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Asian Dust Arrives Over California
Visitors to Death Valley, California were puzzled by a persistenthaze over the past weekend (April 14th and 15th, 2001). In a region wherethe skies are almost always crystal clear, visibility was limitedto no more than 10 miles. The likely cause…
What Medieval Witnesses Saw Was Not Big Lunar Impact, Grad Student Says
The idea that what humans witnessed and chronicled in 1178 A.D. was a major meteor impact that created the 22-kilometer (14-mile) lunar crater called Giordano Bruno is myth, a University of Arizona graduate student has discovered.
Yangtze River and Three Gorges Dam
This Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) image, acquired on May 21, 2000, shows a stretch of the Yangtze River in China, including the Wu Gorge, the middle of the three gorges. (Click on the full-resolution version of…
Scientists Watch Dark Side of the Moon to Monitor Earth’s Climate
Scientists have revived and modernized a nearly forgotten technique for monitoring Earth’s climate by carefully observing “earthshine,” the ghostly glow of the dark side of the moon.
Cyprus
The island of Cyprus is located south of Turkey and northwest ofLebanon in the Mediterranean Sea. The island is 225 km from east towest, and has an area of about 9,250 square kilometers. This image,acquired by NASA’s Moderate-resolution Imaging Spectroradiometer(MODIS)…
Aurora Australis
Reds and greens dominate this view of the northern lights as photographed from the Space Shuttle in May 1991.
Topography: Haro and Kas Hills, India
On January 26, 2001, the Kachchh region in western Indiasuffered the most deadly earthquake in India’s history. This shaded topographyview of landforms northeast of the city of Bhuj depicts geologic structuresthat are of interest in the study the tectonic processes…
Australia’s Great Barrier Reef
The Great Barrier Reef extends for 2,000 kilometers along thenortheastern coast of Australia. It is not a single reef, but a vastmaze of reefs, passages, and coral cays (islands that are part of thereef). This nadir true-color image was acquired…
Significant Event Report for Week Ending 4/13/2001
Cassini Significant Event Report For Week Ending 04/13/01 The most recent spacecraft telemetry was acquired from the Goldstone tracking station on Wednesday, April 11. The Cassini spacecraft is in an excellent state of health and is operating normally. The speed…
The Link Between Sea Surface Temperature and Vegetation
These global-scale, false-color images represent data collected bythe NOAA Advanced Very High Resolution Radiometer (AVHRR) sensor and compositedfor the months of April 1983 andApril 1989, respectively. Over the oceans, the colors represent seasurface temperature anomaly–reds show higher than average temperatures,blues…
Biggest Solar Flare on Record
View an animation from the Extreme ultraviolet Imaging Telescope (EIT). At 4:51 p.m. EDT, on Monday, April 2, 2001, the sun unleashed thebiggest solar flare ever recorded, as observed by the Solar andHeliospheric Observatory (SOHO) satellite. The flare was definitelymore…
Receding Glacier in Iceland
For more images and animations,see Iceland’s Receding Glacier. According to NASA glaciologist Dorothy Hall, Landsat data show thatIceland’s Breidamerkurjökull has receded by as much as 2 km since1973. The Breidamerkurjökull is an outlet glacier, which is partof Vatnajökull–the largest ice…
Ganges River Delta
The combined delta of the Gangesand Brahmaputra Rivers is the largest in the world. This true-colorimage from the Moderate-resolution Imaging Spectroradiometer (MODIS)shows both the delta and sediment flowing into the Bay of Bengal.Fed by monsoon rains and Himalayan snowmelt, the…
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