Tuesday, September 21, 1999, 1:47 a.m. local time
Learn earthquake basics in Earthquakes 101.
Aftershocks: Two aftershocks of 6.8 and 6.1 magnitude struck on Wednesday, September 22, in addition to the thousands that shook the region shortly after the earthquake. There were concerns of a tsunami for Taiwan, Japan, the Philippines, Yap, Guam, and Palau.
Casualties: as of Wednesday, September 22, more than 1,800 people were dead and another 4,000 were injured.
Last major quake: 13 years ago, on November 14, 1986. A magnitude 7.8 quake killed 15 people.