Only reported earthquakes with magnitudes of 2.5 or above or intensities of II or above are listed below. In addition, all historic earthquakes are not listed, as records of their occurrences have not yet been discovered. For example, there have undoubtedly been more earthquakes in the Yellowstone National Park area than are shown on this list. As old records and newspapers are examined, more earthquake accounts will be found.
Year: Year that earthquake occurred Mth: Month that earthquake occurred Day: Day that earthquake occurred (UTC Time) Time: Universal Time Coordinated (UTC) Time *: Earthquake occurred on previous day, Mountain Time Lat: Latitude of epicenter Long: Longitude of epicenter mb: Body-wave magnitude Ms: Surface-wave magnitude Mag: Magnitude from other scale Scale: Other magnitude scale used MD = Coda-length magnitude MI = Magnitude derived from epicentral intensity ML = Local (Richter) magnitude Mw = Moment magnitude UK = Unknown magnitude scale Mag: same as above Scale: same as above Intensity: Maximum reported intensity Explo: Was source of earthquake an explosion? E = Explosion N = Non-tectonic event Blank Space = Tectonic event Source: Sources used by U. S. Geological Survey plus other sources ABE = Catalog of large earthquakes, 1897-1980 from Abe (1981, 1982, 1984); Abe and Kanamori (1979); and Abe and Noguchi (1983a, b). BCIS = Catalog of earthquakes listed in the publications of the Bureau Central International Seismologique (BCIS) for 1935, 1950-1975. File supplied by NOAA (Rinehart and others, 1985). BDA = Catalog of large earthquakes, 1897-1977, compiled by Bath and Duda (1979). File supplied by NOAA (Rinehart and others, 1985). DNAG = Catalog of North American earthquakes, 1534-1985, compiled for the Decade of North American Geology (Engdahl and Rinehart, 1991). EPRI = Catalog of earthquakes of the United States east of the Rocky Mountains, 1627-1985, compiled by the Electric Power Research Institute. ISS = Epicenters listed in the International Seismological Summaries, 1913-1963. P&S = World-wide seismic moment catalog of earthquakes, 1900-1989 (Pacheco and Sykes, 1992) PDE = U. S. Geological Survey's Preliminary Determination of Epicenters - Monthly Listing. SRA = Catalog of earthquakes occurring in the eastern, central, and mountain states of the United States, 1534-1986 (Stover and others, 1984). USHIS = Catalog of principle earthquakes in each of the 50 states in the United States, 1568-1989 (Stover and Coffman, 1993). UU = Catalog of earthquakes compiled by the University of Utah Seismograph Stations, 1850-1985. Listing through June 1978 by Arabasz and others (1979). WSGS = Data from earthquake record compiled by the Wyoming State Geological Survey.References
Abe, K., 1981, Magnitudes of large shallow earthquakes from 1904 to 1980: Physics of the Earth and Planetary Interiors, v. 27, p. 72-92. Abe, K., 1982, Magnitude, seismic moment and apparent stress for major deep earthquake: Journal of the Physics of the Earth, v. 30, p. 321-330. Abe, K., 1984, Complements to "magnitudes of large shallow earthquakes from 1904 to 1980": Physics of the Earth and Planetary Interiors, v. 34, p. 17-23. Abe, K., and Kanamori, H., 1979, Temporal variation of the activity of intermediate and deep focus earthquakes: Journal of Geophysical Research, v. 84, no. 87, p. 3589-3595. Abe, K., and Noguchi, S., 1983a, Determination of magnitude for large shallow earthquakes 1898-1917: Physics of the Earth and Planetary Interiors, v. 32, p. 45-59. Abe, K., and Noguchi, S., 1983b, Revision of magnitudes of large shallow earthquakes 1897-1912: Physics of the Earth and Planetary Interiors, v. 33, p. 1-11. Arabasz, W.J., Smith, R.B., and Richins, W.D., 1979, Earthquake studies in Utah 1850-1978: University of Utah Seismograph Stations, Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, 84112, 552p. Bath, M., and Duda, S.J., 1979, Some aspects of global seismicity: Report No. 1-79, Seismological Institute, Uppsala, Sweden, 41p. Case, J.C., 1993, Geologic Hazards in Wyoming: Wyoming Geo-notes, no. 40, p. 46-48. Case, J.C., Larsen, L.L., Boyd, C.S., and Cannia, J.C., 1995, Earthquake epicenters and suspected active faults with surficial expression in Wyoming: Wyoming State Geological Survey Geologic Hazards Section Interim Report No. 2, scale 1:1,000,000. Engdahl, E.R., and Rinehart, W.A., 1991, Seismicity map of North America, in Slemmons, D.B., Engdahl, E.R., Zoback, M.D., and Blackwell, D.D. (eds.), "Neotectonics of North America": Boulder, CO, The Geological Society of America, Decade Map Volume 1, 21-27. Pacheco, J.F., and Sykes, L.R., 1992, Seismic moment catalog of large shallow earthquakes, 1900 to 1989: Bulletin of the Seismological Society of America, v. 82, no. 3, p. 1306-1349. Rinehart, W., Meyers, H., and von Hake, C.A., 1985, Summary of earthquake data base: Key to Geophysical Records Documentation No. 21, U.S. Department of Commerce, National Geophysical Data Center, Boulder, CO, October 1985. Stover, C.W., Reagor, G., and Algermissen, S.T., 1984, United States earthquake data file: U.S. Geological Survey, Open-File Report 84-225, 123p. Stover, C.W., and Coffman, J.L., 1993, Seismicity of the United States, 1568-1989 (revised): U.S. Geological Survey, Professional Paper 1527, 418p.