U.S. Geological Survey Open-File Report 02–109
U.S. Geological Survey Open-File Report 02–109
Modified Mercalli Intensities (MMI) for Some Earthquakes in Eastern North America (ENA) and Empirical MMI Site Corrections for Towns in ENA
By
W.H. Bakun,1 A.C. Johnston,2 and M.G. Hopper3
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1U.S. Geological Survey 345 Middlefield Rd., MS/977 Menlo Park, CA 94025 |
2CERI, University of Memphis 3876 Central Ave. Memphis, TN 38152 |
3U.S. Geological Survey 1711 Illinois St. Golden, CO 80401 |
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ABSTRACT Modified Mercalli Intensity (MMI) assignments for earthquakes in eastern North America (ENA) were used by Bakun et al. (submitted) to develop a model for eastern North America for estimating the location and moment magnitude M of earthquakes from MMI observations. MMI assignments for most of the earthquakes considered by Bakun et al. (submitted) are published. MMI assignments for 6 other earthquakes used by Bakun et al. (submitted) are listed in this report: November 18, 1755 near Cape Ann, Massachusetts; January 5, 1843 near Marked Tree, Arkansas; October 31, 1895 in southern Illinois; November 18, 1929 on the Grand Banks, Newfoundland; September 26, 1990 in southeast Missouri; and May 4, 1991 near Risco, Missouri. MMI empirical site corrections developed and used by Bakun et al. (submitted) are also listed in this report. |
CONTENTS
[Tables 1–7 are available as Adobe Portable Document Format (PDF) files. A free PDF reader is available from the Adobe Web site]
Explanation of tables 1–6: MMI assignments
Explanation of table 7: MMI site corrections
Table 1. MMI for November 18, 1755 earthquake near Cape Ann, Massachusetts (1-page PDF; 6 KB)
Table 2. MMI for January 5, 1843 earthquake near Marked Tree, Arkansas (2-page PDF; 8 KB)
Table 3. MMI for October 31,1895 earthquake in southern Illinois (9-page PDF; 23 KB)
Table 4. MMI for November 18, 1929 earthquake on the Grand Banks, Newfoundland (4-page PDF; 12 KB)
Table 5. MMI for September 26, 1990 earthquake in southeast Missouri (13-page PDF; 30 KB)
Table 6. MMI for May 4, 1991 earthquake near Risco, Missouri (5-page PDF; 13 KB)
Table 7. Empirical MMI site corrections for towns and cities in eastern North America (33-page PDF; 156 KB)
You can also view or download the entire report as a PDF file (304 KB).
For questions about the content of this report, contact Bill Bakun.
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