In the LANTEX17 exercise, a magnitude 8.8 earthquake in the eastern Atlantic is simulated. Located approximately 345 miles west southwest from Lisbon, Portugal and 510 miles west of the Straits of Gibraltar at 36.0ºN, 15.0ºW, the quake sends a tsunami towards the North American east coast. The National Oceanic and Atmospheric Administration (NOAA) and the U.S. National Tsunami Hazard Mitigation Program (NTHMP) are providing the framework for the LANTEX17 tsunami exercise, which is being conducted to assist tsunami preparedness efforts throughout the Atlantic region. Recent earthquakes and their associated tsunamis, such as those in Samoa (2009), Haiti (2010), Chile(2010, 2015), and Japan (2011)...