FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2053178045> ?p ?o ?g. }

• W2053178045 endingPage "420" @default.
• W2053178045 startingPage "401" @default.
• W2053178045 abstract "We have explored the long-period seismic response of several idealized isotropic and anisotropic earth models to determine the observable aspects of anisotropy in the Earth's upper mantle. The models chosen are zonally symmetric (i.e. constant with respect to longitude), with 3.0 per cent and ∼1.5 per cent peak-to-peak perturbations to shear and compressional velocities, respectively, to a depth of 216 km. Our calculations suggest that upper mantle azimuthal anisotropy of a few per cent, spatially coherent over the length scale of a typical ocean basin, is sufficient to generate significant waveform anomalies in long-period seismic records. These anomalies are termed ‘quasi-Love’ and ‘quasi-Rayleigh’ waves, and are best observed for shallow events near the Rayleigh and Love source-radiation minima, respectively. For three large, recent, shallow, predominantly strike-slip events, seismic observations at stations with auspicious source-receiver geometry show evidence for 4-7 mHz waveforms similar to those seen in synthetic experiments for ‘smooth’ anisotropic mantle structure. We infer the presence of smoothly varying upper mantle anisotropy after determining that other causative factors are less plausible. The waveforms observed could be explained by isotropic structures, but the velocity perturbations would need to be >20 per cent to explain the observations in the 4-7 mHz bandpass. ‘Rough’ anisotropic structure is also a possibility, but our calculations suggest that regional-scale anisotropy of a few per cent, if globally pervasive rather than confined to some regions (e.g. plate collision zones), would cause strong mixed-type coupling at frequencies f ≫ 10 mHz. In the data we have analysed, the quasi-Love waveforms appear to be bandlimited to f ≲ 10 − 15 mHz, depending on the source-receiver pair. Angular selection criteria for coupling between fundamental spheroidal and toroidal modes suggest that this frequency dependence is consistent with the presence of upper mantle anisotropy with angular degrees s ≲ 10 − 15 and peak amplitude of a few per cent. However, the restriction of quasi-Love waveforms to Rayleigh wave minima restricts our resolution, for three predominantly strike-slip earthquakes, to six great circles, not one of which is free from apparent waveform anomalies." @default.
• W2053178045 created "2016-06-24" @default.
• W2053178045 creator A5049424223 @default.
• W2053178045 creator A5050734459 @default.
• W2053178045 date "1992-09-01" @default.
• W2053178045 modified "2023-10-18" @default.
• W2053178045 title "Anisotropy and coupled free oscillations: simplified models and surface wave observations" @default.
• W2053178045 cites W1967202511 @default.
• W2053178045 cites W1970815134 @default.
• W2053178045 cites W1973835318 @default.
• W2053178045 cites W1974029863 @default.
• W2053178045 cites W1976931828 @default.
• W2053178045 cites W1977068409 @default.
• W2053178045 cites W1978420971 @default.
• W2053178045 cites W1992084355 @default.
• W2053178045 cites W2004262022 @default.
• W2053178045 cites W2015438872 @default.
• W2053178045 cites W2016909562 @default.
• W2053178045 cites W2017888443 @default.
• W2053178045 cites W2021159034 @default.
• W2053178045 cites W2023088951 @default.
• W2053178045 cites W2028130517 @default.
• W2053178045 cites W2028935437 @default.
• W2053178045 cites W2029313738 @default.
• W2053178045 cites W2029764129 @default.
• W2053178045 cites W2035414075 @default.
• W2053178045 cites W2036536787 @default.
• W2053178045 cites W2040234272 @default.
• W2053178045 cites W2046976960 @default.
• W2053178045 cites W2050205880 @default.
• W2053178045 cites W2053245456 @default.
• W2053178045 cites W2057307775 @default.
• W2053178045 cites W2062221814 @default.
• W2053178045 cites W2069615137 @default.
• W2053178045 cites W2070571363 @default.
• W2053178045 cites W2071692307 @default.
• W2053178045 cites W2072247666 @default.
• W2053178045 cites W2073212423 @default.
• W2053178045 cites W2073890181 @default.
• W2053178045 cites W2074290076 @default.
• W2053178045 cites W2074672857 @default.
• W2053178045 cites W2078246554 @default.
• W2053178045 cites W2078640495 @default.
• W2053178045 cites W2079863923 @default.
• W2053178045 cites W2086510536 @default.
• W2053178045 cites W2089480904 @default.
• W2053178045 cites W2092972158 @default.
• W2053178045 cites W2093055644 @default.
• W2053178045 cites W2094772134 @default.
• W2053178045 cites W2104317624 @default.
• W2053178045 cites W2104609796 @default.
• W2053178045 cites W2110210567 @default.
• W2053178045 cites W2110660924 @default.
• W2053178045 cites W2110876911 @default.
• W2053178045 cites W2112009358 @default.
• W2053178045 cites W2120038138 @default.
• W2053178045 cites W2121258405 @default.
• W2053178045 cites W2122668821 @default.
• W2053178045 cites W2126159492 @default.
• W2053178045 cites W2127765832 @default.
• W2053178045 cites W2132332712 @default.
• W2053178045 cites W2132996707 @default.
• W2053178045 cites W2135783727 @default.
• W2053178045 cites W2136785205 @default.
• W2053178045 cites W2144866450 @default.
• W2053178045 cites W2145963600 @default.
• W2053178045 cites W2146115179 @default.
• W2053178045 cites W2150408549 @default.
• W2053178045 cites W2155530152 @default.
• W2053178045 cites W2155722796 @default.
• W2053178045 cites W2159598374 @default.
• W2053178045 cites W2160406865 @default.
• W2053178045 cites W2160473779 @default.
• W2053178045 cites W2161079476 @default.
• W2053178045 cites W2167380722 @default.
• W2053178045 doi "https://doi.org/10.1111/j.1365-246x.1992.tb02082.x" @default.
• W2053178045 hasPublicationYear "1992" @default.
• W2053178045 type Work @default.
• W2053178045 sameAs 2053178045 @default.
• W2053178045 citedByCount "68" @default.
• W2053178045 countsByYear W20531780452012 @default.
• W2053178045 countsByYear W20531780452013 @default.
• W2053178045 countsByYear W20531780452014 @default.
• W2053178045 countsByYear W20531780452015 @default.
• W2053178045 countsByYear W20531780452016 @default.
• W2053178045 countsByYear W20531780452017 @default.
• W2053178045 countsByYear W20531780452018 @default.
• W2053178045 countsByYear W20531780452020 @default.
• W2053178045 countsByYear W20531780452021 @default.
• W2053178045 countsByYear W20531780452022 @default.
• W2053178045 countsByYear W20531780452023 @default.
• W2053178045 crossrefType "journal-article" @default.
• W2053178045 hasAuthorship W2053178045A5049424223 @default.
• W2053178045 hasAuthorship W2053178045A5050734459 @default.
• W2053178045 hasConcept C120665830 @default.
• W2053178045 hasConcept C121332964 @default.
• W2053178045 hasConcept C122523270 @default.
• W2053178045 hasConcept C127313418 @default.

• next