Results 51 to 60 of about 63,975 (205)
Review of progress in seismic exploration in metallic deposits
地球与行星物理论评, 2022 With the exhaustion of near-surface metal mineral resources, exploration in the second space (500～2 000 m) is an inevitable trend in the future. The conventional gravity, magnetic and electrical signals are severely attenuated with depth and cannot meet ...
Cong Tang +3 more
doaj +1 more source
Passive seismic measurement of seismic attenuation in Delaware Basin
The Leading Edge, 2019 Local earthquake activity can be employed to measure attenuation (the effective quality factor [Q]) and characterize production in the Delaware Basin, Texas, USA. To illustrate this, we employed data from the recently installed Texas Seismic Network (TexNet) seismic stations collected in the west Texas area between April 2017 and March 2018 ...
Drwiła, M. +4 more
openaire +3 more sources
Results from the Apollo passive seismic experiment [PDF]
Recent results from the Apollo seismic network suggest that primitive differentiation occurred in the outer shell of the moon to a depth of approximately 300 km; and the central region of the moon is presently molten to a radius of between 200 and 300 km.
Dorman, J. +5 more
core +4 more sources
Automated shear-wave splitting analysis for single- and multi- layer anisotropic media
Seismica, 2023 Shear-wave velocity anisotropy is present throughout the earth. The strength and orientation of anisotropy can be observed by shear-wave splitting (birefringence) accumulated between earthquake sources and receivers. Seismic deployments are getting ever
Thomas Samuel Hudson +2 more
doaj +1 more source
Passive, Nonlinear, Mechanical Structures for Seismic Attenuation [PDF]
Journal of Computational and Nonlinear Dynamics, 2005 Gravitational wave detectors aim to detect strain perturbations of space-time on the order of 10−21–10−22 at frequencies between 1Hz and a few kHz. This space-time strain, integrated over kilometer scale interferometers, will induce movements of suspended mirrors on the order of 10−18–10−19m.
openaire +2 more sources
Re-Analysis of HFT Data Using the Apollo Lunar Surface Gravimeter Data [PDF]
, 2008 Introduction: The Apollo Passive Seismic Experiment (PSE) was carried out on Apollo 12, 14, 15 and 16. Network observations of four seismic stations were performed for five years from 1972 to 1977. The PSE was a successful mission that informed us of the
Hagermann, A. +4 more
core
Passive seismic interferometry by multidimensional deconvolution
GEOPHYSICS, 2008 We introduce seismic interferometry of passive data by multidimensional deconvolution (MDD) as an alternative to the crosscorrelation method. Interferometry by MDD has the potential to correct for the effects of source irregularity, assuming the first arrival can be separated from the full response.
Wapenaar, C.P.A. (author) +2 more
openaire +5 more sources
ALSEP termination report [PDF]
, 1979 The Apollo Lunar Surface Experiments Package (ALSEP) final report was prepared when support operations were terminated September 30, 1977, and NASA discontinued the receiving and processing of scientific data transmitted from equipment deployed on the ...
Bates, J. R. +2 more
core +1 more source
An analytical model for gas overpressure in slug-driven explosions:insights into Strombolian volcanic eruptions [PDF]
, 2012 Strombolian eruptions, common at basaltic volcanoes, are mildly explosive events that are driven by a large bubble of magmatic gas (a slug) rising up the conduit and bursting at the surface.
Del Bello, Elisabetta +4 more
core +1 more source
Applied Sciences(1) Background: In most cases, passive isolation control methods are commonly used for the seismic isolation design in bridge engineering. However, passive seismic isolation devices, due to their non-adjustable performance parameters, struggle to achieve
Ying Sheng +3 more
doaj +1 more source