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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.

Nezahualcoyotl Lake on Grijalva River, Mexico – January 16th, 2012

17.1N 93.3W

January 16th, 2012 Category: Image of the day, Lakes, Rivers

Mexico - December 31st, 2011

This APM image shows Nezahualcoyotl Lake, an artificial lake created by the hydroelectric Malpaso Dam, on the Grijalva River. The Malpaso Dam (also known as Nezahualcoyotl and Raudales Malpaso) is an embankment dam near Tecpatán in Chiapas, Mexico.  It was the first major dam on the Grijalva River.

The Grijalva River, formerly known as Tabasco River, is a 480 km long river in southeastern Mexico. The river rises in Chiapas highlands and flows from Chiapas to the state of Tabasco through the Sumidero Canyon into the Bay of Campeche. The river’s drainage basin is 134,400 km² in size.

Semarang and Numerous Stratovolcanoes in Java, Indonesia – November 17th, 2011

6.9S 110.4E

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

Indonesia - November 8th, 2011

This APM image shows the city of Semarang, located on the northern coast of Java, Indonesia. It is the capital of the province of Central Java. It has an area of 305.17 km² and a population of approximately 1.5 million people, making it Indonesia’s 9th most populous city. The northern part of the city is built on the coastal plain while the southern parts are on higher ground.

Visible in the lower half of the image are a series of volcanic peaks. In a curved line due south of the city are four stratovolcanoes (from north to south): the deeply eroded Mount Ungaran, Mount Telomoyo, the dormant Mount Merbabu and the active Mount Merapi. In the lower left quadrant are Mount Sundoro (left) and Mount Sumbing (right), both of which are active stratovolcanoes.

Mekong River Flowing Past Phnomnh Penh, Cambodia and Vietnam – November 12th, 2011

11.5N 104.9E

November 12th, 2011 Category: Image of the day, Rivers

Cambodia and Vietnam - November 7th, 2011

This APM image shows the Mekong River crossing Cambodia and flowing past Phnomh Penh, towards Vietnam (visible in the lower part of the full image). Located on the banks of the Mekong, Phnom Penh is the capital and largest city of Cambodia.

The Mekong is the world’s 10th-longest river and the 7th-longest in Asia, with an estimated length of 4,909 km (3,050 mi). It drains an area of 795,000 km2 (307,000 sq mi), discharging 475 km3 (114 cu mi) of water annually. The extreme seasonal variations in flow and the presence of rapids and waterfalls in this river have made navigation extremely difficult.

Flat Floodplains in Southern Vietnam – November 7th, 2011

10.0N 105.0E

November 7th, 2011 Category: Image of the day

Vietnam - November 7th, 2011

This APM image shows part of Vietnam’s Mekong Delta Region, near the border with Cambodia. It is the region in southwestern Vietnam where the Mekong River approaches and empties into the sea through a network of distributaries.

The Mekong delta region encompasses a large portion of southwestern Vietnam of 39,000 square kilometres (15,000 sq mi), although the size of the area covered by water depends on the season.

The Mekong Delta region of Vietnam displays a variety of physical landscapes, ranging from mountains and highlands to the north and west to broad, flat floodplains in the south. This image focuses on those flat floodplains.