My Indonesia

Indonesia, the largest archipelago and the fifth most populous nation in the world, has a total of 17,508 islands, of which about 6,000 are inhabited. Indonesia extends 3,198 miles (5,150km) between the Australian and Asian continental mainland and divides the Pacific and Indian Oceans at the Equator. With a total land area of 767,777 square miles (1,919,443 sq. km), its 190 million inhabitants are made up of 300 ethnic groups who speak an estimated 583 different languages and dialects. There are five main islands in Indonesia. These are: Java, Sumatra, Kalimantan, Sulawesi and Irian Jaya.

Across its many islands, Indonesia consists of distinct ethnic, linguistic, and religious groups. The Javanese are the largest and most politically dominant ethnic group. Indonesia has developed a shared identity defined by a national language, ethnic diversity, religious pluralism within a majority Muslim population, and a history of colonialism and rebellion against it. Indonesia's national motto, "Bhinneka Tunggal Ika" ("Unity in Diversity" literally, "many, yet one"), articulates the diversity that shapes the country. However, sectarian tensions and separatism have led to violent confrontations that have undermined political and economic stability. Despite its large population and densely populated regions, Indonesia has vast areas of wilderness that support the world's second highest level of biodiversity. The country is richly endowed with natural resources, yet poverty is a defining feature of contemporary Indonesia.

Monday, July 20, 2009

Batur Volcano

Batur Volcano




Batur is the most active volcano on the popular tourist island of Bali and one of Inondesia's more active ones. During the past centuries, Batur has had a number of small eruptions every few years.

The volcano is located at the center of two concentric calderas NW of Agung volcano. The outer 10 x 13.5 km wide caldera was formed during eruption of the Bali (or Ubud) Ignimbrite about 29,300 years ago and now contains a caldera lake on its SE side, opposite the satellitic cone of 2152-m-high Gunung Abang, the topographic high of the Batur complex.
The inner 6.4 x 9.4 km wide caldera was formed about 20,150 years ago during eruption of the Gunungkawi Ignimbrite. The SE wall of the inner caldera lies beneath Lake Batur; Batur cone has been constructed within the inner caldera to a height above the outer caldera rim. The 1717-m-high Batur stratovolcano has produced vents over much of the inner caldera, but a NE-SW fissure system has localized the Batur I, II, and III craters along the summit ridge.

Historical eruptions have been characterized by mild-to-moderate explosive activity sometimes accompanied by lava emission. Basaltic lava flows from both summit and flank vents have reached the caldera floor and the shores of Lake Batur in historical time.


sources : www.volcanodiscovery.com, www.volcano.si.edu, www.flikr.com

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