The Puyehue volcano in Chile erupted on June 4, 2011, after being dormant for over 50 years. Thousands of residents were evacuated and airlines in Chile, Argentina and New Zealand cancelled flights after the ash plume rose over 10 km and drifted across the western southern hemisphere.

Landsat 5 collected data on two occasions on June 26, 2011. At 3:19 GMT a night image was collected, as illustrated by a black & white thermal band image. The lava flow shows as a bright spot on the volcano. The ash plume and the surrounding lakes are differentiated from surrounding clouds and land cover.

At 14:24 GMT another scene was collected, as shown in the color image of the visible, near-infrared and short wave infrared bands of the same area. Clouds, snow caps, lakes and vegetation differences are more clearly identified.

While the residents have, in the past few days, been allowed to return scientists are monitoring the site and are concerned there may be another eruption in the near future.

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Wednesday, July 6, 2011