The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.
Ijen volcano in East Java contains the world's largest acidic volcanic crater lake, called Kawah Ijen, famous for its turquoise color. The active crater measuring 950x600 m is known for its rich sulphur deposits which are being quarried.
The volcano is one of several active stratovolcanoes constructed over the 20 km wide Ijen caldera, the largest caldera in Java.
Eruptions from Ijen are very hazardous because of the risk of the lake draining to form catastrophic lahars.
Access to the volcano's famous crater lake (and its sulfur mining area) has been temporarily closed by authorities. It seems that weak phreatic explosions occurred under the lake on 1 October, without causing damage or fatalities. ...more
No further details are currently available. [less]
Our expedition leader Andi visited Ijen crater during a period of elevated activity in May 2012, when lots of sulfur from the fumaroles was burning at night with blue and reddish flames, creating abstract photos.
During 1-30 April white plumes from Ijen rose 100-200 m above the crater; during 1-11 May diffuse white plumes rose 50-100 m. ...more
From the beginning of April until 13 May the amplitude and number of earthquakes gradually decreased and the crater lake water temperature decreased by eight degrees Celsius. The Alert Level was lowered to 2 (on a scale of 1-4) on 13 May. [less]
The crater lake Kawah Ijen on 7 April 2012 (photo: Andi / VolcanoDiscovery)
Ijen volcano in East Java has calmed down again, although its alert level is still at 3 (out of 4). ...more
Our expedition leader Andi visited the volcano and the observatory and confirms that seismic activity and degassing from the lake have decreased during the past 2-3 weeks. However, PVMBG ( the Volcanological Survey of Indonesia) still keeps the status at level 3 ("eruption warning") and the crater is off-limits to tourists. [less]
CVGHM reported on 25 March that Ijen's lake water chemistry changed during 10 January-17 March, exhibiting a significant increase in carbon dioxide, especially after 5 February, and an increase in acidity. The lake surface temperature increased from 28.8 degrees Celsius on 3 March to 45.1 degrees Celsius on 17 March. The lake water temperature at a depth of 5 m also rose from 42.7 to 44.7 degrees Celsius on 3 and 17 March, respectively. Seismicity increased starting in March. The Alert Level remained at 2.
The official alert level for Ijen volcano in East Java, Indonesia, has been raised again to 3 ("alert") due to an increase in activity, our Indonesian correspondant Andi reports. ...more
A new 10 m wide gas vent, which erupted buring gasses, was observed on 10 March at 17 m distance from the shore. Thick steaming, larger than usual, forming a thick white column of sulfur steam 200 m high was already noted since 3 March. Measurements of the lake water temperature at 5 m depth had also shown increased values of 42.70 deg C. On 10 March, the lake surface was 2 meters higher than normal, although this could be attributed to heavy recent rain fall. [less]
The crater of Ijen is again open for visitors. The Indonesian Geological Survey lowered the alert level for Ijen volcano yesterday back from 3 (where it had been since 18 Dec, on a scale of 1-4) to 2. ...more
The decision was based on measurements of decreasing seismic, visual and temperature parameters that are regularly monitored at the volcano: 1) Decreasing steaming and bubbling from the lake was visually observed during the past weeks. [less]
Ijen volcano in East Java, famous for its turquoise crater lake and the massive sulfur deposits inside the crater, might be close to an eruption. ...more
Due to further increased seismic activity, stronger degassing and steaming, the Indonesian Geological Survey has raised the alert level for Ijen volcano from 2 to 3 (out of 4). A phreatic eruption could occur any time, geologists believe. The lake has changed color to white. The last eruption was in 1993 and had produced ash plumes rising about 1000 m. [less]
The alert level of Ijen volcano in East Java has been raised to alert/unrest (2 out of 4) due to increased seismic activity and increased temperatures and fumaroles inside the crater, famous for its turquoise acid lake and the sulfur deposits, which are being quarried by workers. ...more
An exclusion zone of 1 km around the crater has been established. Workers and tourists are currently not allowed to go inside the crater. [less]
Dallol hot springs: One of the most bizarre landscapes on earth: Dallol is a vast and very active hydrothermal field creating a colorful array of hot springs, small geysers, salt towers, colorful lakes and ponds in the middle of the deepest part of the Danakil desert and the Karum salt lake.
Raung volcano photos: One of the largest and most active volcanoes in East Java, rarely-visited and relatively unknown Raung became (in)famous during its recent eruption in 2015 when its frequent ash plumes forced the repeated closure of Bali's airport.
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