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Mounts Sumbing and Gede and the Dieng Volcanic Complex, Indonesia – February 29th, 2012

7.2S 109.2E

February 29th, 2012 Category: Image of the day, Volcanoes

Indonesia - January 4th, 2012

This APM image shows several volcanoes on the island of Java, Indonesia. Visible near the bottom edge is Mount Sumbing or Gunung Sumbing, an active stratovolcano in Central Java, Indonesia, symmetrical with Sundoro. The only report of historical eruptions is from 1730. It has created a small phreatic crater at the summit.

Moving to the northwest of Mount Sumbing one comes to  Mount Gede, followed by the Dieng Volcanic Complex. The complex of volcanoes is located on the Dieng Plateau in the Central Java, Indonesia. The volcanic complex consists of two or more of stratovolcanoes, more than 20 small craters and Pleistocene-to-Holocene age volcanic cones.The Prahu stratovolcano was truncated by a large Pleistocene caldera and then filled by parasitic cones, lava domes and craters.

Cañadas Canyonlike Valleys and Montañas del Oriente by Mexico-Guatemala Border

15.9N 90.6W

February 15th, 2012 Category: Mountains

Mexico - January 3rd, 2012

This APM image shows a change from mountains to flat terrain by the border of Chiapas, Mexico and Guatemala. Visible in the upper left quadrant is the Lacandon Jungle (Spanish: Selva Lacandona), an area of rainforest which stretches from Chiapas, Mexico into Guatemala and into the southern part of the Yucatán Peninsula. The heart of this rainforest is located in the Montes Azules Biosphere Reserve in Chiapas near the border with Guatemala in the Montañas del Oriente region of the state.

The Lacandon has approximately 1.9 million hectares stretching from southeast Chiapas into northern Guatemala and into the southern Yucatán Peninsula. The Chiapas portion is located on the Montañas del Oriente (Eastern Mountains) centered on a series of canyonlike valleys called the Cañadas, between smaller mountain ridges oriented from northwest to southeast. It is bordered by the Guatemalan border on two sides with Comitán de Domínguez to the southwest and the city of Palenque to north.

The dark red spot near the right edge of the image is the Laguna Lachuá, a Karstic lake in Guatemala. It is located in the middle of a national park covered with tropical rain forest, northwest of Cobán, near the border between the departments of Alta Verapaz and El Quiché. The lake is near circular in shape and is probably a cenote or doline. The Peyan river forms the principal water inflow and the Lachua river its main outflow.

Ottawa, Capital City of Canada, at Confluence of Ottawa and Rideau Rivers

45.4N 75.6W

January 27th, 2012 Category: Rivers

Canada - January 5th, 2012

This APM image shows the city of Ottawa, the capital of Canada. The city centre is located at the confluence of the Ottawa and Rideau Rivers. The Ottawa River forms the entire northern boundary of the city (which appears bright green in this image), which it shares with the province of Quebec’s municipalities of Pontiac and Gatineau.

Here, Gatineau can be seen as an orange area across the Ottawa River, which also forms the border between Ontario and Quebec. The highest point in the Ottawa is 166 m (545 ft) above sea level, while the lowest point in the city is the Ottawa River, at 44m above sea level. Located on a major, yet mostly dormant fault line,[50] Ottawa is occasionally struck by earthquakes.

Jakarta and Mount Gede Volcano, Indonesia

6.2S 106.8E

January 19th, 2012 Category: Volcanoes

Indonesia - January 4th, 2012

In the upper right corner of this APM image is Jakarta, the capital and largest city of Indonesia. It is located on the northwest coast of Java, at the mouth of the Ciliwung River on Jakarta Bay, which is an inlet of the Java Sea. The city has an area of 661 square kilometres (255 sq mi).

Jakarta lies in a low, flat basin, averaging 7 metres (23 ft) above sea level; 40% of Jakarta, particularly the northern areas, is below sea level, while the southern parts are comparatively hilly. Rivers flow from the Puncak highlands to the south of the city, across the city northwards towards the Java Sea; the most important is the Ciliwung River, which divides the city into the western and eastern principalities. Other rivers include the Pesanggrahan, and Sunter.

Visible to the south, near the right edge, in the full image, is Mount Gede or Gunung Gede, a stratovolcano in West Java, Indonesia. The volcano contains two peaks: Mount Gede and Mount Pangrango. Seven craters are located in the complex: Baru, Gumuruh (2,927 m), Lanang (2,800 m), Kawah Leutik, Ratu (2,800 m), Sela (2,709 m) and Wadon (2,600 m). Historical volcanic activity has been recorded since the 16th century.

Tonlé Sap During Middle of Dry Season, Cambodia

12.9N 104.0E

January 14th, 2012 Category: Lakes

Cambodia - January 14th, 2012

This APM image shows the western part of the Tonlé Sap (loosely translated as “Great Lake”) and surrounding floodplain. The Tonlé Sap is the largest freshwater lake in South East Asia, and is part of a complex lake and river system.

The Tonlé Sap is unusual for two reasons: its flow changes direction twice a year, and the portion that forms the lake expands and shrinks dramatically with the seasons. From November to May, Cambodia’s dry season, the Tonlé Sap drains into the Mekong River at Phnom Penh. However, when the year’s heavy rains begin in June, the Tonlé Sap backs up to form an enormous lake. This image shows the lake towards the middle of the dry season.

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