Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 39.95°N
  • 139.73°E

  • 291 m
    954 ft

  • 283262
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Megata.

The Global Volcanism Program has no Weekly Reports available for Megata.

The Global Volcanism Program has no Bulletin Reports available for Megata.

Eruptive History

Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
2050 BCE (?) Unknown Confirmed   Tephrochronology
7050 BCE (?) Unknown Confirmed   Tephrochronology

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.

Photo Gallery

An aerial view from the NW with Toga Bay in the foreground shows Sannomegata (center), one of a group of the three small Megata maars along the tip of the Oga Peninsula. The names of the three maars, Ichinomegata, Ninomegata, and Sannomegata mean First, Second, and Third Megata, respectively. Lakes 300-700 m wide fill the maars, which are noted localities for mantle-derived xenoliths and are located immediately east and south of Toga Bay.

Copyrighted photo by Hiroshi Yagi (Japanese Quaternary Volcanoes database, RIODB, and Geol Surv Japan, AIST,
See title for photo information.

Smithsonian Sample Collections Database

There are no samples for Megata in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites