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Volcanoes of Java and the Lesser Sunda Islands

8.5S 115.0E

September 29th, 2012 Category: Volcanoes

Indonesia – August 31st, 2012

The chain of islands on the right side of this image belong to the northern archipelago of the Lesser Sunda Islands, including Bali, Lombok, Sumbawa, Flores and Wetar. The archipelago is volcanic in origin, with a number of still active volcanoes, such as Mount Rinjani on Lombok. Others, however, such as Kelimutu, on Flores, are extinct.

Visible on the left side of the image, west of the Lesser Sunda Islands chain, is the island of Java. Formed mostly as the result of volcanic eruptions, Java is the 13th largest island in the world and the fifth largest island in Indonesia. A chain of volcanic mountains, easily visible in this image, forms an east-west spine along the island.

Surabaya on the Shores of East Java, Indonesia – February 27th, 2012

7.2S 112.7E

February 27th, 2012 Category: Image of the day, Volcanoes

Indonesia - February 6th, 2012

Visible on the coast of Java as a white area in this orthorectified wide-swath ASAR image is Surabaya, Indonesia’s second-largest city with a population of over 2.7 million (5.6 million in the metropolitan area). It is the capital of the province of East Java. It is located on the northern shore of eastern Java at the mouth of the Mas River and along the edge of the Madura Strait.

Java is almost entirely of volcanic origin; it contains thirty-eight mountains forming an east-west spine which have at one time or another been active volcanoes. Several of these can be seen in a row down the center of the island, although Surabaya lies along the coastal plain. More mountains and highlands help to split the interior into a series of relatively isolated regions.

Vegetation Index of Borneo, Belintung and Java, Indonesia

6.9S 107.6E

February 18th, 2012 Category: Vegetation Index

Indonesia - January 4th, 2012

This FAPAR image shows the vegetation index of Kalimantan (the Indonesian part of the island of Borneo, above), Belintung (also part of Indonesia, near the left edge), and Java (another island of Indonesia, below). The index range from good (green) to high (rusty red) on all three islands, with very few areas of low (yellow) activity.

Belintung is a medium sized island of about 3,000 square miles (7,800 km2), it consists of moderately rugged terrain with several hills. Java is almost entirely of volcanic origin; it contains thirty-eight mountains forming an east-west spine. More mountains and highlands help to split the interior into a series of relatively isolated regions suitable for wet-rice cultivation.

Islands of Indonesia from Java to Lombok

8.4S 116.4E

February 15th, 2012 Category: Volcanoes

Indonesia - February 9th, 2012

This orthorectified wide-swath ASAR image shows several islands in Indonesia: (from left to right) Java (mainly East Java), Bali and Lombok. Also visible at the top are Madura (left) and Saubi (right).

East Java is a province of Indonesia. It is located on the eastern part of the island of Java and includes neighboring Madura and islands to its east (the Kangean and Sapudi groups) and to its north (Bawean and the Masalembu Islands). The provincial capital is Surabaya, the second largest city in Indonesia and a major industrial center and port.

Many volcanic peaks can be seen on the islands. One of the most prominent is Mount Rinjani, on Lombok, visible near the right edge. This active volcano on Lombok rises to 3726 m, making it the second highest volcano in Indonesia. On the top of the volcano is a 6 km by 8.5 km caldera, partially filled by Segara Anak (Child of the Sea) lake. This lake is approximately 2000 metres above sea level and estimated at 200 metres deep.

Iyang-Argapura and Ijen Volcano Complexes, Java, Indonesia – December 17th, 2011

7.9S 113.5E

December 17th, 2011 Category: Image of the day, Volcanoes

Indonesia - December 11th, 2011

This orthorectified wide-swath ASAR image shows several volcanoes on the island of Java, Indonesia. Visible near the center of the island is Iyang-Argapura, a massive volcanic complex that dominates the landscape between Mount Raung and Mount Lamongan. Valleys up to 1,000 m deep dissect the strongly eroded Iyang volcano.

Visible on the east end of the island is the Ijen volcano complex, a group of stratovolcanoes. It is inside a larger caldera Ijen, which is about 20 kilometers wide. The Gunung Merapi stratovolcano is the highest point of that complex. West of Gunung Merapi is the Ijen volcano, which has a one-kilometer-wide acid crater lake.

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 east/west-trending zone across the southern side of the caldera. The active crater at Kawah Ijen has an equivalent radius of 361 metres (1,184 ft), a surface of 0.41 square kilometres (0.16 sq mi). It is 200 metres (660 ft) deep and has a volume of 36 cubic hectometres (29,000 acre·ft).