In this question, the arrivals of the P and S waves are marked. When (according to the x axis) did the P waves first arrive at this recorder (APPROXIMATELY)? Loma Prieta recorded at KEV (Kevo, Firiand) KEV LHZ OCT 18 (291), 1989 00:04:15.240 200- -200- Surface waves X 1042 Time (Seconds from 00:04:15 ur) 04:10:10 04:15:20 04:15:12 04:15:25 Ground Displacement (microns)

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