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Segula volcano

Stratovolcano 1160 m / 3,806 ft
United States, Aleutian Islands, 52.02°N / 178.14°E
Current status: dormant (1 out of 5)
Segula volcano books
Typical eruption style: unspecified
Segula volcano eruptions: unknown, no recent eruptions
TimeMag. / DepthDistanceLocation
Thu, 9 Mar
Thu, 9 Mar 02:26 UTCM 5.3 / 121.9 km52 km- 19km NNW of Little Sitkin Island, Alaska
Tue, 7 Mar
Tue, 7 Mar 14:23 UTCM 5.0 / 101 km13 kmRat Islands, Aleutian Islands
Fri, 3 Mar
Fri, 3 Mar 01:59 UTCM 2.7 / 114.3 km15 km- 14km SSE of Little Sitkin Island, Alaska
Tue, 28 Feb
Tue, 28 Feb 04:19 UTCM 3.4 / 103.2 km12 km- 11km S of Little Sitkin Island, Alaska
View all recent quakes

Background:

The 6 x 7 km island of Segula east of Kiska volcano consists of a conical stratovolcano cut by a prominent NNW-SSE-trending fissure that extends to sea level at both ends of the island. The northern end of the fissure is flooded by the sea to produce a long, narrow cove. Segula was constructed above a 100-m-deep submarine platform that extends eastward to Khvostof and Davidof islands. A submarine debris-avalanche deposit extends up to 18 km offshore to the north. The summit of Segula contains a small, poorly defined caldera that is partly overtopped on the south by a cinder cone that forms the 1153 m high point of the island and on the north by extensive lava flows that reach the NE coast along a broad front. Another lava field on the SE coast originated from a cinder cone at 300 m altitude on the SE flank. No historical eruptions are known from Segula, but Nelson (1959) considered fresh lava flows on the north flank to possibly be only a few hundred years old.
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Smithsonian / GVP volcano information


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