Akutan – stratovolcano, United States

Eruption history

VEI – Volcanic Explosivity Index: 0 = lava outpouring, 4 = like Eyjafjallajökull 2010, 6 = like Pinatubo 1991, 7 = like Tambora 1815. The scale is logarithmic – each step is about 10 times more material.

Start	End	VEI	Vent and dating
18 December 1992	18 December 1992	1	Observations: Reported
8 March 1992	21 May 1992	2	Observations: Reported
15 September 1991	29 October 1991	2	Observations: Reported
6 September 1990	1 October 1990	2	Observations: Reported
26 January 1990	26 January 1990	2	Observations: Reported
27 February 1989	28 March 1989	2	Observations: Reported
26 March 1988	20 July 1988	2	Observations: Reported
31 January 1987	24 June 1987	2	Observations: Reported
18 March 1986	30 June 1986	2	Observations: Reported
5 October 1982	16 May 1983	2	Observations: Reported
3 July 1980	8 July 1980	2	Observations: Reported
25 September 1978	16 October 1978	2	Observations: Reported
15 October 1976	9 May 1977	2	Observations: Reported
11 February 1974	—	2	West flank ? · Observations: Reported
16 March 1973	16 May 1973	2	Observations: Reported
5 November 1962	—	2	Observations: Reported
2 July 1953	—	2	Observations: Reported
16 October 1951	—	2	Observations: Reported
29 April 1948	7 August 1948	2	Observations: Reported
16 December 1946	16 January 1947	2	Observations: Reported
16 May 1931	16 August 1931	2	Observations: Reported
16 May 1929	—	2	Observations: Reported
2 July 1927	2 July 1928	2	Observations: Reported
2 July 1911	—	2	Observations: Reported
22 February 1908	—	0	Observations: Reported
2 July 1907	—	?	Observations: Reported
2 July 1896	—	?	Observations: Reported
1 August 1895	14 August 1895	2	Observations: Reported
23 September 1892	—	1	Observations: Reported
2 July 1887	—	0	Observations: Reported
2 July 1883	—	2	Observations: Reported
2 July 1867	—	?	Observations: Reported
2 July 1865	—	?	Observations: Reported
2 July 1852	—	?	NW flank (Lava Point) · Observations: Reported
5 March 1848	—	2	Observations: Reported
1420 ± 100 years	—	?	Isotopic: 14C (calibrated)
c. 550	—	?	Isotopic: 14C (uncalibrated)
c. 340	—	5	Isotopic: 14C (uncalibrated)
c. 4,150 BCE	—	?	Isotopic: 14C (uncalibrated)
7,620 BCE ± 300 years	—	?	Isotopic: 14C (calibrated)

Data: Global Volcanism Program, Smithsonian Institution (#311320)