|Start:||September 30, 1997 ||Observed|
|Debris-avalanche, volcanic avalanche, or landslide: ||
|Eruption Type:||Not an eruption.|
From McGimsey and Wallace (1999): "A Copper Center resident reported a large steam cloud rising from the southwest face of Mt. Sanford on September 30, 1997. The cloud persisted throughout the afternoon before dissipating. Based on previous similar activity, AVO staff concluded that the cloud resulted from avalanching or debris fall from the southwest face."