Eruption of Manam Volcano

Credit: Jeff Schmaltz; MODIS team; NASA, Posted on: Monday, 1 November 2004, 08:02 CST Download full size image

The island of Manam sits in the Bismarck Sea across the Stephan Strait from the east coast of mainland Papua New Guinea. Only 10 kilometers wide, the island was created from the activity of the Manam Volcano, one of the country’s most active. In this true-color image acquired by the Aqua MODIS instrument on October 24, 2004, a large brown ash plume has spread northwestward from an eruption of Manam, which is located at bottom right. The thermally active areas on the volcano (and elsewhere on the mainland) are outlined in red. The Manam Volcano has an interesting structure. Its 1,870-meter summit is bare and carved by four large avalanche valleys that radiate from the summit down the flanks. These valleys are spaced roughly 90 degrees apart around the cone-shaped mountain, and lava and pyroclastic debris flows have funneled through these valleys and reached the coast in past eruptions. The volcano has two summit craters, and both are active.

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