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USGS CMG InfoBank Geology School: natural period

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Title Comment Keywords
Types of Ground Vibrations 13:44 - 14:21 (00:37) / 2.1 MB earthquake, "wave period", "natural period", vibration, "primary wave", "secondary wave", "surface wave", "ground motion", epicenter
Natural Periods of Structures During Earthquakes 14:21 - 15:21 (01:00) / 1.5 MB "Mexico City", earthquake, "natural period", "surface wave"
Geology School Keywords
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URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/keypage/natural_periodnc.html
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Page Last Modified: Tue Feb 5 05:13:07 PST 2013  (chd)