Guam Highway 1
Guam Highway 1 (GH-1), also known as Marine Corps Drive, is one of the primary automobile routes in the United States territory of Guam. It runs in a southwest-to-northeast direction, from the main gate of Naval Base Guam in the western community of Santa Rita in a general northeasterly direction to the main gate of Andersen Air Force Base in the community of Yigo. It passes through Guam's capital, Hagåtña, as well as intersecting various other territorial highways. Along its route, the highway runs through tropical forest areas, urbanized commercial areas, and residential neighborhoods. The US Military built the road starting in 1941. Construction ceased with the Japanese invasion in December 1941 and resumed in 1944. The highway was formally dedicated to the US Marines by the territorial governor in 2004.
Guam
The Mariana chain of which Guam is a part was created by collision of the Pacific and Philippine Sea tectonic plates. Guam is the closest land mass to the Mariana Trench, the deep subduction zone that runs east of the Marianas. Due to its location on the Mariana Plate just westward of where the Pacific Plate subducts the Mariana and the Philippine Sea Plates, Guam occasionally experiences earthquakes. In recent years, most with epicenters near Guam have had magnitudes ranging from 5.0 to 8.7. Unlike Anatahan in the Northern Mariana Islands, Guam is not volcanically active, though vog (volcanic smog) from Anathan affects it due to proximity.