Anchorage International Airport was closed for 20 hours because of the ashfall. Southwesterly winds carried the ash cloud across upper Cook Inlet, narrowly missing Anchorage, up the Matanuska Valley and across eastern Alaska. Photographs taken from the Space Shuttle several days later show the thin but undispersed ash cloud over western Quebec, Canada. Bulk tephra volume was about 56 x 106 m3. Seismicity gradually declined through the first half of 1993 to near-background levels.
Some samples contain rare subhedral, heavily oxidized hornblende.