The Ijen Plateau near Banyuwangi and Bondowoso is a less well known but in its own way equally spectacular area of volcanic activity. The Ijen Plateau is the centrepoint of the large mountain range west of Banyuwangi and which abutts the Baluran National Park to the north. For the adventurous traveller a visit to the Ijen Crater (Kawah Ijen) whilst in the region is a must. The crater can be approached from Bondowoso in the west or Banyuwangi in the east. The Bondowoso route is recommended as the road is relatively better (although that is not saying much) and the 90 minute foot climb much easier. When you arrive the colour of the water in the lake is scarcely believable being an extraordinary vivid aqua blue. Evidence of volcanic activity is everywhere with steaming water and brilliant yellow crystaline sulphur deposits. The Ijen Crater is one of the great natural wonders of Indonesia.
This is the second post for my recent 8-day journey in Java, Indonesia. My journey included:
Surabaya-Ijen Plateau-Mount Bromo-Surabaya-Yogyakarta
View A sip of Java in a larger map








The Ijen volcano complex is a group of stratovolcanoes, in East Java, Indonesia. It is inside a larger caldera Ijen, which is about 20 kilometers wide. The Gunung Merapi stratovolcano (not to be confused with Central Java’s Gunung Merapi) is the highest point of that complex.
West of Gunung Merapi is the Ijen volcano, which has a one-kilometer-wide turquoise-colored acid crater lake. The lake is the site of a labor-intensive sulfur mining operation, in which sulfur-laden baskets are carried by hand from the crater floor. Many other post-caldera cones and craters are located within the caldera or along its rim. The largest concentration of post-caldera cones forms an E-W-trending zone across the southern side of the caldera. The active crater at Kawah Ijen has an equivalent radius of 361 meters, a surface of 41 – 106 square meters. It is 200 meters deep and has a volume of 36 – 106 cubic meters.
An active vent at the edge of the lake is a source of elemental sulfur, and supports a mining operation. Escaping volcanic gasses are channeled through a network of ceramic pipes, resulting in condensation of molten sulfur. The sulfur, which is deep red in color when molten, pours slowly from the ends of these pipes and pools on the ground, turning bright yellow as it cools. The cooled material is broken into large pieces and carried out in baskets by the miners. Typical loads range from 70 – 100 kilograms, and must be carried to the crater rim approximately 200 meters above before being carried several kilometers down the mountain. Most miners make this journey twice a day. The miners are paid by a nearby sugar refinery by the weight of sulfur transported; as of July 2005 the typical daily earnings were equivalent to approximately USD5.00. The miners often use insufficient protection while working around the volcano and are susceptible to numerous respiratory complaints.
More pictures on Ijen Plateau available [here...]


