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Posts tagged Sumba

Eruption of Paluweh Volcano, Indonesia

8.3S 121.7E

April 1st, 2013 Category: Volcanoes

Indonesia – March 24th, 2013

Ash is projected forth from the summit of the Paluweh (also known as Rokatenda) Volcano in Indonesia. It is carried southwest by winds, over the island of Flores, the Savu Sea and the island of Sumba. The eruption at Paluweh may have been caused by the collapse of an unstable lava dome. The number of small tremors and emissions of ash increased in October 2012 and continued into February 2013, perhaps indicating growth of the lava dome.

Environmental Threats to Lesser Sunda Islands

8.6S 121.0E

May 22nd, 2012 Category: Snapshots

Indonesia - May 20th, 2012

This image shows several of the Lesser Sunda Islands, a group of islands in the southern Maritime Southeast Asia, north of Australia. The three largest islands visible here are Sumba, Flores and Timor (lower half of image, from left to right). The islands are part of a volcanic arc, the Sunda Arc, formed by subduction along the Java Trench in the Java Sea.

Although most of the vegetation on these islands is dry forest there are patches of rainforest on these islands too, especially in lowland areas and along riverbanks. However, the ecosystem is threatened: more than half of the original vegetation of the islands has been cleared for planting of rice and other crops, for settlement and by consequent forest fires.

While many ecological problems affect both small islands and large landmasses, small islands suffer their particular problems and are highly exposed to external forces. Development pressures on small islands are increasing, although their effects are not always anticipated. Although Indonesia is richly endowed with natural resources, the resources of the small islands of Nusa Tenggara are limited and specialised; furthermore human resources in particular are limited.

Indonesia’s Lesser Sunda Islands

8.5S 116.6E

August 3rd, 2009 Category: Snapshots, Volcanoes

Indonesia - July 2nd, 2009

Indonesia - July 2nd, 2009

From left to right, the largest Indonesian islands visible here are Java, Bali, Lombok, Sumbawa, Sumba and Flores. All except Java are part of the Lesser Sunda Islands, or Nusa Tenggara, group.

The island of Bali, surrounded by coral reefs, lies 3.2 km (2 mi) east of Java. East to west, the island is approximately 153 km (95 mi) wide and spans approximately 112 km (69 mi) north to south; its land area is 5,632 km². The highest point is Mount Agung at 3,142 m (10,308 feet) high, an active volcano.

Lombok, east of Bali, is roughly circular, with a “tail” to the southwest, about 70 km across and a total area of about 4,725 km² (1,825 sq mi).

Sumbawa has an area of 15,448 km² (three times the size of its western neighbor Lombok). It is a volcanic island, lying within the Pacific Ring of Fire, including the volcano Mount Tambor.

Finally, the island of Sumba has an area of 11,153 km². There is a dry season from May to November and a rainy season from December to April.

The Lesser Sunda Islands

8.5S 121.8E

June 28th, 2009 Category: Snapshots

Lesser Sunda Islands - June 23rd, 2009

Lesser Sunda Islands - June 23rd, 2009

The Lesser Sunda Islands, also called the Nusa Tenggara, are a group of islands in the middle-south part of Maritime Southeast Asia. Together with the Greater Sunda Islands to the west they make up the Sunda Islands. The islands are part of a volcanic arc, the Sunda Arc, formed by subduction along the Java Trench.

The Lesser Sunda Islands consist of two geologically distinct archipelagos. The northern archipelago, which includes Flores (left, center), Sumbawa (full image, west of Flores),  Lombok (full image, west of Sumbawa), Bali (full image, left edge) and Wetar, is volcanic in origin.

The islands of the southern archipelago, on the other hand, including Sumba (left edge, below center), Timor (right edge, center) and Babar, are non-volcanic.

Lying at the collision of two tectonic plates, the Lesser Sunda Islands comprise some of the most geologically complex and active regions in the world. Biodiversity and distribution is affected by various tectonic activities.

The Lesser Sunda Islands differ from the large islands of Java or Sumatra containing many small islands as well as deep oceanic trenches. Flora and fauna immigration between islands is restricted, leading to the evolution of a high rate of localized species.