Friday, March 27, 2009

Quick Facts #3

Chemicals in the magma- silica, aluminium, potassium, sodium, and calcium, forming a polymerized liquid rich in feldspar and quartz.
The most recent eruption was in late 2008

Wednesday, March 25, 2009

Anak Krakatau

Anak Krakatau is "the child of Krakatau" that rose from the sea floor. It first appeared to have broken the surface in 1927. It's 500 meters high and has been rising for over 50 years. Each year it grows an average of 6 meters. It is currently about 200 meters above sea level and has a diameter of 2 kilometers.

Quick Facts #2


The sound of the eruption is thought to be the loudest sound in recorded history

The sound was heard 3,000 miles away in Mauritius

Nine Tsunamis were generated due to the explosion. Some of these were believed to be as high as 100 feet

The waves could throw coral blocks weighing 600 tons on shore

1,000 people were killed during a rainfall of hot ash

Due to ash covering the sun, the temperature dropped 1.2 degree C below normal. It returned to normal in 1888

The explosion was equal to 3,000 atomic bombs

Quick Facts #1

Type of volcano- Stratovolcano/ Caldera

T ype of Crust- Oceanic

Country- Indonesia

Nearby cities- Verlaten, Lang islands

Most famous eruption- 1883

Vents/Craters/ Dome?- Vents

Neighboring volcanos- Rakata, Danan, Perbawwatan

Eruption Style- Very explosive and Frequent

Lava Type- Basaltic

Hazards- Pyroclastic flows, Debris, Tsunamis

Height- 2,000 meters

Radius- 9 km

Last eruption- 2008

Summit elevation- 813 meters

Monday, March 23, 2009

Eruption of 1883

On May 10th, 1883, reports began to come in of clouds of ash 11 kilometers high above Krakatau in Indonesia. These clouds lasted for about two months. These clouds of ash actually impressed the locals, but the volcanoe was about to erupt. The volcanoe finally erupted August 26th, 1883 until August 27th. The eruption was one of the worst in history. The northern two-thirds of the island collapsed, generating a series of pyroclastic flows and large tsunamis. 36,417 people died in the eruption. The eruption had a V.E.I of 6, which is equivalent to 200 megatons of TNT.

Anak Krakatau

Anak Krakatau
The Child of Krakatau

Our sources

Unknown. "Krakatau." Global volcanism report. 13 Jan. 2007. Smithsonian institute. 23 Mar. 2009 .

"Krakatau." Krakatau, Sunda Strait, Indonesia. Ed. UnknowVoyages autour du Monden. 3 Apr. 1997. Oregon State. 23 Mar. 2009 .

"How Volcanoes work." KRAKATAU, INDONESIA (1883). 23 Mar 2009 .

Erickson, Jon. Volcanoes and Earthquakes. Blue Ridge Summit: TAB Books Inc., 1988.

Google Earth Image

Google Earth Image