A still from a video documenting a violent explosive eruption at volcan Puyehue, Chile on January...

Please excuse the poor image quality - this is a still from an HD

video that I recorded 1 km from the vent. We are using the video to

track the velocity of bombs and the how the behaviour of the vent

changes through time. I quite liked this still as it shows a fresh

burst of glowing red fragmented magma flying through the billowing

cloud of fine-grained ash.