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After 10 days of relative calm, Alaska's Augustine Volcano erupted twice Friday, three times Saturday and once on both Sunday and Monday. Here, a view of the volcano on Jan. 24, 2006. The photo looks toward Augustine's south flank, located in south-central Alaska about 175 miles southwest of Anchorage. The volcano, 4,134 feet tall, poses a hazard to Anchorage and the trans-Pacific air traffic around it.
Vesicular ash particles
A microscopic image of vesicular ash particles from the Augustine volcano eruption on Jan. 13, 2006. The ash sample was collected during the ashfall in Homer, Alaska, by John Paskievitch of the Alaska Volcano Observatory, which maintains a special page detailing Augustine's activity. Before this month, Augustine's previous eruptive periods occurred in 1976 and 1986.