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TitleRadiation pattern of Rayleigh waves from the southeast Alaska earthquake of July 10, 1958
DownloadDownload (whole publication)
AuthorBrune, J N
SourceA symposium on earthquake mechanism; by Hodgson, J H (ed.); Publications of the Dominion Observatory vol. 24, no. 10, 1961 p. 373-383,
PublisherCanada Department of Mines and Technical Surveys (Ottawa, Canada)
MeetingInternational Union of Geodesy and Geophysics, Association of Seismology and Physics of the Earth's Interior, Twelfth General Assembly; Helsinki; FI; 1960
Mediapaper; on-line; digital
RelatedThis publication is contained in Hodgson, J H; (1961). A symposium on earthquake mechanism, Publications of the Dominion Observatory vol. 24 no. 10
File formatpdf
AreaAlaska; Lituya Bay; United States
Lat/Long WENS-140.0000 -137.0000 59.0000 58.0000
Subjectsgeophysics; tectonics; mathematical and computational geology; seismology; earthquakes; earthquake mechanisms; seismic waves; r waves; p waves; faults; crustal movements; Alaska earthquake of July 10, 1958; Alaska Earthquake of July 10, 1958; methodology; amplitude
Illustrationsseismograms; graphs; tables; rose diagrams; schematic representations
Natural Resources Canada Library - Ottawa (Earth Sciences)
Released1961 01 01; 2018 11 19
AbstractLong-period Rayleigh wave data obtained during the IGY are used in this paper to measure the initial phases and amplitudes of Rayleigh waves as a function of azimuth for the Southeast Alaska earthquake of July 10, 1958.
This study indicates that the radiation pattern bears a simple relation to the fault motion, showing four sectors of initial phase and a four-lobed pattern of amplitudes. The symmetry of the radiation pattern is in agreement with the motion on the fault as determined by a fault.-plane solution and by field observation of the direction of faulting. The symmetry differs radically from that expected from explosions. It is concluded that this simple technique can be used to study focal mechanism from surface wave data for most of the larger earthquakes when instrumentation is improved and regional variations in phase velocity for shorter periods are known.