Description: From Neal and others (1996): "AVO received a flurry of calls on September 4, 27, and October 4, 1993 relaying pilot reports of vigorous steaming and on one occasion (September 4) 'possible ash' to 3 km. This was not confirmed by satellite imagery or ground observations of ashfall. On October 26, an experienced USFWS observer noted ash on the upper 300 m of the cone as well as a gray coloration to the plume emanating from the summit crater. More pilot reports of steaming were received on October 28. On October 29, USFWS personnel in Cold Bay reported the steam plume was perhaps 'darker and more vigorous' than usual; NWS also relayed a pilot report of steam to 20,000 ft. Again, no satellite or ground detection of distant ashfall were noted.