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Kasuga 1 volcano

Updated: Mar 31, 2023 10:01 GMT -
Submarine -598 m / -1962 ft
Marianas Islands, United States, 21.77°N / 143.71°E
Current status: (probably) extinct (0 out of 5)
Kasuga 1 is the northernmost of three seamounts in the Kasuga seamount chain. It rises to within about 600 m of the sea surface. Pumice from a submarine eruption was witnessed in 1959. (Image: NOAA, 2003,
Kasuga 1 is the northernmost of three seamounts in the Kasuga seamount chain. It rises to within about 600 m of the sea surface. Pumice from a submarine eruption was witnessed in 1959. (Image: NOAA, 2003,

The Kasuga 1 seamount is a conical volcano that rises to within 598 m of the sea surface SE of Fukujin submarine volcano. It was listed as an active volcano by the Japan Meteorological Agency, and floating pumice attributed to a submarine eruption was seen south of the volcano in the summer of 1959.

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Typical eruption style: unspecified
Kasuga 1 volcano eruptions: 1959

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Water discoloration from a possible submarine eruption was reported near the seamount in November 1975. Kasuga, the northernmost of three seamounts in the the Kasuga seamount chain, rises from a depth of 3000 m. A series of flank vents are located low on the southern side of the edifice. The summit does not have a caldera or display hydrothermal activity, and the volcano is largely mantled by volcaniclastics. Altered basaltic and andesitic rocks dredged from the summit suggest that it is the oldest of the three seamounts, although delicately preserved lava flow lobes and toes from a flank eruption suggest a very youthful age.

See also: Sentinel hub | Landsat 8 | NASA FIRMS
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