Here we go again...

Intense siesmic activity hundreds of meters below the surface of one of Iceland's largest glaciers could potentially indicate that yet another volcanic eruption could be imminent, experts suggest. The Katla volcano is long overdue, and may cause the largest eruption that the country has seen in a century.

Reports of 500 tremors in October alone is worryingly unusual, and could suggest the movement of magma. The volcano holds an impressive record of being totally destructive, unimaginably powerful and highly active. Thanks to extensive evidence that has been documented for the past 1,000 years, volcanologists can predict that it usually erupts every 40 to 80 years. The last major eruption occured in 1918, and caused an extremely large glacier meltdown; ice bergs were swept into the ocean by the resulting floods. The largest eruption occured in 1755, when the amount of water produced was equal to all of the worlds largest rivers combined.

The volcano cannot be underestimated. Especially when you think back to the "small" eruption that shut down the worlds airports for a week last year. Of course, volcanoes are erupting around the world constantly; scientists are particuarly curious about an underwater volcano which is creating new land. But this could be bigger, stronger and (given that the volcano hasn't errupted in over 90 years) ultimatley more powerful than anything we've seen.