Trident Volcano
Updated: May 1, 2024 23:23 GMT -
Stratovolcano 1864 m / 6,115 ft
United States, Alaska Peninsula, 58.24°N / -155.1°W
Current status: normal or dormant (1 out of 5)
United States, Alaska Peninsula, 58.24°N / -155.1°W
Current status: normal or dormant (1 out of 5)
Last update: 11 Jan 2024 (alert level diminished to Green)
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Trident volcano eruptions: 1974
Latest nearby earthquakes
Time | Mag. / Depth | Distance / Location | |||
Apr 29, 01:14 pm (Anchorage) | 0.8 0.1 km | 88 km NW of Karluk, Alaska | Info | ||
Sunday, April 28, 2024 GMT (2 quakes) | |||||
Apr 28, 11:51 am (Anchorage) | 1.7 0 km | 10.6 km (6.6 mi) to the SW | 82 km NW of Karluk, Alaska | Info | |
Apr 28, 10:54 am (Anchorage) | 1.5 0.5 km | 16 km (9.8 mi) to the W | 88 km NW of Karluk, Alaska | Info | |
Friday, April 26, 2024 GMT (1 quake) | |||||
Apr 25, 10:36 pm (Anchorage) | 0.9 102 km | 65 km N of Karluk, Alaska | Info | ||
Tuesday, April 23, 2024 GMT (1 quake) | |||||
Apr 23, 03:27 am (Anchorage) | 0.9 98 km | 78 km NNW of Karluk, Alaska | Info | ||
Thursday, April 18, 2024 GMT (1 quake) | |||||
Apr 18, 01:04 pm (Anchorage) | 1.1 1.1 km | 3.6 km (2.2 mi) to the W | 85 km NNW of Karluk, Alaska | Info |
Background
The Trident stratovolcano cluster was named for the three prominent peaks that were the most visible features at the summit prior to 1953. The andesitic-dacitic Trident group consists of four overlapping stratovolcanoes and numerous flank lava domes, including Falling Mountain and Mt. Cerberus on the far west flank. The summit complex of Trident is located 3-5 km SE of Novarupta volcano, and merges along a ridge to the NE with Katmai volcano. The three oldest Trident volcanoes are glaciated and Pleistocene in age, while the youngest, Southwest Trident, was formed during historical time. Eruptions at the Trident complex migrated stepwise with time from the NE to the SW. In 1953 a new lava dome began growing on the SW flank of Trident I volcano. A series of thick andesitic lava flows were erupted between 1953 and 1968, forming a cone with 400-800 m of local relief. Periodic explosions took place until 1974, and the current summit contains a 350-m-wide crater. Some of the distal lava flows from West Trident stratovolcano collapsed into the Novarupta vent during its 1912 eruption.---
Smithsonian / GVP volcano information