Results 111 to 120 of about 2,291 (297)

Nonlinear Moment-Tensor Inversion of Repetitive Long-Periods Events Recorded at Pacaya Volcano, Guatemala

Frontiers in Earth Science, 2018
Detailed models of low-frequency seismicity at volcanoes provide insights into conduit structure and dynamics of magmatic systems. Many active volcanoes produce repetitive seismic events, but these are often too small to model on their own.
Federica Lanza, Federica Lanza, Gregory P. Waite   +2 more
doaj   +1 more source

Evaluations of the effectiveness of the near‐surface mounted steel materials in strengthening short RC wall‐like columns with openings

Structural Concrete, EarlyView.
Abstract In practice, reinforced concrete (RC) wall‐like columns often have openings to facilitate building services, which creates stress concentrations around the opening, resulting in the weakening of their load‐carrying capacity. This study proposes innovative strengthening methods using near‐surface mounted (NSM) incorporating steel materials to ...
Ahmed Hamoda, Mizan Ahmed, Mohamed Ghalla, Ahmad G. Saad, Aref A. Abadel   +4 more
wiley   +1 more source

Focal Mechanisms of Mw 6.3 Aftershocks from Waveform Inversions, Phayao Fault Zone, Northern Thailand

International Journal of Geophysics, 2017
The focal mechanisms of Mw 6.3 aftershocks, Chiang Rai Province, Northern Thailand, were determined by using a multistation waveform inversion. Three aftershocks were selected and their waveforms were inverted for moment tensor calculation.
Kasemsak Saetang
doaj   +1 more source

Moment tensor inversion of the 2016 southeast offshore Mie earthquake in the Tonankai region using a three-dimensional velocity structure model: effects of the accretionary prism and subducting oceanic plate

Earth, Planets and Space, 2018
The southeast offshore Mie earthquake occurred on April 1, 2016 near the rupture area of the 1944 Tonankai earthquake, where seismicity around the interface of the Philippine Sea plate had been very low until this earthquake.
Shunsuke Takemura, Takeshi Kimura, Tatsuhiko Saito, Hisahiko Kubo, Katsuhiko Shiomi   +4 more
doaj   +1 more source

Global seismicity of 1978: centroid-moment tensor solutions for 512 earthquakes

Physics of the Earth and Planetary Interiors, 1987
Abstract Centroid-moment tensor solutions are presented for 512 earthquakes that occurred during 1978.
Dziewonski, A, Ekstrom, G, Franzen, J, Woodhouse, J   +3 more
openaire   +2 more sources

A seismic study of the Krafla volcanic system, Iceland [PDF]

, 1990
Following a major crustal rifting episode centred on the Krafla volcanic system in Northeast Iceland, the local seismicity was monitored for three months using a dense network of single component seismometers.
Arnott, Stuart K.
core  

Performance enhancement of reinforced concrete columns using stainless steel and galvanized steel plates: Experimental and numerical investigation

Structural Concrete, EarlyView.
Abstract This study introduces an innovative approach to strengthening defected reinforced concrete (RC) columns using externally bonded stainless steel and galvanized steel plates. Unlike conventional strengthening methods, this technique replaces traditional transverse stirrups with steel sheets, providing enhanced confinement and ductility.
Ahmed Hamoda, Khaled Sennah, Ramy I. Shahin, Aref A. Abadel, Mizan Ahmed, Mohamed Ghalla   +5 more
wiley   +1 more source

Energy budgeting of laboratory hydraulic fracturing in granite with different viscosity injection fluids

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
In this study, we investigated the source parameters of microseismicity detected during laboratory hydraulic fracturing (HF) of granite conducted with high- (gear oil/1000 cP) and low- (water/1 cP) viscosity injection fluids.
A. Butt, A. Hedayat, O. Moradian
doaj   +1 more source

Characteristics of seismic acoustic emission of loaded rock containing pre-existing cracks based on the discrete element simulation

Meitan kexue jishu
To further elucidate the mechanism of acoustic emission (AE) response when a fractured rock is compressed, a new method for calculating the AE characteristics from the perspective of relative particle motion based on the moment tensor theory in ...
Wendong ZHOU, Yanwei CUI, Xiaoran WANG, Li CHEN, Ke XU, Gehui REN, Hao WANG, Leilei SI   +7 more
doaj   +1 more source

Global seismicity of 1979: centroid-moment tensor solutions for 524 earthquakes

Physics of the Earth and Planetary Interiors, 1987
Abstract Centroid-moment tensor solutions are presented for 524 earthquakes that occurred during 1979.
Dziewonski, A, Ekstrom, G, Franzen, J, Woodhouse, J   +3 more
openaire   +2 more sources