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Magnitude 7.7 Earthquake

Average = 0.4 g Sediments amplify shaking ~200%.

Average = 0.4 g Sediments amplify shaking ~200%. Average = 0.5 g Sediments deamplify slightly.

Average = 0.4 g Sediments amplify shaking ~200%. Average = 0.5 g Sediments deamplify slightly. Average = 0.4 g Sediments only amplify very slightly.

Probabilistic Ground Motion Posters Probabilistic ground motion maps (2% and 10% chance of exceedance in 50 y; PGA, 0.2 sec, 1.0 sec) Probabilistic ground motion maps (2% and 10% chance of exceedance in 50 y; PGA, 0.2 sec, 1.0 sec)

What do the sediments do?

What do the sediments do? Reduce shaking levels ~30% & make them more uniform. Reduce shaking levels slightly& make them more uniform.

What do the sediments do? Reduce shaking levels ~30% & make them more uniform. Increase shaking levels ~100%. Reduce shaking levels slightly& make them more uniform.

Liquefaction Maps From G. Rix & S. Romero, Georgia Tech

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