AMS event 270-2017 generated a sonic boom that was recorded at 9:12:06 UT on 25 January 2017 at seismic station CO.BIRD in Birdtown, Kershaw, SC (34.645 N, 80.4615 W). It was also recorded (much less strongly) by N4.Y57A in Sumter, SC (34.017 N, 80.3915 W) at 9:14:19 - 2 minutes 13 seconds later. These two seismic stations are 70 km apart, suggesting the terminus was between the two of them and about 40 km closer to CO.BIRD than to N4.Y57A. --Rob
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