Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Hunga Tonga-Hunga Ha'apai
The small islands of Hunga Tonga (upper right) and Hunga Ha'apai (left) are the peaks a large seamount located about 30 km SSE of Falcon Island. The two islands are about 2 km long. They have inward-facing cliffs that represent the W and N remnants of the rim of a largely-submarine caldera lying E and S of the islands. A shoal is visible 3.2 km SE of Hunga Ha'apai and 3 km south of Hunga Tonga and marks the most prominent historically active vent. Aerial photo by Tonga Ministry of Lands, Survey, and Natural Resources, 1991 (published in Taylor and Ewart, 1997).
Volcano Number: 243040
Volcano Name: Hunga Tonga-Hunga Ha'apai
Country: Tonga
Volcano Type: Caldera
Last Eruption: 2022 CE
Elevation: 114m
Tectonic Setting: Subduction zone / Oceanic crust (< 15 km)
Pop. within 5km: 230
Pop. within 10km: 230
Pop. within 30km: 532
Pop. within 100km: 86213
Latitude: -20.5532
Longitude: -175.3841



Eruption Data from the Global Volcanism Program of the Smithsonian Institution
Emissions Data from the Global Volcanism Program of the Smithsonian Institution


Data from the Earthchem Library
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Data from the Earthchem Portal
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Data from the SESAR Database
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Data from the MaGa Database
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Data from UNAVCO
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Data from USIEI
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Data from IRIS FDSNWS