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Errata
Errata
The following is the correct version of an abstract published in Seismological Research Letters58, 104–105. QUANTIFICATION OF DIFFERENCES IN ATTENUATION OF MODIFIED MERCALLI INTENSITY BETWEEN EASTERN AND WESTERN NORTH AMERICA - PRELIMINARY RESULTS SIBOL, M.S. and BOLLINGER, G.A., Seismological Observatory, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061 Most studies of the attenuation of Modified Mercalli Intensity (MMI) develop models between MMI and distance using isoseismal maps. Distances are determined to be either the average epicentral distance to an isoseismal contour (e.g. Anderson, 1978), or the area within a given contour is measured and the radius of a circle of equivalent radius is used (e.g. Howell and Schultz, 1975). This study employs individual epicenter to MMI report site distances (R) from over 100 earthquakes (Imax ≥ VI) in the U.S. and southern Canada (south of 55°N). Such a parameterization allows for a quantitative estimate of the mean response and the specification of error for the fall-off of intensity with distance; thereby making direct regional comparisons possible.
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