This image from Japan's ALOS satellite shows the Aorounga Crater in northern Chad.
Bazman volcano is located in a remote region of southern Iran, within the Bazman Protected Area of Sistan and Baluchestan Provinces. While the volcano has the classic cone shape of a stratovolcano, it is also heavily dissected by channels that extend downwards from summit.
This false-colour composite image from the Kompsat-2 satellite shows part of the Qarhan Salt Lake on the Tibetan Plateau in China.
This Pleiades image, acquired 19 December 2013, shows the city of Sochi in Russia, which will host the 2014 Winter Olympics.
This astronaut photograph from the International Space Station shows Lake Sharpe, an approximately 130 kilometre (80 mile) long reservoir formed behind the Big Bend Dam on the Missouri River near Lower Brule, South Dakota. The lake surface is frozen and covered with snow, presenting a uniform white appearance.
The Dasht-e Lut salt desert in southeast Iran is captured in this Envisat image, acquired by the MERIS instrument on 02 April 2012.
While the northern latitudes are bathed in the dull colours and light of mid-winter, the waters of the southern hemisphere are alive with mid-summer blooms. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Aqua satellite acquired this natural-colour satellite image of a plankton bloom as it appeared at 1:05 p.m. local time on 30 December 2013.
This ALOS image, acquired 16 June 2010 by Advanced Visible and Near Infrared Radiometer, was captured over the Sakha Republic in eastern Russia.
The first winter storm of 2014 swept across the northeastern United States on 01-03 January, bringing as much as 24 inches (61 centimetres) of snow to the hardest hit areas. The centre of the storm was over the North Atlantic Ocean when the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite acquired this image at 10:55 a.m. Eastern Time on 03 January.
This disaster impact map shows Saint-Louis on the island of Reunion, which was flooded by Cyclone Bejisa on 02 January 2014.
Lakes and mountains of western Uganda are captured in this Envisat radar image.
Geographers like night images of cities because you see immediately so much about the human landscape-things that are difficult or impossible to see in day images. You see where the cities are located and their shape; the brightest light clusters frequently indicate the city centres. In images with a large field of view, you can also see the position and size of cities relative to one another.
This KOMPSAT-2 image, acquired on 6 July 2012, shows the Amazon River in the heart of northern Brazil's rainforest.
While active volcanoes are obvious targets of interest because they pose natural hazards, there are some dormant volcanoes that also warrant concern because of their geologic history. One such volcano is Sollipulli, located in central Chile near the border with Argentina.
The Arcachon Bay in France's southwest Aquitaine region is pictured in this image acquired on on 8 September 2009 by Japan's ALOS observation satellite.
This TerraSAR-X image, acquired 30 November 2013, shows Kiritimati atoll in the Pacific Ocean.
It drains a watershed that spans eight countries and nearly 1.6 million square kilometres (600,000 square miles). The Zambezi (also Zambeze) is the fourth largest river in Africa, and the largest east-flowing waterway. From headwaters in Zambia, it rolls across 2,574 kilometres (1,599 miles) of the south-central African plateau before pouring water and sediment into the Indian Ocean through a vast delta in Mozambique.
Xaver affected much of northern Europe on 5 and 6 December and caused the worst storm surge for decades in the North Sea.
Clouds blur our view of the snow below in parts of this image acquired over the southern tip of Greenland by the satellite on 30 May 2013.
The Aorounga impact structure in northern Chad is 12.6 kilometres (7.8 miles) in diameter, large enough to display a central peak and more than one concentric ring. This eroded remnant of a crater in Africa's Sahara Desert is estimated to be less than 345 million years old. Astronauts have photographed it several times over the years, most recently in 2009 and in 2011. But it's not the crater itself that caught NASA's eyes this time. It is the sandy landscape around it.
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