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Papua Nugini · Stratovolkan

Yomba

Hankow Reef

Tipe
Stratovolkan
Ketinggian
5 m (bawah laut)
Letusan terakhir
Tidak diketahui
Hankow Reef is partially truncated just below the upper left corner of the cloud-covered portion of this NASA Landsat composite image (with north to the top). The possible existence of a now-submerged volcano named Yomba off the coast of Papua New Guinea is inferred from oral tradition and is considered to likely be at the location of Hankow Reef. The reef lies SE of Bagabag Island (upper left) and NW of Long Island, the larger island at the lower right. Crown Island lies beneath the cloud cover between Long Island and Hankow Reef.
Hankow Reef is partially truncated just below the upper left corner of the cloud-covered portion of this NASA Landsat composite image (with north to the top). The possible existence of a now-submerged volcano named Yomba off the coast of Papua New Guinea is inferred from oral tradition and is considered to likely be at the location of Hankow Reef. The reef lies SE of Bagabag Island (upper left) and NW of Long Island, the larger island at the lower right. Crown Island lies beneath the cloud cover between Long Island and Hankow Reef. · Foto: NASA Landsat 7 image (worldwind.arc.nasa.gov)
Tipe
Stratovolkan
Negara
Papua Nugini
Wilayah
Pasifik Barat Daya / Bismarck Volcanic Arc
Ketinggian
5 m (bawah laut)
Koordinat
-4.883, 146.717
Letusan terakhir
Tidak diketahui
Kondisi tektonik
Zona subduksi / Kerak benua (> 25 km)
Bentuk lahan
Komposit
Batuan utama
Tidak ada data
Ringkasan geologi

Oral tradition suggests the possible existence of a now-submerged volcano off the coast of Papua New Guinea. Accounts from many villages along the Madang coast report that residents fled from Yomba Island 8-10 generations ago, when the island was destroyed by an eruption accompanied by a tsunami. The location of the former island is uncertain, but most informants placed it in the vicinity of the present-day Hankow Reef (Mennis, 1981), between Bagabag and Crown Islands, NW of Long Island. Binns et al. (2002) surveyed the area, locating two distinct seamounts as well as a caldera SW of the reef; they found no evidence for the existence of the legendary Yomba volcano.

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