NASA

Landsat image maps aid fire recovery efforts

NASA satellite images regularly map active fires around the world. Once a fire is out, satellite data and maps are also used by scientists to measure and protect the scorched land, and have played an important role in streamlining fire recovery efforts. The Remote Sensing Applications Center (RSAC), operated by the U.S. Department of Agriculture Forest Service, and other national agencies that specialize in fire recovery use Landsat 5 and 7 satellite data to observe vegetation, water and soil changes after a fire.

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Thu, 25/08/2011 - 11:15

CDEMA publishes situation report on the Matthieu Dam's collapse

In the early morning of July 28, 2011, Dominica's Matthieu Dam was breached, damaging infrastructure downstream in the Layou River valley. In the context of the ongoing Caribbean Satellite Disaster Pilot, an initiative involving a host of entities including the Caribbean Disaster & Emergency Management Agency, CATHALAC, NASA, UN-SPIDER, and others, recently completed an assessment of the Matthieu Dam collapse.

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Wed, 17/08/2011 - 12:18

Landsat Satellites Track Continued Missouri River Flooding

Flooding along the Missouri River continues as shown in recent Landsat satellite images of the Nebraska and Iowa border. Heavy rains and snowmelt have caused the river to remain above flood stage for an extended period.

A Landsat 5 image of the area from May 5, 2011 shows normal flow. In contrast, a Landsat 7 image from July 17 depicts flood conditions in the same location.

A national overview map of streamflow provided by U.S. Geological Survey (USGS) WaterWatch graphically portrays the immense geographic extent of flooding in the Missouri River basin.

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Thu, 21/07/2011 - 12:10

Here's Looking @ Earth... First Volcanoes... Now Snow

Ordinarily, the flashes of white in South America’s Atacama Desert rise from salt pans.But on July 7, 2011, when the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite acquired these images, the white came from a far rarer commodity: snow. Starting on July 3 and lasting several days, a cold front dumped up to 80 centimeters of snow (32 inches) on the driest desert in the world, reported BBC News.

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Wed, 13/07/2011 - 17:05

Landsat 5 captures Missouri River flooding near Omaha

Landsat 5 captured an image of flooding occurring along the Iowa/Nebraska border on June 30, 2011. Flooding is still occurring on July 6, and Flood Warnings are still in effect from the National Weather Service.

The Landsat 5 image captured was an enlargement of the area just north of Omaha. The flood waters show up as very dark blue and, where the water is shallow, medium blue. In the image, the Interstate is cut off by flood waters, just south of Missouri Valley, Iowa, and about 20 miles north of Omaha.

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Thu, 07/07/2011 - 17:25

June 2011

NASA's Aura Satellite measures pollution from New Mexico, Arizona fires

NASA's Aura Satellite has provided a view of nitrogen dioxide levels coming from the fires in New Mexico and Arizona. Detecting nitrogen dioxide is important because it reacts with sunlight to create low-level ozone or smog and poor air quality.The fierce Las Conchas fire threatened the town and National Laboratory in Los Alamos, while smoke from Arizona's immense Wallow Fire and the Donaldson Fire in central New Mexico also created nitrogen dioxides (NO2) detectable by the Ozone Measuring Instrument (OMI) that flies aboard NASA's Aura satellite.

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Tue, 05/07/2011 - 11:07

NASA Flights Seek To Improve View Of Air Pollution From Space

WASHINGTON -- Two NASA research airplanes will fly over the Baltimore-Washington region and northeast Maryland this summer as part of a mission to enhance the capability of satellites to measure ground-level air quality from space.

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Fri, 24/06/2011 - 15:58

Satellite programs aid emergency crews battling wildfires

Multiple firefighting agencies are using imagery -- provided by federally funded Landsat 5 and 7, Aqua and Terra satellites -- to combat wildfires that continue to blaze across Arizona.

The satellites capture images of the Earth's surface and then, using color enhancements, firefighters can identify different regions most susceptible to wildfire burning. In the images, burn scars are red, ongoing fires are bright red, vegetation is green, smoke is blue and bare ground is tan-colored.

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Thu, 23/06/2011 - 14:44

Infrared NASA imagery reveals a weaker tropical cyclone in the South China Sea

Tropical Depression 06W is still slowing, making its way through the South China Sea today and has weakened overnight. NASA infrared satellite imagery showed a much more disorganized storm with scattered convection, which accounts for its weakened status from tropical storm to tropical depression.

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Wed, 22/06/2011 - 17:52

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