U. S. Geological Survey Open-File Report 99-23
U.S. Department of the Interior
U.S. Geological Survey
HYPOELLIPSE:
A Computer Program for Determining
Local Earthquake Hypocentral Parameters,
Magnitude, and First-Motion Pattern
(Y2K Compliant Version)
1999 Version 1.0
By John C. Lahr
Denver Federal Center
Box 25946, Mail Stop 966
Denver, CO 80225
(303) 273-8596
lahr@usgs.gov
U. S. Geological Survey Open-File Report 99-23, On-Line Edition
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Table of Contents
Chapter 1 -- Introduction to HYPOELLIPSE
Chapter 2 -- HYPOELLIPSE Users Guide
Chapter 4 -- Magnitude Determinations
Chapter 5 -- Determination of Vp/Vs Ratio
Chapter 6 -- Generating Travel-Time Tables
Chapter 7 -- Use of Cylindrical Delay Regions