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TitleCharts for measuring azimuth and distance and for tracing seismic rays through the Earth
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AuthorWillmore, P L; Hodgson, J H
SourcePublications of the Dominion Observatory vol. 16, no. 14, 1955, 10 pages (4 sheets), https://doi.org/10.4095/311142
Year1955
PublisherCanada Department of Mines and Technical Surveys (Ottawa, Canada)
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
Subjectsgeophysics; seismology; seismic waves; mantle; methodology; azimuth; distance; error analysis
Illustrationsstereonet projections; charts; tables; graphs; schematic representations; cross-sections
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Location
 
Natural Resources Canada Library - Ottawa (Earth Sciences)
 
Released1955 01 01; 2018 10 09
AbstractThe paper presents two charts which are of help in seismology. With the aid of the first chart the distance between any two points on the earth and their relative azimuths can be determined with an accuracy sufficient for most seismological problems. The second chart enables one to trace rays through the earth's mantle, and is of help in studies which involve the relationship between depth of penetration and point of emergence. It is used to exhibit a complicated cusp arrangement associated with the phase pP.
GEOSCAN ID311142