Etorofu-Atosanupuri [Atosanupuri]
About Etorofu-Atosanupuri [Atosanupuri]
The conical Etorofu-Atosanupuri stratovolcano forms a peninsula joined to the SW side of Iturup (Etorofu) Island by an isthmus 30 m high. A somma volcano whose caldera rim is exposed only at about 900 m elevation on the SE side was constructed during the late Pleistocene or early Holocene, forming an island up to about 1.5 km high that was later connected to the main island by erosional material. A fault with large displacement offsets the NW side of the somma. The 2-km-wide caldera was subsequently largely overtopped by a central cone that forms the present summit. Strombolian eruptions have dominated the history of this basaltic volcano; few lava flows are exposed. Eruptions were reported in 1812 and 1932.
Eruption reports
Reports from GDACS and NASA EONET linked to this volcano.
No eruption reports in our records yet. New reports appear here automatically.
Earthquakes nearby, 30 days
Within about 50 km. Swarms of small quakes can sometimes accompany volcanic unrest.
No earthquakes recorded nearby in the last 30 days.