Additional Report for Ryukyu Pumice

Pumice Rafts (Ryukyu Islands)

Ryukyu Islands, Japan


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06/1986 (SEAN 11:06) Discolored seawater


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All information contained in these reports is preliminary and subject to change.

06/1986 (SEAN 11:06) Discolored seawater

Pumice rafts have been drifting ashore in the Ryukyu Islands from late May through June 1986. Pumice was observed by JMA weather station personnel on eight islands: Amami-Oshima, Okinawa, Kume, Minami-Daito, Miyako, Ishigaki, Yonaguni, and Iriomote. More pumice has been observed on E coasts (Pacific coasts) than W coasts of the islands. The coarsest pumice was ~20 cm in diameter on Okinawa, but most of the pumice was small. On most islands, some pumice carried shellfish on the surface. No recent eruptions have been reported at volcanoes in and near the Ryukyu Island chain, and the source of the pumice is unknown.

Information Contact: JMA.