The magnitude 8.8 earthquake offshore Chile today sent shockwaves across the globe. They were recorded on Arizona's broadband seismic monitors run by AZGS. At left is the is the record from the Snowflake AZ station (X18A).
At right is the Douglas AZ station (319A) near the border with Mexico. The event is on the 6:00 - 8:00 UMT time line.