We are getting questions about current earthquake activity in the western Aleutians—and with good reason. There are actually two different sequences of earthquakes unfolding right now in the Andreanof and Rat Islands. Both are pretty typical behavior, but they illustrate two different types of activity that we see frequently. Last Wednesday a M6.2 earthquake occurred near Tanaga Island. So far we have seen about 250 aftershocks. These will continue for weeks, but (barring another large earthquake) the number of quakes each day will continue to decrease. About 100 miles to the west, near Amchitka Pass, an unrelated swarm of earthquakes has been unfolding. This sequence is not as energetic but has spawned half a dozen M5+ earthquakes in the past day.