The U.S. territory of Guam is a small, 210-square-mile island in the western Pacific Ocean with a population of 169,000 residents. Guam is home to one of the harshest building environments in the world. The nearby subduction of one major tectonic plate under another along the Mariana Trench creates frequent and intense earthquakes. The resulting design spectral accelerations are similar in intensity to those present in more familiar earthquake hotspots like Los Angeles. Guam also finds itself situated in “Typhoon Alley,” an area of the western Pacific Ocean that experiences the highest frequency of tropical cyclones on earth, four times more active than similar areas in the Atlantic Ocean.