Great Sitkin reported activity

Event Name : Great Sitkin 1945/3

Start:

March 1945

Observed

Lava flow:
Lava dome:
Subglacial:
Central eruption:

Eruption Type:	Explosive
MaxVEI:	2
Eruption Product:	andesite
Chem	Yes
Other	mafic

Description: From Simons and Mathewson (1947): "Extrusion of the crater dome marks the latest phase of activity. The dome is thought to have formed in March, 1945, at which time a glow was visible at night from Adak Island, and Army aviators noticed clouds of steam rising from the crater. During that month a strong earthquake was felt at Sand Bay."

From Coats (1950): lava flow or plug dome, some explosive activity at Great Sitkin in 1945.

Robinson (1948) includes a picture of the 1945 lava dome at Great Sitkin, captioned: "Mass of hot lava pushing up through snow in Great Sitkin Crater, may menace a near-by Navy fueling station. The dome of molten rock, half a mile in diameter, pushed and melted its way up through the white blanket in March, 1945, cracking the snow around its periphery. Steam rises from snow being melted by the lava."

Newhall and Melson (1983) estimate the volume of this dome at about 10 x 10^6 cubic meters.