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Trident volcano

Updated: Feb 23, 2024 13:08 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)
Last update: 11 Jan 2024 (alert level diminished to Green)

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Typical eruption style: unspecified
Trident volcano eruptions: 1974 

Latest nearby earthquakes

TimeMag. / DepthDistance/Location
Feb 16, 10:54 am (Anchorage)
Feb 16, 19:54 GMT

1.1

1.2 km
3.2 km (2 mi) to the NW Lake and Peninsula, 105 mi west of Kodiak, Kodiak Island Borough, Alaska, USA More
Feb 16, 10:52 am (Anchorage)
Feb 16, 19:52 GMT

1.1

3.8 km
3.6 km (2.3 mi) to the W Lake and Peninsula, 106 mi west of Kodiak, Kodiak Island Borough, Alaska, USA More
Sunday, February 11, 2024 GMT (1 quake)
Feb 11, 03:35 am (Anchorage)
Feb 11, 12:35 GMT

1.6

250 km
19 km (12 mi) to the NE Lake and Peninsula, 99 mi northwest of Kodiak, Kodiak Island Borough, Alaska, USA More
Friday, February 9, 2024 GMT (2 quakes)
Feb 9, 11:25 am (Anchorage)
Feb 9, 20:25 GMT

1.3

32 km
2.7 km (1.7 mi) to the W Lake and Peninsula, 105 mi west of Kodiak, Kodiak Island Borough, Alaska, USA More
Feb 9, 11:24 am (Anchorage)
Feb 9, 20:24 GMT

1.0

34 km
1.6 km (1 mi) to the N Lake and Peninsula, 104 mi west of Kodiak, Kodiak Island Borough, Alaska, USA More
Sunday, February 11, 2024 GMT (1 quake)
Feb 11, 03:35 am (Anchorage)
Feb 11, 12:35 GMT

0.8

1.1 km
18 km (10.9 mi) to the W Lake and Peninsula, 112 mi west of Kodiak, Kodiak Island Borough, Alaska, USA More

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.
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Smithsonian / GVP volcano information


See also: Sentinel hub | Landsat 8 | NASA FIRMS
Thu, 11 Jan 2024, 07:35

Trident volcano (Alaska Peninsula): alert level diminished to Green

The activity of the volcano has waned over the past month. ... Read all
Wed, 26 Jul 2023, 08:46

Trident volcano (Alaska Peninsula): seismic swarm continues, uplift has reached 5 cm, likelihood of eruption increases

Katmai volcanic cluster (image: AVO)
The Alaska Volcano Observatory (AVO) reported that a significant increase in low-frequency earthquakes (both shallow and deep-level earthquakes) started to develop in the region of Katmai volcanic cluster since May this year. ... Read all
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