Abstract
Surface waves (at least the fundamental mode, see below) are the latest arrivals on the seismic record at a given epicentral distance. On classical records, they show up as longperiod oscillations, predominating in the record for shallow earthquakes and distances larger than a thousand kilometers. Their relative importance increases with the distance, which can be explained by their 2-dimensional propagation in a direction parallel to the surface of the Earth. Indeed they are guided waves with standing wave properties in a direction normal to this surface: along this direction the displacements are in phase at all depths. Thus their geometrical spreading, as guided waves, is less than that of body waves which propagate in 3 dimensions.
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© 1987 D. Reidel Publishing Company
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Jobert, N., Jobert, G. (1987). Ray tracing for surface waves. In: Nolet, G. (eds) Seismic Tomography. Seismology and Exploration Geophysics, vol 5. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3899-1_12
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DOI: https://doi.org/10.1007/978-94-009-3899-1_12
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-277-2583-7
Online ISBN: 978-94-009-3899-1
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