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Magma generated by subduction feeds volcanoes - and eventually volcanic islands - over the subduction boundary.Paramushir Island in the northern Kurils is an example of a large island built by several volcanoes over geologic time.However, with limited staff and resources, we simply cannot respond to all who write to us.

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A minor eruption of ash following an earthquake occurred on this part of the island in 1952.

The Lomonosov Group to the northeast (image center) includes four cinder cones and a lava dome.

Prior to 12 June, the last explosive eruption had occurred in 1989 with eruptions in 1986, 1976, 1954, and 1946 also producing lava flows.

This detailed photograph is exciting to volcanologists because it captures several phenomena that occur during the earliest stages of an explosive volcanic eruption.

The main column is one of a series of plumes that rose above Matua Island on June 12.

The plume appears to be a combination of brown ash and white steam.

While most are not actively erupting, many are considered dangerous due to their eruptive history and proximity to population centers and air travel corridors.

This astronaut photo highlights the summit crater and snow-covered slopes of Avachinshy stratovolcano (2,741 m; 8,993 ft) as it pokes above a surrounding cloud deck.

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The structure also indicates that little or no shearing winds were present at the time to disrupt the plume.

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