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Minami-Hiyoshi Seamount

Minami-Hiyoshi

Stratovulcano · Japan · 107 m (sottomarino)

Minami-Hiyoshi (center) is seen in this Japan Coast Guard bathymetric image with N to the right. Periodic water discoloration and water-spouting have been reported over this submarine volcano since 1975 along with audible detonations and an explosion. Minami-Hiyoshi lies near the SE end of a coalescing chain of seamounts. Naka-Hiyoshi (upper right) lies to the NW and Ko-Hiyoshi seamount (left) to the SSE.
Minami-Hiyoshi (center) is seen in this Japan Coast Guard bathymetric image with N to the right. Periodic water discoloration and water-spouting have been reported over this submarine volcano since 1975 along with audible detonations and an explosion. Minami-Hiyoshi lies near the SE end of a coalescing chain of seamounts. Naka-Hiyoshi (upper right) lies to the NW and Ko-Hiyoshi seamount (left) to the SSE. · Foto: Image courtesy of HOD Japan Coast Guard (http://www1.kaiho.mlit.go.jp/jhd-E). · Wikimedia Commons
Tipo
Stratovulcano
Paese
Japan
Regione
Northwestern Pacific Volcanic Regions / Mariana Volcanic Arc
Altitudine
107 m (sottomarino)
Coordinate
23.500, 141.935
Ultima eruzione
1975
Contesto tettonico
Subduction zone / Crustal thickness unknown
Forma vulcanica
Composite
Roccia principale
Trachyandesite / Basaltic Trachyandesite
Sintesi geologica

Periodic water discoloration and water-spouting have been reported over the Minami-Hiyoshi submarine volcano since 1975, when detonation sounds and an explosion were also reported. It lies near the SE end of a coalescing chain of youthful seamounts, and is the only vent with recorded activity. The reported depth of the summit of the trachyandesitic volcano has varied between 274 and 30 m. The morphologically youthful seamounts Kita-Hiyoshi and Naka-Hiyoshi lie to the NW, and Ko-Hiyoshi to the SE.

Sintesi da Wikipedia

Riassunto in inglese

The Minami-Hiyoshi Seamount is an active seamount in the Bonin Islands of Japan.

Wikipedia · CC BY-SA · Leggi l'articolo completo →

Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
1975~1977 · 3 eruzioni · VEI max. 01977~1979 · 1 eruzioni · VEI max. 01992~1994 · 1 eruzioni · VEI max. 01994~1996 · 1 eruzioni · VEI max. 019751979198619901994

Cronologia dettagliata

  1. 1996VEI 0Stima geologica
    1996-01-11 – 1996-01-12
  2. 1992VEI 0Stima geologica
    1992-02-12 – 1992-03-04
  3. 1978VEI 0Stima geologica
    1978-01-26 – 1978-03-24
  4. 1976VEI 0Stima geologica
    1976-02-16 – In corso
  5. 1976VEI 0Stima geologica
    1976-12-20 – 1977-03-28
    Hiyoshi-Okinoba (also 23.48 N 141.67 E)
  6. 1975VEI 0Osservata
    1975-08-25 – In corso
    23.50 N 141.92 E

Link esterni

⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.