Trident vulcano
Aggiornato: 3 feb. 2023 06:55 GMT -
Stratovolcano 1864 m / 6,115 ft
United States, Alaska Peninsula, 58.24°N / -155.1°W
Stato attuale: normal or dormant (1 di 5)
United States, Alaska Peninsula, 58.24°N / -155.1°W
Stato attuale: normal or dormant (1 di 5)
Last update: 20 ott 2022 (alert status lowered to Green)
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Eruzioni del vulcano Trident: 1974
Latest nearby earthquakes
| Data / ora | Mag. / Prof. | Distanza/Ubicazione | ||
| venerdì, 27 gennaio 2023 GMT (1 sismo) | ||||
| 26 gen 2023 20:26 (GMT -9) (27 gen 2023 05:26 GMT) | 2.3 3.1 km | 5.5 km (3.4 mi) 99 km a sud-est da King Salmon, Borough di Bristol Bay, Alaska, Stati Uniti | ||
| giovedì, 26 gennaio 2023 GMT (1 sismo) | ||||
| 26 gen 2023 09:53 (GMT -9) (26 gen 2023 18:53 GMT) | 2.7 37 km | 4.5 km (2.8 mi) 100 km a sud-est da King Salmon, Borough di Bristol Bay, Alaska, Stati Uniti | ||
| lunedì, 23 gennaio 2023 GMT (1 sismo) | ||||
| 23 gen 2023 10:12 (GMT -9) (23 gen 2023 19:12 GMT) | 1.8 | 18 km (11 mi) 93 km a sud-est da King Salmon, Borough di Bristol Bay, Alaska, Stati Uniti | ||
| domenica, 22 gennaio 2023 GMT (1 sismo) | ||||
| 21 gen 2023 22:13 (GMT -9) (22 gen 2023 07:13 GMT) | 1.5 0.6 km | 17 km (10.6 mi) 87 Km NW of Karluk, Alaska | ||
| sabato, 21 gennaio 2023 GMT (1 sismo) | ||||
| 21 gen 2023 05:40 (GMT -9) (21 gen 2023 14:40 GMT) | 2.5 | 4.9 km (3 mi) 99 km a sud-est da King Salmon, Borough di Bristol Bay, Alaska, Stati Uniti | ||
Sfondo
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
See also: Sentinel hub | Landsat 8 | NASA FIRMS
