Vent of Southwest Trident eruption, which took place from 1953 to 1974 and formed several andesite lava flows and a new cone on the Southwest flank of Trident volcano in Katmai National Park and Preserve. The summit of this new cone is 4,970 ft (1,515 m) ASL.
| Date: | July 16, 2011 12:00 AM |
| Volcano(es): | Trident |
| Photographer/Creator: | McPherson, Pam |
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