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Krakatau volcano
Caldera 813 m (2,667 ft.) / Anak Krakatau: 189 m
Sunda Strait, Indonesia, -6.1°S / 105.42°E
Current status: minor activity or eruption warning (3 out of 5)
Krakatau webcams / live data | Reports
Krakatau volcano videos
Krakatau volcano books | Tours
Krakatau volcano eruptions:
1530, 1680-81, 1684, 1883 (Plinian eruption), 1927-30, 1931-32, 1932-34, 1935, 1936, 1937, 1938-40, 1941, 1942, 1943, 1944, 1945, 1946, 1946-47, 1949, 1950, 1952, 1953, 1955, 1958-59, 1959-63, 1965(?), 1969(?), 1972-73, 1975, 1978, 1979, 1980, 1981, 1988, 1992-93, 1994-95, 1996, 1997, 1999, 2000, 2001, 2007-8, April 2009-early 2010, Oct 2010 - March 2011, July-Oct 2011, Jan-May + Sep 2012, 2015(?), 2017, 2018 (22 Dec eruption & tsunami)
Typical eruption style:
Explosive. Construction of a cinder cone  island (Anak Krakatau) inside the caldera formed by the 1883 eruption. Frequent strombolian activity.
Last earthquakes nearby
Krakatau volcano tours
From Krakatau to Bali (16-days study and photo tour to Java, Indonesia)
A Dream Come True - World Volcano Tour (4 weeks round-the-world trip to Hawai'i - Vanuatu - New Zealand - Indonesia)
Krakatau Volcano Special (expedition to study & observe Anak Krakatau volcano and its activity)

Latest satellite images

Sentinel hub | Landsat 8
 

Krakatoa (Krakatau) volcano news & eruption updates:

Krakatoa volcano update: What caused the tsunami?

Monday Dec 24, 2018 14:58 PM | BY: T

The triggering cause of Saturday's tsunami is still being discussed. A common and likely interpretation is a landslide, which could have been caused by either, or a combination of:
- a slide simply caused by the weight of rapidly accumulated new lava material on the flanks, both above and below water
- a sudden lateral blast caused by an explosion as magma rising could not be released quickly enough from the established summit vent.
It is also unclear how much of the island disappeared by the initial event and how much crumbled away during the following erosion by eruption and adjustments by gravity.
A sketch published on twitter illustrated the version implying a larger lateral blast:
This picture explains how the Indonesia volcanic tsunami was generated. Many volcanic eruptions cannot generate tsunami. The Krakatoa volcanic mass should have been very large; probably a volume of a few kilometers cubed #IndonesiaTsunami #Krakatoa #Tsunami #Indonesia pic.twitter.com/lQCx3yrAgg— Dr Mohammad Heidarzadeh (@Mo_Heidarzadeh) December 23, 2018


A smaller version - without flank collapse, fortunately (or the video and people involved would not exist any more) - was filmed in Oct by Ronny, one of our participants on the Krakatau Volcano Special tour: (you have to watch carefully where the eruption starts):
Previous news

Monday, Dec 24, 2018
If you like to send a small donation for the victims of the Dec 2018 tsunami in Java (Indonesia), we are providing a direct channel to do so: we collect donations through our PayPal account and forward this money direct to our local expedition leader Andi who delivers this money directly to affected people in need through his organization ITGA / HPI. [more]

Sunday, Dec 23, 2018
On this special news page, we will collect information and updates and add them on top of the stack as news come in about the Krakatoa eruption and tsunami on 22 Dec 2018. [more]
Steam and ash explosions at Krakatau seen this morning (Image: Dicky Adam Sidiq/kumparan)
Sunday, Dec 23, 2018
First visual information about the situation on Anak Krakatau island group itself has come in, revealing that a large part of Anak Krakatau's SW flank has collapsed, which most likely is the trigger for last night's tsunami. ... [more]

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