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MULTIPLE EVENTS IN REFRACTION SHOOTING *
Author(s) -
MEISSNER R.
Publication year - 1965
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1965.tb01953.x
Subject(s) - seismogram , refraction , reflection (computer programming) , geology , amplitude , seismology , optics , travel time , geophysics , geodesy , physics , computer science , programming language , engineering , transport engineering
A description and classification is given for those later events in seismograms of refraction–and wide angle reflection shooting which travel nearly parallel and at constant time intervals behind the first arrivals and which are frequently observed in field surveys. Multiple events with the velocity V 1 of the uppermost layer may be caused by multiple P ‐reflections and certain velocity conditions or by PS ‐conversions. In addition to these types multiple events with the velocity V 2 or V n may be caused by reflected refractions or by reflected diving waves. The different types will be distinguished mainly by means of travel time–and amplitude‐considerations.