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Kanaga Volcano

Updated: 19 avril. 2024 23:26 GMT -
stratovolcano 1307 m / 4,288 ft
Andreanof Islands, Aleutian Islands, Alaska , 51.92°N / -177.17°W
Condition actuelle: normal / en sommeil (1 sur 5)
Last update: 28 févr. 2024 (alert level downgraded to Green)
Kanaga Volcano Viewed from the west with Mt Moffet, Adak and Great Sitkin in the background (image taken May 8, 2010 by Cyrus Read, AVO/USGS)
Kanaga Volcano Viewed from the west with Mt Moffet, Adak and Great Sitkin in the background (image taken May 8, 2010 by Cyrus Read, AVO/USGS)

Kanaga volcano is an active symmetrical stratovolcano rising 1300 m on the northern part of Kanaga Island in the western Aleutians, Alaska. It is one of the most southerly volcanoes of the central Aleutian chain.
The volcano has a small 200 m wide and 60 m deep circular summit crater with fumaroles inside the crater and around its rims. Historical eruptions have been recorded since 1763, but not in much detail due to the remoteness of the volcano. A new eruption might have started on 18 February 2012.

[smaller] [larger]
Style éruptif tipique: explosive
Eruptions du volcan Kanaga: 2012 (?), 1993-95, 1942, 1933, 1906, 1904, 1829 (?), 1791 (?), 1790 (?), 1783-87 (?), 1768, 1763

Derniers séismes proches

HeureMag. / ProfondeurDistance / Lieu
19 avril 07:05 (Adak)
3.6

4.8 km
27 km au sud-ouest 58 km WSW of Adak, Alaska  I FELT IT
Info
18 avril 17:19 (Adak)
2.9

10 km
29 km au sud-ouest 59 km WSW of Adak, Alaska  I FELT IT
Info
mercredi, 17 avril 2024 GMT (2 séismes)
17 avril 01:44 (Adak)
2.8

9.2 km
29 km au sud-ouest 60 km WSW of Adak, Alaska  I FELT IT
Info
17 avril 01:40 (Adak)
2.7

9 km
29 km au sud-ouest 59 km WSW of Adak, Alaska  I FELT IT
Info
dimanche, 14 avril 2024 GMT (1 séisme)
14 avril 14:24 (Adak)
2.5

14 km
28 km au sud 40 km WSW of Adak, Alaska
Info
mardi, 16 avril 2024 GMT (1 séisme)
15 avril 20:04 (Adak)
2.3

4.5 km
29 km au sud-ouest Andreanof Islands, Aleutian Is.
Info

Introduction

Symmetrical Kanaga stratovolcano is situated within the Kanaton caldera at the northern tip of Kanaga Island. It is composed of interbedded basaltic and andesitic lava flows, scoria layers, and pyroclastic rocks.
The rim of Kanaton caldera forms a 760-m-high arcuate ridge south and east of Kanaga; a lake occupies part of the SE caldera floor. The volume of subaerial dacitic tuff is smaller than would typically be associated with caldera collapse, and deposits of a massive submarine debris avalanche associated with edifice collapse extend nearly 30 km to the NNW. Several fresh lava flows from historical or late prehistorical time descend the flanks of Kanaga, in some cases to the sea.
Kanaga is also noted petrologically for ultramafic inclusions within an outcrop of alkaline basalt SW of the volcano. Fumarolic activity occurs in a circular, 200-m-wide, 60-m-deep summit crater and produces vapor plumes sometimes seen on clear days from Adak, 50 km to the east.
(Smithsonian / GVP volcano information)

Eruptions du volcan Kanaga



1994-95 eruption
Jusqu'en 2012, la dernière éruption de Kanaga en 1994-1995 lorsqu'on les observe panaches éruptifs étaient relativement diluées, augmentait à une altitude de moins de 3 km (9 840 pieds), cendres de chute sur les flancs du volcan. Plus grandes émissions de cendres atteignant jusqu'à 7,5 km a eu lieu le 21 février 1995. ...plus d'info

1906 eruption
Kanaga a été vu en éruption 1906, un chasseur signalé. L'éruption a été accompagnée par des séismes et des coulées de lave ont été signalés sur le côté est et ouest du cône du volcan raide de.

1904 eruption
Pas beaucoup est connu au sujet de l'éruption du volcan Kanaga en 1904. Des documents historiques suggèrent une coulée de lave sur le flanc supérieur du sud.

Latest satellite images

Kanaga satellite image sat1Kanaga satellite image sat2
mer., 28 févr. 2024, 05:28

Kanaga volcano (Aleutian Islands, Alaska): alert level downgraded to Green

Kanaga volcano as seen from the webcam on 26 Feb (image: AVO)
The Alaska Volcano Observatory reported that the seismic unrest at the volcano has decreased over the past weeks. ... Read all
mer., 10 janv. 2024, 15:00

Kanaga volcano (Andreanof Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 3 January-9 January 2024 (New Activity / Unrest)

AVO reported that unrest at Kanaga continued during 3-9 January; no new eruptive activity was evident in satellite and webcam images. Small daily earthquakes were detected until 2 January when a storm-related power failure took local monitoring data offline. Satellite radar images showed that large NW-SE-trending fractures intersecting the summit crater had likely formed around the time of the 18 December explosive event. ... Read all

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