Kawah Ijen, is the famous name of Mount (Gunung) Ijen, with location beetween Bondowoso district and Banyuwangi East Java Indonesia. Kawah ijen 2.300 metres above sea level, with volcano is one of several mount volcanoes located in the 15 km diameter including coffee plantation area. The volcanic cone of Kawah Ijen crater dominates the landscape at the eastern end island of Java, Indonesia. The crater is filled by a spectacular turquoise blue lake acid. The Lake odf Mt Ijen areal is 45 H with deep of lake is around 200 metres is on of the largest lake of sulfuric acid in the world, the active volcano crater at Kawah Ijen has an equivalent radius of 361 meters.
Kawah Ijen volcano has erupted six times since 1796, most recently is in 1993 year. Most of the eruption were phreatic. The eruption have been small to moderate ( VEI = 1-2 ). In 1817, the crater lake collapsed, producing mudflows that destroy three village and around 90 houses. The number of deaths is still unknown, and In late month June of 1997, the color of the crater lake changed and seismicity and activity at the fumarole increased but Ijen did not erupt. The activity ever record of Ijen Crater on 1918, 1921, 1923, 1927, 1929, 1933, 1941.
To visit Kawah ijen you will also see the Sulfur minner activity, this control by a company and now have more than 300 people work for taking and carrying sulfur stone from the Crater. Every days total production beetween 15 – 45 tons this is will be change by weather condition for production.
The cooled materials is broken into large pieces and carried out in basket by the sulfur minners. Avarage they loads range from 70 – 100 kilogram, and must be carried to the rim crater approximately 200 metres above before being carried several kilometers down the mountain. Most of the sulfur miners make this journey twice a day. The sulfur mining are paid depend on they carry out.
Visit kawah Ijen have 2 access via Bondowoso will be take about 2 – 3 hours passing village and tropical forest and throught via Banyuwangi . Visit Ijen via Banyuwangi is no public transport, its should rent car or using motorcycle from Banyuwangi driving about 2 hours to Pal Tuding shelter or rent jeep 4WD with capacity 6 person. Paltuding shelter is National Park Office Camp, over there you will trekking up about 2 hours to the rim of mount ijen, to see the acid lake and active crater.