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Payun Matru Shield Volcano and Llancanelo Lagoon, Argentina

36.4S 69.1W

February 3rd, 2012 Category: Lakes, Volcanoes

Argentina - January 9th, 2011

This orthorectified image shows Payun Matru (near the image center), a shield volcano in Argentina, located in the Reserva Provincial La Payunia of the Malargüe Department, to the south of Mendoza Province. Volcán Payun is notable for large crystals of hematite pseudomorphs after magnetite, of volcanic fumarole origin.

Visible as a large, black expanse to the north in the full image is Llancanelo Lagoon (Spanish: Laguna de Llancanelo, a wetland with an area of 650 km² located in the Malargüe Department in the south of Mendoza Province, Argentina. It is situated 75 km from the city of Malargüe, at 1,280 m above mean sea level, within the arid region near the Andes in the limit between the regions of Cuyo and Patagonia. Llancanelo Lagoon is a provincial nature reserve and a Ramsar site that hosts a variety of bird species.

Maipo Stratovolcano and Diamante Lagoon, Chile and Argentina

34.1S 69.8W

February 2nd, 2012 Category: Lakes, Volcanoes

Chile - January 9th, 2011

Visible at the center of this orthorectified image is Maipo, a stratovolcano in the Andes, lying on the border between Argentina and Chile. It is located 90 km south of Tupungato and about 100 km southeast of Santiago.

Maipo retains a symmetrical, conical volcanic shape, unlike many of the other nearby peaks, making it the best known peak in the region, though it is not the highest. (Nearby Castillo is 5,485 m high.) Maipo is also almost the southernmost 5,000 metre peak in the Andes. (That honor goes to Sosneado, about 50 km to the south).

Maipo is located within the Diamante Caldera, a feature of about 15 km by 20 km size that is about one-half million years old. It rises about 1,900 m (6,230 ft) above the floor of the caldera. Immediately to the east of the peak, on the eastern side of the caldera floor, is Laguna del Diamante, a picturesque lake that formed when lava flows blocked drainage channels from the caldera in 1826. The lake covers a surface area of about 14.1 km² and is one of the largest freshwater resources in the Province.

Haleakalā, Eastern Volcano of Maui, USA

20.7N 156.3W

January 30th, 2012 Category: Volcanoes

USA - December 25th, 2011

This orthorectified image shows the island of Maui, the second-largest of the Hawaiian Islands at 727.2 square miles (1,883 km2) and the 17th largest island in the United States. Maui’s diverse landscapes are the result of a unique combination of geology, topography, and climate. Each volcanic cone in the chain of the Hawaiian Islands is built of dark, iron-rich/quartz-poor rocks, which poured out of thousands of vents as highly fluid lava, over a period of millions of years. Several of the volcanoes were close enough to each other that lava flows on their flanks overlapped one another, merging into a single island.

Maui is such a “volcanic doublet”, formed from two shield volcanoes that overlapped one another to form an isthmus between them. This image focuses on the larger, younger volcano to the east, Haleakalā, which rises to more than 10,000 feet (3,000 m) above sea level, but measures 5 miles (8.0 km) from seafloor to summit, making it one of the world’s highest “mountains”. The eastern flanks of the volcano are cut by deeply incised valleys and steep-sided ravines that run downslope to the rocky, windswept shoreline.

Mount Teide Volcano on Tenerife, Canary Islands – January 20th, 2012

28.2N 16.6W

January 20th, 2012 Category: Image of the day, Volcanoes

Tenerife - January 9th, 2012

This orthorectified image shows Tenerife, the largest and most populous island of the seven Canary Islands. It is a rugged and volcanic island sculpted by successive eruptions throughout its history. Tenerife is the largest island of the Canary Islands archipelago, with a surface area of 2,034.38 km2 (785 sq mi) and the longest coastline amounting to 342 km (213 mi).

In addition, the highest point, the volcano Mount Teide, with an elevation of 3,718 m (12,198 ft) above sea level is the highest point in all of Spain. It is the third highest volcano in the world measured from its base on the ocean floor, after Mauna Loa and Mauna Kea located in Hawaii.

Mount Muria and Volcanic Spine of Java, Indonesia – November 13th, 2011

7.1S 110.7E

November 13th, 2011 Category: Image of the day, Volcanoes

Indonesia - November 8th, 2011

This orthorectified wide-swath ASAR image shows central Java, in Indonesia. Several volcanic peaks can be seen running along the length of the island. 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.

Of particular note in this image is Mount Muria, a dormant volcano on the north coast of the island. The volcano is located in the center of the Muria peninsula, which juts northward into the Java Sea on the north coast of Central Java, Indonesia, east of Semarang. Mount Muria is 1602 meters high.