United States Earthquakes, 1979 Open-File Report 84-979 Prepared
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DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY United States Earthquakes, 1979 By Carl W. Stover and Carl A. von Hake Open-File report 84-979 Prepared in cooperation with National Oceanic and Atmospheric Administration, This report has not been reviewed for conformity with U.S. Geological Survey editorial standards. 1984 Contributors Contributors to this publication are listed below according to the information furnished or service performed: Hypocenters and magnitudes: W. LeRoy Irby, U.S. Geological Survey Reino Kangas, U.S. Geological Survey John H. Minsch, U.S. Geological Survey Russ Needham, U.S. Geological Survey Waverly J. Person, U.S. Geological Survey Bruce W. Presgrave, U.S. Geological Survey Robert Y. Koyanagi, Hawaiian Volcano Observatory, U.S. Geological Survey Intensities: Carl U. Stover, U.S. Geological Survey Robert Y. Koyanagi, Hawaiian Volcano Observatory, U.S. Geological Survey Network Operations (by institution): University of Alaska University of California, Berkeley California Institute of Technology Hawaiian Volcano Observatory, U.S. Geological Survey Kansas Geological Survey University of Kansas Lament-Doherty Geological Observatory, Columbia University University of Minnesota Oklahoma Geological Survey St. Louis University Virginia Polytechnic Institute and State University University of Washington Weston Observatory, Boston College Geodesy: Sandford R. Holdahl, NOAA, NOS, National Geodetic Survey Richard A. Snay, NOAA, NOS, National Geodetic Survey Tsunamis: Mark G. Spaeth, NOAA, National Weather Service Strong-motion seismograph data: Ronald L. Porcella, U.S. Geological Survey Editorial assistance and manuscript preparations: Paula K. Smith, U.S. Geological Survey III Contents Page Contributors.............................................................ill Introduction............................................................. 1 Discussion of Tables................................................ 1 Epicenter and Isoseisnal Maps....................................... 1 Earthquake Information Services..................................... 3 Magnitude and Intensity Ratings..................................... 3 Modified Mercalli Intensity Scale................................... 5 Collaborators....................................................... 7 Earthquake Descriptions.................................................. 8 Alaska.............................................................. 8 Arizona............................................................. 16 Arkansas............................................................ 16 California.......................................................... 17 California Off the coast........................................... 55 Colorado............................................................ 56 Connecticut......................................................... 57 Georgia............................................................. 57 Hawaii.............................................................. 57 Idaho............................................................... 64 Kansas.............................................................. 64 Kentucky............................................................ 64 Maine............................................................... 65 Massachusetts....................................................... 68 Missouri............................................................ 68 Montana............................................................. 68 Nebraska............................................................ 69 Nevada.............................................................. 69 New Hampshire....................................................... 71 New Jersey.......................................................... 72 New Yo rk............................................................ 73 North Carolina...................................................... 73 Ohio................................................................ 73 Oklahoma............................................................ 73 Oregon.............................................................. 74 Pennsylvania........................................................ 74 Puerto Rico......................................................... 74 South Carolina...................................................... 75 Tennessee........................................................... 76 Texas............................................................... 77 Utah................................................................ 77 Vermont............................................................. 77 Washington.......................................................... 78 West Virginia....................................................... 7 9 Wyoming............................................................. 79 Network Operations....................................................... 106 Alaska Earthquakes, 1979............................................ 106 Northern and Central California Earthquakes, 1979...................106 Southern California Earthquakes, 1979...............................108 Hawaii Earthquakes, 1979............................................109 Kansas Earthquakes, 1979............................................ 114 Minnesota Earthquakes, 1979......................................... 115 Central Mississippi Valley Earthquakes, 1979........................116 Nebraska Earthquakes, 1979.......................................... 117 New England Earthquakes, 1979....................................... 120 Earthquakes in New York State and Adjacent Areas, 1979..............121 Oklahoma Earthquakes, 1979.......................................... 122 Southeastern United States Earthquakes, 1979........................124 Washington Earthquakes, 1979........................................125 Miscellaneous Activities................................................. 127 Crustal Movement Studies............................................ 127 Tsunamis............................................................ 128 Principal Earthquakes of the World.................................. 129 Strong-Motion Seismograph Data........................................... 134 Introduction........................................................134 Accelerograph Data..................................................135 References...............................................................169 LIST OF TABLES Table Page 1 Summary of U.S. earthquakes for 1979................................ 81 2 Kansas earthquakes, 1979............................................114 3 Station locations for the Central Minnesota Seismic Array...........115 4 1979 Minnesota earthquakes recorded by the Central Minnesota Seismic Array...............................................................115 5 Nebraska earthquakes, 1979.......................................... 120 6 Oklahoma earthquake catalog for 1979................................124 7 Southeastern United States earthquakes, 1979........................125 8 Principal earthquakes of the world during 1979......................130 9 Summary of U.S. accelerograph records recovered during 1979.........151 LIST OF ILLUSTRATIONS Figure Page 1 Earthquake epicenters in the conterminous United States for 1979.... 2 2 Earthquake epicenters in Alaska for 1979............................ 2 3 Earthquake epicenters in Hawaii for 1979............................ 3 4 Plot of earthquakes in the conterminous United States that were felt or caused damage in 1979............................................ 4 5 Plot of earthquakes in Alaska that were felt or caused damage in 1979................................................................ 4 6 Plot of earthquakes in Hawaii that were felt or caused damage in 1979................................................................ 5 vi 7 Isoseismal map for the St. Ellas earthquake of 28 February 1979..... 11 8 Isoseismal map for the southern California earthquake of 1 January 1979................................................................ 18 9 Isoseismal map for the southern California earthquake of 12 February 1979................................................................ 22 10 Isoseismal map for the northern California earthquake of 22 February 1979................................................................ 23 11 Isoseismal map for the southern California earthquake of 15 March 1979................................................................ 24 12 Isoseismal map for the central California 'earthquake of 28 April 1979................................................................ 27 13 Isoseismal map for the central California earthquake of 8 May 1979.. 28 14 Isoseismal map for the southern California earthquake of 29 June 1979................................................................ 30 15 Isoseismal map for the southern California earthquake of 30 June 1979................................................................ 31 16 Isoseismal map for the central California earthquake of 6 August 1979................................................................ 34 17 Isoseismal map for the Imperial Valley, California earthquake of 15 October 1979..................................................... 42 18 Photograph of damage to the Imperial County Services Building in Imperial, Calif..................................................... 45 19 Support pillar failure at the east end of the Imperial County Services>Building