Talk:PlanetPhysics/Focal Depth

Original TeX Content from PlanetPhysics Archive
%%% This file is part of PlanetPhysics snapshot of 2011-09-01 %%% Primary Title: Focal Depth %%% Primary Category Code: 91.30.Px %%% Filename: FocalDepth.tex %%% Version: 1 %%% Owner: aerringt %%% Author(s): aerringt %%% PlanetPhysics is released under the GNU Free Documentation License. %%% You should have received a file called fdl.txt along with this file. %%% If not, please write to gnu@gnu.org. \documentclass[12pt]{article} \pagestyle{empty} \setlength{\paperwidth}{8.5in} \setlength{\paperheight}{11in}

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Focal depth is the distance between the \htmladdnormallink{Epicentre}{http://planetphysics.us/encyclopedia/Epicentre.html} and \htmladdnormallink{Hypocentre}{http://planetphysics.us/encyclopedia/Hypocenter.html} of an earthquake. It can be thought of as the $z$ coordinate of an earthquake location, assuming, as is usually the case, that the positive $z$ axis points into the earth.

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