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Sci-fi pictures from Mars April 13, 2009

Posted by Sarah in geology, science, space.
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marsdunes1

Via the Bad Astronomer, some eery pictures from the surface of Mars that look straight out of a sci-fi flick. The images were taken by the HiRise camera on board the Mars Reconnaissance Orbiter. Another brilliant recent addition to the HiRise image archive is this one: (more…)

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Alaskan volcano erupts March 25, 2009

Posted by Sarah in geology, pics, science.
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Location of Mt. Redoubt (Image: J. Schaefer/AVO/ADGGS)

It’s a good week for gelogy nerds. After last week’s undersea volcanic eruption in the South Pacific, the Alaskan volcano Mt. Redoubt erupted violently several times last weekend, and continues to rumble. Ash clouds rose to about 16 km according the Alaskan Volcano Observatory (AVO) and the eruption caused significant flooding (see this cool picture). The Alaskan volcanoes form part of the Pacific Ring of Fire which is littered with active volcanoes and a frequent site for earthquakes and eruptions.

Check out the AVO page on Redoubt for updates or follow on Twitter.

**Update, 29/03/09** Redoubt isn’t done erupting yet, more explosive eruptions took place in the last couple of days. The AVO Twitter feed is the best way of keeping up to date!

Webcam image of Redoubt erupting on Saturday. (Image: AVO/USGS)

Webcam image of Redoubt erupting on Saturday. (Image: AVO/USGS)

**Update, 30 March 09**. Explosive eruptions have continued at Redoubt in thel last few days and AVO is reporting the first ash falling on Achorage. There’s no danger to the population though. More spectacular pictures have appeared on the AVO website, this one is particularly striking.

Lightning during one of Redoubt's eruption events on 28 March (image credit: Higman, Bretwood)

Lightning during one of Redoubt's eruption events on 28 March (image credit: Higman, Bretwood)

Big Picture: Volcano violence March 21, 2009

Posted by Sarah in geology, pics, science.
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tonga

The Big Picture series in the Boston Globe has had two awesome features this week. The first is a series of photos of the undersea volcano that erupted near the South Pacic island group of Tonga, triggering a series of earthquakes and a tsunami warning. The Guardian is reporting today that the eruption has created a new landmass in the Tongan archipelago. Amazing! The Earth can kick our asses any day.

Image credit: AP Photo/Trevor Gregory