Zambales: Mount Pinatubo Eruption

Ash from Mount Pinatubo covers Naval Station Subic Bay.
 
June 15, 1991 was a memorable date in Olongapo. Mount Pinatubo, 20 mi (32 km) from the city, violently erupted with a force 8 times greater than the May 1980 eruption of Mount St. Helens. Volcanic clouds blocked out the sun. Volcanic earthquakes and heavy muddy rain, as well as thunderstorms from a typhoon passing over Central Luzon made Black Saturday a 36-hour nightmare.This caused widespread damage to all of Zambales municipality including Olongapo City.