of the principal geological units of California, with low-speed anomalies corresponding to the main ...
Shapiro, N.M., Campillo, Michel, Stehly, L., Ritwoller, M.H.   +3 more
openaire   +3 more sources

SeisMIC - an Open Source Python Toolset to Compute Velocity Changes from Ambient Seismic Noise

Seismica
We present SeisMIC, a fast, versatile, and adaptable open-source software to estimate seismic velocity changes from ambient seismic noise. SeisMIC includes a broad set of tools and functions to facilitate end-to-end processing of ambient noise data ...
Peter Makus, Christoph Sens-Schönfelder
doaj   +1 more source

Toward Forecasting Volcanic Eruptions using Seismic Noise

, 2007
During inter-eruption periods, magma pressurization yields subtle changes of the elastic properties of volcanic edifices. We use the reproducibility properties of the ambient seismic noise recorded on the Piton de la Fournaise volcano to measure relative
A Grêt, A Nercessian, A Peltier, A Peltier, A Ratdomopurbo, Alexandre Nercessian, B Chouet, B Chouet, B Voight, C Sens-Schönfelder, D Massonnet, D Patanè, D Patanè, F Brenguier, Florent Brenguier, G Poupinet, J Battaglia, KG Sabra, KG Sabra, KG Sabra, L Stehly, L Stieltjes, M Campillo, M Campillo, Michel Campillo, N Shapiro, Nikolai M. Shapiro, NM Shapiro, Olivier Coutant, P McLeod, R Snieder, RL Weaver, S Tait, SR Pride, U Wegler, Valérie Ferrazzini, Zacharie Duputel   +36 more
core   +4 more sources