Wednesday 1 January 2014

Volcanos

Roundup of Global Volcanic Activity:

El Hierro (Canary Islands, Spain): It seems more and more likely that the crisis is appraching an end (with the likelihood of a new eruption soon becoming less and less). Seismic activity has decreased to normal levels with no unusual signs over the past 24 hours. Deformation has been stagnating or mostly reverted to deflation at most stations.

Suwanose-jima (Tokara Islands, Japan): The volcano continues to produce frequent and intense strombolian explosions and produces a low level ash plume.

Sinabung (Sumatra, Indonesia): More and increasingly larger (and hence more dangerous) pyroclastic flows are being formed by the growing lava dome of the volcano. These "flows" are hot turbulent avalanches of hot blocks and ash in suspension with hot gas and air, that can travel down at great speed the slopes of the mountain, typically following the paths of valleys. Today, one of the pyroclastic flows reached a distance of 3000 m, ie. the lower slopes. It needs to be pointed out that anything living in the path of these flows is killed, and even larger structures usually destroyed or completely burned. The exclusion zone of 5 km currently in place seems clearly to be too small.

Dukono (Halmahera): Elevated explosive activity continues at the remote volcano. Ash plumes up to 12,000 ft (3.6 km) altitude were spotted on satellite data by VAAC Darwin.

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