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Paris in April
Published May 12, 2002
The colors of the agricultural fields surrounding Paris are striking in thespringtime, even when viewed from a 400-kilometer orbital altitude, as seen in this photography taken by astronauts on board the International Space Station.
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Aswan High Dam in 6-meter Resolution from the International Space Station
Published May 6, 2002
Astronaut photography of the Earth from the International Space Station has achieved resolutions close to those available from commercial remote sensing satellites—with many photographs having spatial resolutions of less than six meters. Astronauts take the photographs by hand and physically compensate for the motion of the spacecraft relative to the Earth while the images are being acquired.
Mount Everest from the International Space Station
Published April 28, 2002
This detailed image of Everest, the highest (29,035 feet, 8850 meters) mountain in the world, shows early morning light on the eastern Kangshung Face. The mountains appear to jump out of the picture because the image was taken with low sunlight using an electronic still camera equipped with an 800 mm lens.
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Coastal Fog, South Peruvian Coast at Pisco
Published April 21, 2002
Coastal fog commonly drapes the Peruvian coast. This image captures complex interactions between land, sea, and atmosphere along the southern Peruvian coast. When Shuttle astronauts took the image in March 2002, the layers of coastal fog and stratus were being progressively scoured away by brisk south to southeast winds.
Rio de Janeiro
Published April 14, 2002
A dengue fever outbreak has plagued Rio de Janeiro since January 2002. Dengue fever is a mosquito-borne disease. The elimination of standing water, which is a breeding ground for the mosquitoes, is a primary defense against mosquito-borne diseases like dengue. Removing such water remains a difficult problem in many urban regions.
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Ash and Steam, Soufriere Hills Volcano, Monserrat
Published April 7, 2002
International Space Station crew members are regularly alerted to dynamic events on the Earth’s surface. On request from scientists on the ground, the ISS crew observed and recorded volcanic activity from the summit of Soufriere Hills on March 20, 2002.
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Glacial Retreat in Chilean Patagonia
Published March 31, 2002
The San Quintín Glacier is the largest outflow glacier of the Northern Patagonian Ice Field in southern Chile. Like many glaciers worldwide during the twentieth century, San Quintín appears to be losing mass and possibly retreating.
Image Transformations-Montserrat
Published March 27, 2002
An Earth Observatory reader used widely available software to correct the oblique perspective of an earlier photograph of Montserrat and to adjust the color. The story of how he modified the image includes step-by-step instructions that can be applied to other photographs.
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Kiritimati, Kiribati (Christmas Island)
Published March 24, 2002
Pronounced “Ki-ris-mas,” Kiritimati Island has a large in-filled lagoon that gives it the largest land area (125 square miles, 321 square kilometers) of any atoll in the world. Captain Cook named the atoll Christmas Island when he arrived on Christmas Eve in 1777. Used for nuclear testing in the 1950s and 1960s, the island is now valued for its marine and wildlife resources. It is particularly important as a seabird nesting site—with an estimated 6 million birds using or breeding on the island, including several million Sooty Terns. Rainfall on Kiritimati is linked to El Ni&ntidle;o patterns, with long droughts experienced between the wetter El Ni&ntidle;o years.
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Tsunami Vulnerability in Camana, Peru
Published March 17, 2002
A tsunami washed over the low-lying coastal resort region near Camaná,southern Peru, following a strong earthquake on June 23, 2001. The earthquake was one of the most powerful of the last 35 years and had a magnitude of 8.4. After the initial quake, coastal residents witnessed a sudden draw-down of the ocean and knew a tsunami was imminent. They had less than 20 minutes to reach higher ground before the tsunami hit. Waves as high as 8 meters came in four destructive surges reaching as far as 1.2 kilometers inland. Thousands of buildings were destroyed, and the combined earthquake and tsunami killed as many as 139 people.
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Shiveluch—Kamchatkan volcanoes
Published March 10, 2002
Shiveluch volcano anchors the northern end of a volcanic chain of more than 100 volcanoes covering the Kamchatkan Peninsula. It is one of the most active volcanoes along the Pacific Rim. In 2001, astronauts aboard the International Space Station Alpha looked north toward Shiveluch’s scarred southern slope to get a unique perspective of the impressive cluster of volcanoes in the Klyuchevskaya group and Shiveluch.
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Mesopotamian Marshes
Published March 3, 2002
The Al Hawizah Marshes comprise the largest remaining tract of wetlands in the Mesopotamian Marshlands of Iran and Iraq. In the last 10 years, damming and diversion of waters from the Tigris and Euphrates Rivers, and draining of wetlands has led to a loss of 85% of wetlands that once covered about 20,000 square km (7,725 square miles).