Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 38.729°N
  • 140.734°E

  • 470 m
    1542 ft

  • 283200
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Naruko.

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

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

Eruptive History

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
0837 May 27 Unknown Confirmed 1 Historical Observations
0800 BCE (in or before) Unknown Confirmed   Radiocarbon (corrected)
1350 BCE ± 50 years Unknown Confirmed   Radiocarbon (corrected)
1400 BCE (in or before) Unknown Confirmed   Tephrochronology
4400 BCE (after) Unknown Confirmed   Radiocarbon (corrected)

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

Katanuma lake in Narugo caldera is seen from its NW shore with Oga-dake lava dome forming the peak in the distance on the right-center horizon. Oga-dake, the highest of a cluster of lava domes surrounding the lake, is only 470 m above sea level. Katanuma is one of the most acidic crater lakes in Japan, with a pH of 1.6, and sulfur is mined from sediments on the lake floor. Narugo (also known as Naruko) is a poorly defined, 5.5 x 7 km caldera NW of the city of Sendai; its only known historical eruption took place in 837 CE.

Copyrighted photo by Jun'ichi Itoh (Japanese Quaternary Volcanoes database, RIODB, and Geol Surv Japan, AIST,
See title for photo information.

Smithsonian Sample Collections Database

The following 2 samples associated with this volcano can be found in the Smithsonian's NMNH Department of Mineral Sciences collections. Catalog number links will open a window with more information.

Catalog Number Sample Description
NMNH 108980-22 Dacite
NMNH 117455-49 Obsidian

Affiliated Sites