Krakatoa - 1883

  • the volcano was on a 9 km long island rising to 2,600 feet above sea level
  • on May 20th the volcano began to erupt with a series of large explosions
  • smaller explosions continued through June and July
  • ot 10 am on August 27th the volcano exploded with a force 5000 times greater than the Hiroshima atomic bomb explosion
  • the blast could be heard 4,800 km (3000 miles) away
  • tsunamis slammed into coastal towns killing 36,000 people
  • near the volcano, a layer of ash up to 40 meters thick accumulated
  • Krakatoa was gone, replaced by a submarine caldera 300 m deep







Coral block (c. 1885) thrown onto the shore of Java after the eruption



  • In the year following the 1883 Krakatoa eruption, average Northern Hemisphere summer temperatures fell by as much as 1.2 °C (2.2 °F).
  •  Weather patterns continued to be chaotic for years, and temperatures did not return to normal until 1888.
  • The record rainfall that hit Southern California during the “water year” from July 1883 to June 1884 – Los Angeles received 38.18 inches (969.8 mm) and San Diego 25.97 inches (659.6 mm) – has been attributed to the Krakatoa eruption