Open-file Report, Issues 81-89The Department, 1981 - Geology |
Common terms and phrases
acre feet America Bulletin area of rupture ash eruption ash fall base of small Bezymianny Cascades Cenozoic Columbia River Conference on Earthquake conservative Cowlitz River Crandell and Mullineaux debris deformation dynes/cm² Earthquake Engineering earthquake magnitude Electric Company equation estimates Farallon Plate Figure flood FSAR geologic record Geological Society Geological Survey Open-File Geophysical Research ground motion Helens Seismic Zone Journal of Geophysical Joyner Kanamori and Anderson km³ Lake lateral blast Lewis River maximum acceleration maximum credible event maximum possible earthquake maximum possible quake Mount St mudflows Mullineaux 1978 North American Plate occur Pacific Pacific Plate Peak horizontal plate tectonic Portland General Electric precursors present eruptive cycle Puget Sound pyroclastic flows recorded at base recurrence frequency curve region rock seismic activity seismic moment Seismological Society slipped fault small structures Society of America stress drop Survey Open-File Report Swift Reservoir Table Toutle River U.S. Geological Survey vent Washington