Results 41 to 50 of about 5,621 (162)
A unified moment magnitude earthquake catalog for Northeast India
Geomatics, Natural Hazards & Risk, 2021 Earthquake-related studies on seismicity and seismic hazard assessment need a homogenous earthquake catalog for the region studied. A homogenous earthquake catalog for Northeast India region was compiled using derived regional and global empirical ...
Ranjit Das, Claudio Meneses
doaj +1 more source
Optimal estimation of scalar seismic moment [PDF]
Geophysical Journal of the Royal Astronomical Society, 1982 Summary. For any seismic source specified by a frequency-dependent moment-rate tensor M(ω), we define the total moment MT(ω) =||M||/2 and the isotropic moment MI(ω) =|trM|/6. A method is presented for estimating these scalar seismic moments from noisy seismic data when the source mechanism is uncertain or completely unknown.
Silver, Paul G., Jordan, Thomas H.
openaire +2 more sources
Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesIn 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
Geochemistry, Geophysics, Geosystems, 2020 We combine numerical modeling of lithospheric extension with analysis of seismic moment release and earthquake b‐value in order to elucidate the mechanism for deep crustal seismicity and seismic swarms in the Main Ethiopian Rift (MER).
Ameha A. Muluneh +7 more
doaj +1 more source
Горные науки и технологии, 2020 In mining technical literature, the prevailing idea is still that rockbursts in open pits and underground mines are caused by gravitational forces produced by the overburden rock mass, put forward in the 20th century by S.G. Avershin and I.M.
A. V. Lovchikov
doaj +1 more source
Moment tensor analysis of transversely isotropic shale based on the discrete element method
International Journal of Mining Science and Technology, 2017 In this study, the moment tensor of transversely isotropic shale was analyzed using a discrete element method-acoustic emission model (DEM-AE model). Firstly, the failure modes of the shale obtained from the acoustic emission (AE) events and physical ...
Zhaohui Chong +4 more
doaj +1 more source
Matched filtering for the seismic moment tensor
Geophysical Research Letters, 1976 By a process of matched filtering it is possible to deconvolve a small number of acceleration or strain records for the moment rate tensor of a seismic source. Theoretically, one horizontal accelerometer (or strain meter) or two vertical accelerometers is sufficient. Practically, five to ten records can be shown to suffice.
Ray Buland, Freeman Gilbert
openaire +1 more source
Seismic moment tensor event screening
Geophysical Journal International, 2020 SUMMARY Event screening is an explosion monitoring practice that aims to identify an event as an explosion (‘screened in’) or not (‘screened out’). Confidence in event screening can be increased if multiple independent approaches are used.
Sean R Ford +2 more
openaire +2 more sources
Geophysical Research LettersClassical relationships between cumulative and maximum seismic moment, based on the Gutenberg‐Richter law, shows a non‐physical anomaly for low b‐values. We here derive new relationships, including a low and a high b‐value approximation.
L. De Barros, D. Marsan
doaj +1 more source
Investigating Factors Influencing Moment Tensor Inversion of Induced Seismicity in Virtual IoT
IEEE Access, 2019 The Internet of Things (IoT) for seismicity in underground mine consists of a combination of sensor network hardware and software, which allows the collection of seismic data and data processing for basic event parameters.
Feiyue Wang +4 more
doaj +1 more source