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A revised “earthquake report” questionaire

Earthquake Information Bulletin (USGS)
By: , and 

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Abstract

The U.S geological Survey is responsible for conducting intensity and damage surveys following felt or destructive earthquakes in the United States. Shortly after a felt or damaging earthquake occurs, a canvass of the affected area is made. Specially developed questionnaires are mailed to volunteer observers located within the estimated felt area. These questionnaires, "Earthquake Reports," are filled out by the observers and returned to the Survey's National Earthquake Information Service, which is located in Colorado. They are then evaluated, and, based on answers to questions about physical effects seen or felt, each canvassed location is assigned to the various locations, they are plotted on an intensity distribution map. When all of the intensity data have been plotted, isoseismals can then be contoured through places where equal intensity was experienced. The completed isoseismal map yields a detailed picture of the earthquake, its effects, and its felt area. All of the data and maps are published quarterly in a U.S Geological Survey Circular series entitled "Earthquakes in the United States".  

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title A revised “earthquake report” questionaire
Series title Earthquake Information Bulletin (USGS)
Volume 8
Issue 4
Year Published 1976
Language English
Publisher U.S Geological Survey
Description 5 p.
First page 18
Last page 22
Online Only (Y/N) N
Additional Online Files (Y/N) N