Segula Volcano
Updated: Mar 28, 2024 16:54 GMT -
Stratovolcano 1160 m / 3,806 ft
United States, Aleutian Islands, 52.02°N / 178.14°E
Current status: normal or dormant (1 out of 5)
United States, Aleutian Islands, 52.02°N / 178.14°E
Current status: normal or dormant (1 out of 5)
[smaller] [larger]
Segula volcano eruptions: unknown, no recent eruptions
Latest nearby earthquakes
Time | Mag. / Depth | Distance / Location | |||
Mar 21, 10:15 am (Adak) Mar 21, 19:15 GMT | 0.7 4.8 km | 20 km (12 mi) to the E | Rat Islands, Aleutian Islands, Alaska | Info |
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.---
Smithsonian / GVP volcano information