FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W96640330> ?p ?o ?g. }

• W96640330 abstract "We address the problem of energy partitioning at distances ranging from very local to regional for various kinds of seismic sources, and are now in the last year of this three-year effort. On the small scale we have focused on analysis of observations from an in-mine network of 16-18 sensors in the Pyhasalmi mine in central Finland. This analysis has been supplemented with 3-D finite difference wave propagation simulations to investigate the physical mechanisms that partition seismic energy in the near source region in and around the underground mine. On the local and regional scale (20-220 km) we have targeted events from the region offshore Western Norway where we have both natural earthquake activity as well as frequent occurrence of underwater explosions carried out by the Norwegian Navy. Since the previous reporting of this project at the 2004 Seismic Research Review (Bungum et al., 2004), we have extended the finite difference simulations in the 3-D geological model of the Pyhasalmi mine. This model, which encompasses a geologic volume 500 meters in each direction, includes 3-D representations of the ore bodies, excavated regions, tunnels, and voids. The model is discretized on both 2 and 4 meter grids making it possible to simulate seismic energy up to 100-200 Hz. We perform a variety of sensitivity tests to determine the mechanisms that produce shear energy in an underground mine environment. For example, we conduct a suite of 15,000 (2-D) explosive source simulations to quantify the influence of source location on the amplitude of generated shear energy. In fact, most of the shear energy appears to be generated within 10-20 meters from the source (at frequencies of 50 Hz). Examination of waveforms reveals that both geologic heterogeneity and the structural influences of the mine are contributors to the near-source generation of shear energy. There is some suggestion that the effects of geologic inhomogeneity are significant early in the wavetrain, whereas the mine structure is likely to produce scatter and be more significant later in the waveforms. As a validation measure, the synthetic waveforms are compared with observed data from single and multi-component instruments located in the mine. The simulated data match the amplitude and character of the observed waveforms particularly well, especially at frequencies at and below 50 Hz. This suggests that we can reliably infer energy partitioning phenomena based on these simulations. A database of underwater explosions and earthquakes from the region offshore Western Norway, recorded at seven selected stations of the National Norwegian Seismic Network (NNSN), were analyzed for differences in the S/P amplitude ratios. In order to separate the path and source effects for the two event populations, we have investigated the station, distance, and frequency dependencies of the recorded data in detail. The results indicate that the mean S/P amplitude ratios for both underwater explosions and natural events vary from station to station but are, in general, higher for natural events. For frequencies above 3 Hz, the difference in S/P ratios between explosions and natural events is higher than for lower frequencies. However, the distributions of S/P ratios for explosions and natural events overlap in all analyzed frequency bands. Thus, for individual events in our study area, S/P amplitude ratios can assist the discrimination between an explosion or a natural event, but other measures such as spectral analysis should be included in the interpretation." @default.
• W96640330 created "2016-06-24" @default.
• W96640330 creator A5021086097 @default.
• W96640330 creator A5030891175 @default.
• W96640330 creator A5033236004 @default.
• W96640330 creator A5038702391 @default.
• W96640330 creator A5062282174 @default.
• W96640330 creator A5077486540 @default.
• W96640330 creator A5085042227 @default.
• W96640330 creator A5091707368 @default.
• W96640330 date "2004-01-01" @default.
• W96640330 modified "2023-09-26" @default.
• W96640330 title "Energy partitioning for seismic events in Fennoscandia and NW Russia" @default.
• W96640330 cites W103301683 @default.
• W96640330 cites W1584439895 @default.
• W96640330 cites W1629132018 @default.
• W96640330 cites W1964262954 @default.
• W96640330 cites W1975852205 @default.
• W96640330 cites W2038127544 @default.
• W96640330 cites W2071695384 @default.
• W96640330 cites W2113987921 @default.
• W96640330 cites W2125185451 @default.
• W96640330 cites W2131461490 @default.
• W96640330 cites W2155722796 @default.
• W96640330 cites W2338095465 @default.
• W96640330 cites W285572368 @default.
• W96640330 cites W78963287 @default.
• W96640330 hasPublicationYear "2004" @default.
• W96640330 type Work @default.
• W96640330 sameAs 96640330 @default.
• W96640330 citedByCount "1" @default.
• W96640330 crossrefType "journal-article" @default.
• W96640330 hasAuthorship W96640330A5021086097 @default.
• W96640330 hasAuthorship W96640330A5030891175 @default.
• W96640330 hasAuthorship W96640330A5033236004 @default.
• W96640330 hasAuthorship W96640330A5038702391 @default.
• W96640330 hasAuthorship W96640330A5062282174 @default.
• W96640330 hasAuthorship W96640330A5077486540 @default.
• W96640330 hasAuthorship W96640330A5085042227 @default.
• W96640330 hasAuthorship W96640330A5091707368 @default.
• W96640330 hasConcept C127313418 @default.
• W96640330 hasConcept C154238967 @default.
• W96640330 hasConcept C162284963 @default.
• W96640330 hasConcept C165205528 @default.
• W96640330 hasConcept C16674752 @default.
• W96640330 hasConcept C166957645 @default.
• W96640330 hasConcept C187320778 @default.
• W96640330 hasConcept C205649164 @default.
• W96640330 hasConcept C2993348884 @default.
• W96640330 hasConceptScore W96640330C127313418 @default.
• W96640330 hasConceptScore W96640330C154238967 @default.
• W96640330 hasConceptScore W96640330C162284963 @default.
• W96640330 hasConceptScore W96640330C165205528 @default.
• W96640330 hasConceptScore W96640330C16674752 @default.
• W96640330 hasConceptScore W96640330C166957645 @default.
• W96640330 hasConceptScore W96640330C187320778 @default.
• W96640330 hasConceptScore W96640330C205649164 @default.
• W96640330 hasConceptScore W96640330C2993348884 @default.
• W96640330 hasLocation W966403301 @default.
• W96640330 hasOpenAccess W96640330 @default.
• W96640330 hasPrimaryLocation W966403301 @default.
• W96640330 hasRelatedWork W1519974800 @default.
• W96640330 hasRelatedWork W1976027906 @default.
• W96640330 hasRelatedWork W2062132068 @default.
• W96640330 hasRelatedWork W2064755110 @default.
• W96640330 hasRelatedWork W2111903535 @default.
• W96640330 hasRelatedWork W2138351210 @default.
• W96640330 hasRelatedWork W2276257680 @default.
• W96640330 hasRelatedWork W2302421564 @default.
• W96640330 hasRelatedWork W2328071782 @default.
• W96640330 hasRelatedWork W2505190497 @default.
• W96640330 hasRelatedWork W2532207311 @default.
• W96640330 hasRelatedWork W2588105454 @default.
• W96640330 hasRelatedWork W2598021235 @default.
• W96640330 hasRelatedWork W2920125547 @default.
• W96640330 hasRelatedWork W2937212471 @default.
• W96640330 hasRelatedWork W2947958460 @default.
• W96640330 hasRelatedWork W3019551321 @default.
• W96640330 hasRelatedWork W3116556449 @default.
• W96640330 hasRelatedWork W833786 @default.
• W96640330 hasRelatedWork W2184041551 @default.
• W96640330 isParatext "false" @default.
• W96640330 isRetracted "false" @default.
• W96640330 magId "96640330" @default.
• W96640330 workType "article" @default.