Tag: Nabro

UPDATE: more amazing Nabro volcano images

By Phil Plait | June 30, 2011 6:20 pm

A couple of days ago I posted an amazing satellite image of Nabro, an erupting volcano in Eritrea. Today, NASA released follow-up images from the Earth Observing-1 satellite, and they’re also very, very cool.

This first one is false color, and is a combination of far infrared, near infrared, and visible light. The warm, recently deposited lava is fairly obvious. You can also see the ash plume and some clouds. Note the scale bar in the lower left.

The second image is in visible light, and is a more natural color:

Nifty! Since we don’t see in infrared, the lava is not glowing, and appears brownish. Interestingly, the active vent is easier to spot in this shot because the lava is not as distracting.

You can read my earlier post for more info on the volcano. These images are just about the only data scientists are getting on it since it’s located in a difficult-to-reach region. But then, what’s difficult when you have satellites designed to look down at exactly these sorts of things?

[UPDATE: Vulcanologist Erik Klemetti has written an article for The Big Think about this eruption with lots of sciencey goodness.]

Credit: NASA/EO-1/Robert Simmon

CATEGORIZED UNDER: Cool stuff, Pretty pictures
MORE ABOUT: EO-1, Eritrea, Nabro, volcano

Staring down an active volcano's throat

By Phil Plait | June 28, 2011 6:02 am

I have seen some amazing volcano pictures in my time, but this one just released by NASA is way, way up on the list of pure, freaking, awesome:

[Click to hephaestenate.]

That spectacular image is from the Earth Observing-1 satellite, and shows the Nabro volcano in Eritrea, a country bordering the Red Sea on the horn of Africa. The volcano has been erupting for a couple of weeks, but its isolated location has made it difficult to get observations from the ground. The best views have been from satellites like EO-1.

This picture, taken on June 24, is false color; red is actually near-infrared, showing the intense heat generated by the lava in the caldera and flowing off to the northwest (upper left). The blue cloud is likely water vapor, and additional clouds are from gases escaping from the cooling lava. The caldera crater is obvious, and to give you a sense of the scale of this beast is about 6 km (3.6 miles) across.

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CATEGORIZED UNDER: NASA, Pretty pictures, Science

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