| 11. | Strong ground motions caused many secondary effects, including gas leaks and widespread soil liquefaction.
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| 12. | On a hard table, with a strong enough up-down ground motion, it might crack.
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| 13. | Some of the strongest ground motions ever recorded were recorded during the Northridge Earthquake.
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| 14. | This is especially suitable where the two structures may respond differently to ground motion.
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| 15. | Earthquake ground motion causes soil displacement known as free-field motion.
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| 16. | Magnitude measures a quake's total energy, as indicated by ground motion recorded on seismographs.
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| 17. | Earthquake magnitudes are measures of earthquake size calculated from ground motion recorded on seismographs.
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| 18. | This enables us to predict what ground motion might be like in a certain area.
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| 19. | Strong ground motions damage buildings, sometimes bringing about collapse.
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| 20. | IDA involves performing multiple ground motion records, each scaled to several levels of seismic intensity.
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