United States EarthquakesU.S. Department of the Interior, Geological Survey, 1969 - Earthquakes |
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accelerograph record aftershocks Alluvium Angeles Subway Terminal April Basement accelerograph Berkeley Bldg Boulder Dam building bushes shaken Cape Mendocino chimneys City clocks stopped Coast and Geodetic Damage slight December 24 Depth normal displacement earthquake East-west Fairbanks February Ferndale frightened furnishings moved Geodetic Survey Hanging objects swung Helena Hollister Hollywood Storage Honshu Island Huntington Beach Imperial Valley Imperial Valley earthquake January July Lake Light shock felt Long Beach Los Angeles March Maximum intensity Mercalli intensity scale Moderate shock Mont motion lasted Mountain Northeast November objects and furnishings October Pacific Pasadena Pendulum clocks plaster cracked Probable epicenter region reported felt residents awakened Rossi-Forel scale San Bernardino San Diego San Francisco Santa Seconds seismograph Seismological September Serial Slight damage Slight shock small objects moved South Southeast Southern California southwest square miles strong-motion records strong-motion seismograph Subway Terminal building Trees and bushes Up-Down Vertical Walls creaked waves