This is a questionable event.| Start: | July 1971 | Observed |  |
| Stop: | July 1971 | Observed |  |
| Tephra plume: |
|
| Eruption Type: | Explosive | |
| MaxVEI: | 2 |  |
| Duration: | 1 evening |  |
Description: From Miller and others (1998): "Mr. Odon Soeth reported observing an ash eruption in July, 1971 from Port Heiden, 100 km southwest of Chiginagak; according to Mr. Soeth, the eruption lasted only one evening."