Hi Greg - Our first guess is Akutan, as much of the pumice from Akutan is an orangey-red and Akutan is proximal to Dutch Harbor. However, a better guess could come from asking NOAA for ocean current information, which may provide a sort of "back-trajectory" for the source. Hope this is helpful, Cheryl Cameron -------- Greg Peters wrote: There has been a large influx of fresh, redish colored pumice in the Dutch Harbor area in the past few days. Normally, the pumice here is either black or white, but this is more red. Hundreds of pieces are washing in. Do you know what volcano is the source? Thanks. Greg -- Cheryl Cameron Geologist, Alaska Volcano Observatory Alaska Division of Geological & Geophysical Surveys voice: 907-451-5012 fax: 907-451-5050