Open AccessDistance Corrections for Deep Focus Earthquakes
Author(s) -
Buchbinder Goetz G. R.
Publication year - 1969
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1969.tb02320.x
Subject(s) - focus (optics) , geology , surface (topology) , geodesy , seismology , amplitude , travel time , deep focus earthquake , depth of focus (tectonics) , great circle , surface wave , geometry , optics , mathematics , physics , tectonics , subduction , engineering , transport engineering
Summary Distance and time corrections for PcP , PKP and P phases with small angles of emergence are determined. The distance corrections permit extension of a ray path from the observing station through the source to the surface. This results in surface focus distances for the phases which permits more consistent comparison of amplitudes for phases from earthquakes at different depths. Application of the corresponding time corrections results in a surface focus travel‐time curve.