Title |
Comment |
Keywords |
Early Earthquake Detection Instruments
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08:31 - 09:35 (01:04) / 1.2 MB
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"James Sadd", earthquake, seismograph, China, "initial ground motion", vibration, "duplex pendulum", "San Francisco Earthquake", strength, duration, epicenter
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Types of Ground Vibrations
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13:44 - 14:21 (00:37) / 2.1 MB
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earthquake, "wave period", "natural period", vibration, "primary wave", "secondary wave", "surface wave", "ground motion", epicenter
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Geology School Keywords
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