During her last two years in office , President Aquino 's administration faced series of natural disasters and calamities . Among these were the 1990 Luzon earthquake , which left around 1,600 people dead and the 1991 volcanic eruption of what was then thought to be a dormant Mount Pinatubo , which was the second largest terrestrial eruption of the 20th century , killing around 300 people and causing widespread long-term devastation of agricultural lands in Central Luzon . The worst loss of life occurred when Tropical Storm Thelma ( also known as Typhoon Uring ) caused massive flooding in Ormoc City in November 1991 , leaving around 6,000 dead in what was considered to be the deadliest typhoon in Philippine history . Also in November 1987 , Supertyphoon Sisang slammed into Luzon killing almost 1,036 people and destroying farms and coastal villages , turning as the deadliest supertyphoon of the 20th century , and in October 1988 , Typhoon Unsang lashes out Central Luzon with scores of fatalities and tremendous damage , also in November 1990 , Supertyphoon Ruping struck into the Visayas leaving 784 lives lost due to flashfloods and landslides since the worst Typhoon Nitang in 1984 , and in October 1989 , it was Supertyphoon Tasing lashed into Northern Luzon with 47 people were also killed years before Supertyphoon Juan . A series of flashfloods struck the northern regions of Luzon resulted to the deaths of 36 persons when Typhoon Miding went slowly in August 1986 , it is the worst before Typhoon Pepeng happened in 2009 . It was also during Aquino 's term that the MV '' Doña Paz '' sank , which is the World 's worst peace-time maritime disaster of the 20th century . The disaster occurred in December 1987 which killed more than 1,700 people . A series of air disasters occurred in 1987 when Philippine Airlines PR 206 crashed into a mountain in Benguet with 50 passengers found dead on June 26 , another on December 13 , PR 443 crashes near Maria Cristina Airport in Iligan with 15 people on board were killed and on July 21 , 1989 , another plane crashed on a runway of the Ninoy Aquino International Airport , killing eight on ground
1990 Luzon earthquake
1990 Luzon earthquake
Presidency of Corazon Aquino