El Salvador lies along the Pacific Ring of Fire and is thus subject to significant tectonic activity, including frequent earthquakes and volcanic activity. The capital San Salvador was destroyed in 1756 and 1854, and it suffered heavy damage in the 1919, 1982, and 1986 tremors. Recent examples include the earthquake on 13 January 2001 that measured 7.7 on the Richter magnitude scale and caused a landslide that killed more than 800 people; and another earthquake only a month later, on 13 February 2001, that killed 255 people and damaged about 20% of the country's housing. A 5.7 Mw earthquake in 1986 resulted in 1,500 deaths, 10,000 injuries, and 100,000 people left homeless.