Overview of the area[edit]
The location of Mount Pinatubo and the regional ash fallout from the 1991 eruption.
The volcano is 87 km (54 mi) northwest of Manila, the capital of the Philippines. Near Mount Pinatubo, the United States maintained two large military bases in the region. The U.S. Naval Base Subic Bay was 37 km (23 mi) south of Pinatubo, and the extent of Clark Air Base was just 14 km (8.7 mi) east of the volcano's summit.[10] The volcano's location on Luzon is in close proximity to about 6 million people.[11]