Three Rumbling Volcanoes: Little Sitkin, Reclus and Tangkubanparahu

A view of Little Sitkin in Alaska as seen from a boat on September 28, 2005. Image by C.A. Neal courtesy of AVO/USGS. This week has seen three lesser-known volcanoes move to a higher alert status after increasing restlessness. Little Sitkin This morning, the Alaska Volcano Observatory moved Little Sitkin to Yellow Alert status after a sharp increase in seismicity started yesterday and continued through the night. To their knowledge, nothing has occurred at Little Sitkin beyond this increase in earthquakes, but apparently this activity was enough for them to raise the alert. Like many Alaska volcanoes, Little Sitkin is a stratovolcano sitting within an older caldera system that has not erupted in over 180 years, although fumarolic activity is common in the caldera and on Little Sitkin itself. The volcano is remote - way out in the Aleutian Islands - so the main hazard is to the air traffic ...