The most serious earthquake in terms of loss of life was the 1906 San Francisco earthquake and fire that killed an estimated 700 people. Only 4 other earthquakes in United States territory have killed more than 100 people: 173 people died in Unimake Island, Alaska, in 1946; 131 died in Prince William Sound, Alaska, in 1964; 120 died in Long Beach, California in 1933; and 116 died in Mona Passage, Puerto Rico, in 1918. More recent earthquakes continue to exact smaller but significant tolls: 64 died in the 1971 San Fernando earthquake; 67 died in the 1989 Loma Prieta earthquake; and most recently, 60 died in the 1994 Northridge, California, earthquake (8-10) (Table 8--2).