21 May '11, 10pm

Valle Caldera, New Mexico [image] #NASA

Spanning about 22 kilometers (14 miles), Valles Caldera in New Mexico was formed from the collapse of a magma chamber following ancient volcanic eruptions. The Enhanced Thematic Mapper Plus on Landsat 7 satellite captured this natural-color image of the area on May 22, 2002. Plants have colonized parts of the caldera, which is surrounded by a network of valleys. The city of Los Alamos lies to the east. Valles Caldera is a complex formation resulting from two high-volume eruptions that occurred during the Pleistocene Epoch. Eruptions about 1.7 million and 1.2 million years ago pushed up magma that was rich with water and granite. When the magma broke through overlying rock layers, its water content turned to steam, driving powerful eruptions that buried the surrounding area in layers of volcanic ash—hundreds of meters thick in some places. As ash and steam billowed overhead...

Full article: http://earthobservatory.nasa.gov/IOTD/view.php?id=50666&s...

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Valle Caldera, New Mexico: Acquired May 22, 200...

earthobservatory.nasa.gov 21 May '11, 10pm

Spanning about 22 kilometers (14 miles), Valles Caldera in New Mexico was formed from the collapse of a magma chamber foll...

Valle Caldera, New Mexico: Acquired May 22, 200...

earthobservatory.nasa.gov 21 May '11, 10pm

Spanning about 22 kilometers (14 miles), Valles Caldera in New Mexico was formed from the collapse of a magma chamber foll...

U.S. Atlantic Seaboard at Night [image] #NASA

earthobservatory.nasa.gov 22 May '11, 10pm

As metropolitan areas expand in both physical area and population, they typically aggregate to form economically, politica...

Busy 2011 Fire Season in Mexico

earthobservatory.nasa.gov 24 May '11, 11pm

May usually marks the end of the fire season in Mexico. Sometime during the month, the first wet-season rains begin to fal...

Busy 2011 Fire Season in Mexico: The widespread...

earthobservatory.nasa.gov 24 May '11, 10pm

May usually marks the end of the fire season in Mexico. Sometime during the month, the first wet-season rains begin to fal...

NASA Earth Observatory - East Coast night lights:

earthobservatory.nasa.gov 24 May '11, 11pm

As metropolitan areas expand in both physical area and population, they typically aggregate to form economically, politica...

Arctic Snow and Ice Cool the Earth [image] #NASA

Arctic Snow and Ice Cool the Earth [image] #NASA

earthobservatory.nasa.gov 19 May '11, 12pm

Snow and ice play an important role in keeping our planet cool, though not in the way you might think. Snow and ice are br...

Horseshoe 2 Fire, Arizona: Taken May 15, 2011, ...

earthobservatory.nasa.gov 20 May '11, 10pm

The Horseshoe 2 fire, located along the southeastern flank of the Chiricahua Mountains in southeastern Arizona, began on M...

Horseshoe 2 Fire, Arizona: Taken May 15, 2011, ...

earthobservatory.nasa.gov 20 May '11, 10pm

The Horseshoe 2 fire, located along the southeastern flank of the Chiricahua Mountains in southeastern Arizona, began on M...

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earthobservatory.nasa.gov 29 May '11, 11pm

Natural Disasters and NASA - What Is The Agency's Role? An Interview with Michael Goodman May 17, 2011 Working with basic ...

Beautiful emerald & blue swirls glimpsed in New...

earthobservatory.nasa.gov 26 May '11, 12pm

Runoff from heavy rains, combined with wave action along the coast, increased the turbidity of New Zealand’s waters when t...