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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)
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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.
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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)

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Krakatoa (Krakatau) volcano news & eruption updates:

Krakatau volcano (Indonesia): continuing occasional explosions, field observations 15-17 Aug 2019

Monday Aug 19, 2019 16:20 PM | BY: T

The crater lake of Anak Krakatau as observed on 15 or 16 Aug 2019 (image: Stefan Tommasini / facebook)
The crater lake of Anak Krakatau as observed on 15 or 16 Aug 2019 (image: Stefan Tommasini / facebook)
Heat signals from Krakatau volcano as detected with the MODIS sensor from satellite over the past months (image: MIROVA)
Heat signals from Krakatau volcano as detected with the MODIS sensor from satellite over the past months (image: MIROVA)
Two small explosions, probably phreatic (steam-driven), were recorded from the volcano during the past few days, one on 17 Aug at 20:23, the next one earlier today at 09:09 local time.
Due to intense haziness in the area, the eruptions were only inferred from seismic signals; no visual observations were made at the observatory. Each of them lasted about 1 minute and were relatively small.
During 15-17 Aug, a small group of VolcanoDiscovery visited the island during our most recent expedition to Krakatau and observed the crater lake, where expedition members Anke Reimer and Stefan Tommasini visited the lake. Anke made some interesting temperature measurements at the crater lake of Anak Krakatau:
The water temperature was 62 degrees Celsius near the shore, probably more (around 80 deg C) in the middle of the lake. He observes also that in the center of the strongly steaming lake, a (cinder) cone seems to just be emerging above water level.
In addition, the water is very acid, with a pH value of around 0.5 according to Stefan's measurments, and much of the gasses are sulphur dioxide (SO2). At the coast, the seawater had a temperature of 35 degrees C. Also here, hot gases and hydrothermal solutions escape. More eruptions are likely in the near future.
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Links / Sources:
Previous news
Monday, Aug 19, 2019
Volcanic Ash Advisory Center Wellington (VAAC) issued the following report: ... [more]
Saturday, Aug 03, 2019
Two small, probably phreatomagmatic or phreatic explosions occurred earlier today: due to bad visibility, they were not observed directly from the volcano observatory but inferred from seismic data. ... [more]
Thursday, Aug 01, 2019
Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: ... [more]
Seismic trace of the eruption this morning (image: Magma Indonesia / PVMBG)
Tuesday, Jul 30, 2019
Intermittent explosions continue to occur almost every day at the volcano. Recently, their frequency has increased somewhat. ... [more]
Monday, Jul 29, 2019
Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: ... [more]

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