M 7.0, M L 6.96. M 6.9, M L 6.99.

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M 7.0, M L 6.96

M 6.9, M L 6.99

See Wen et al., Why 1G Was Recorded at TCU129 Site During the 1999 Chi- Chi, Taiwan, Earthquake, Bull. Seismol. Soc. Am. 91,

Look for these things as a function of period P1 vs P2 magnitude scaling Site effects (pay particular attention to points beyond 300 km, some of them in the Taipei and Lanyang basins) Distance function (look at variations along line L2 in the Longitudinal Valley) Scatter The lines are the same for both events The scale of the ordinates of each graph is the same (for both events and for all periods)

What can we say about Site effects Distance function Scatter