Contact | RSS | EN | DE | EL | ES | FR | IT | RU

Tanaga Volcano

Updated: 29 mars. 2024 04:39 GMT -
Stratovolcanoes 1806 m / 5,925 ft
Aleutian Islands, 51.89°N / -178.15°W
Condition actuelle: normal / en sommeil (1 sur 5)
Last update: 22 juil. 2023 (Smithsonian / USGS Weekly Volcanic Activity Report)

Tanaga volcano is the second largest volcano of the central Aleutians. It is the central and highest of 3 young stratovolcanoes oriented along a roughly E-W line at the NW tip of Tanaga Island.

[smaller] [larger]
Style éruptif tipique: unspecified
Eruptions du volcan Tanaga: 1914

Derniers séismes proches

HeureMag. / ProfondeurDistance / Lieu
22 mars 07:48 (Adak)
22 mars. 16:48 GMT
1.1

13 km
7.7 km au sud 106 km W of Adak, Alaska Info
lundi, 18 mars 2024 GMT (1 séisme)
18 mars 14:01 (Adak)
18 mars. 23:01 GMT
1.1

6.9 km
16 km à l'est 87 km W of Adak, Alaska Info
samedi, 16 mars 2024 GMT (1 séisme)
15 mars 22:37 (Adak)
16 mars. 07:37 GMT
0.9

3.2 km
24 km à l'est 80 km W of Adak, Alaska Info
mardi, 26 mars 2024 GMT (1 séisme)
26 mars 14:19 (Adak)
26 mars. 23:19 GMT
0.7

2.8 km
25 km à l'est 79 km W of Adak, Alaska Info
mercredi, 20 mars 2024 GMT (1 séisme)
20 mars 13:51 (Adak)
20 mars. 22:51 GMT
0.7

3.5 km
14 km à l'est 90 km W of Adak, Alaska Info
dimanche, 17 mars 2024 GMT (1 séisme)
17 mars 10:11 (Adak)
17 mars. 19:11 GMT
0.6

5.6 km
20 km à l'est 84 km W of Adak, Alaska Info

Introduction

Arcuate ridges to the east and south represent the rim of an arcuate caldera formed by collapse of an ancestral Tanaga volcano during the Pleistocene. Most Holocene eruptions originated from Tanaga volcano itself, which consists of two large cones, the western of which is the highest, constructed within a caldera whose 400-m-high rim is prominent to the SE. At the westernmost end of the Tanaga complex is conical Sajaka, a 1304-m-high double cone that may be the youngest of the three volcanoes. Sajaka One volcano collapsed during the late Holocene, producing a debris avalanche that swept into the sea, after which Sajaka Two cone was constructed within the collapse scarp.
---
Smithsonian / GVP volcano information

Latest satellite images

tanaga satellite image sat1tanaga satellite image sat2
sam., 22 juil. 2023, 16:05

Tanaga (United States) - Smithsonian / USGS Weekly Volcanic Activity Report for 12 July-18 July 2023

AVO reported that earthquake activity near Tanaga had decreased in both rate and magnitude. The rate of earthquakes had been about three events per day during the previous three weeks, much lower than the 150 events per day recorded during the peak of the swarm in mid-March. Recent satellite images did not indicate any deformation on the island and no other signs of volcanic unrest had been detected. ... Read all
mer., 19 juil. 2023, 14:00

Tanaga volcano (Andreanof Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 12 July-18 July 2023 (Continuing Activity)

AVO reported that earthquake activity near Tanaga had decreased in both rate and magnitude. The rate of earthquakes had been about three events per day during the previous three weeks, much lower than the 150 events per day recorded during the peak of the swarm in mid-March. Recent satellite images did not indicate any deformation on the island and no other signs of volcanic unrest had been detected. ... Read all

Sur cette page: