The Tierra Blanca Joven eruption of Lake Ilopango was the largest volcanic eruption in El Salvador during historic times with a Volcanic Explosivity Index of 6, dating back in the mid 5th century A.D. The eruption ejected about 43.7 cubic kilometres (10.5 cu mi) of dense rock equivalent. The eruption was one of the largest volcanic events on Earth in recorded history, i.e. within the last 7,000 years. The possible date of the eruption was 431 AD and the eruption is considered a possible source of extreme weather events of 535-536.