Bogoslof Volcano - John Seach


Aleutian Islands, Alaska

53.93 N, 168.03 W
summit elevation  150m
stratovolcano volcano

Bogoslof volcano is located in the Aleutian Islands, Alaska. It is situated 40 km north of the main volcanic arc.

Bogoslof is the top of a submarine volcano which rises 5000 m from the sea floor. The island was first seen by by Russian navigators in 1768, and James Cook in 1778. The volcano was was destroyed by marine erosion toward the end of the 1800's.

1992 Eruption
An eruption of Bogoslof volcano on 6th July 1992. On 14th July a plume extended 100 km SE of the volcano. On 20th July ash reached 8 km altitude. A lava dome was extruded on the northern end of the island, extending the land.

1951 Activity
Three kilometers of muddy water was observed from a ship near Bogoslof Island in September 1951. This may have come from a submarine eruption.

1926-1928 Eruptions
Basaltic ash was erupted in 1926, and a basalt dome (34) extruded in
early 1927.

Activity from 1906-1910
Domes were extruded in 1906, 1907, and 1910, but they were destroyed by eruptions and marine erosion.

1796 Eruption
An andesite dome known as "Old Bogoslof" was extruded in 1796 after a violent eruption. The remnant of the dome is known as Castle Rock, and is located in the SW part of Bogoslof Island.

Bogoslof Volcano Eruptions

1992, 1951?, 1931, 1926-28, 1913?, 1909-10, 1908?, 1906-07, 1883-95, 1806-23, 1796-1804