Nasudake

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 37.125°N
  • 139.963°E

  • 1915 m
    6281 ft

  • 283150
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Bulletin Report: July 1996 (BGVN 21:07) Citation IconCite this Report


Seismic activity increases

High seismicity was recorded on 14 July with a total of 14 earthquakes. The Nasu volcano group consists of a N-S cluster of stratovolcanoes and lava domes at the N end of the Kanto plain. Nasu volcanics date back at least 350,000 years. The youngest dome, Chausu-dake, is late Holocene in age and has had several severe explosive eruptions since its first historical eruption in the late 14th century.

Information Contacts: Volcanological Division, Japan Meteorological Agency, 1-3-4 Ote-machi, Chiyoda-ku, Tokyo 100, Japan

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

Bulletin Reports - Index


Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.

03/1977 (NSEB 02:03) Earthquake swarm with felt events

10/1985 (SEAN 10:10) Two earthquake swarms

07/1996 (BGVN 21:07) Seismic activity increases




Information is preliminary and subject to change. All times are local (unless otherwise noted)


March 1977 (NSEB 02:03) Citation IconCite this Report


Earthquake swarm with felt events

An earthquake swarm including felt shocks occurred on 30-31 January, but no surface phenomena were observed.

Information Contacts: JMA, Tokyo.


October 1985 (SEAN 10:10) Citation IconCite this Report


Two earthquake swarms

Local seismic activity increased 9-12 September at the N foot, about 10 km from the summit. Magnitude [3.5] events recorded on 9 and 11 September were felt at intensity I and II at a town 7 km NW of the summit, but were not felt at the JMA Nasudake Volcano Observatory, about 19 km to the SSE.

Another swarm of small earthquakes occurred [27-29 September] at the NE foot, about 10 km from the summit. Three larger events were felt at Kashi hot spring, 7 km NE of the summit, but again none were felt at the JMA Observatory. The JMA seismic network in this area could not accurately determine hypocenters and magnitudes of small events. The largest events of this swarm were estimated to be roughly magnitude 2.7. Earthquake swarms are common around Nasu.

Information Contacts: JMA, Tokyo.


July 1996 (BGVN 21:07) Citation IconCite this Report


Seismic activity increases

High seismicity was recorded on 14 July with a total of 14 earthquakes. The Nasu volcano group consists of a N-S cluster of stratovolcanoes and lava domes at the N end of the Kanto plain. Nasu volcanics date back at least 350,000 years. The youngest dome, Chausu-dake, is late Holocene in age and has had several severe explosive eruptions since its first historical eruption in the late 14th century.

Information Contacts: Volcanological Division, Japan Meteorological Agency, 1-3-4 Ote-machi, Chiyoda-ku, Tokyo 100, Japan

Eruptive History


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


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1963 Nov 20 1963 Nov 21 Confirmed 1 Historical Observations Chausu-dake (west side)
[ 1963 Jul 10 ] [ 1963 Jul 11 ] Uncertain 1   Chausu-dake
1960 Oct 10 (?) Unknown Confirmed 1 Historical Observations Chausu-dake (50 m north of 1953 vent)
1953 Oct 24 1953 Oct 29 Confirmed 1 Historical Observations Chausu-dake (1881 crater)
1881 Jul 1 Unknown Confirmed 1 Historical Observations Chausu-dake (west and NW side of summit)
1846 Aug Unknown Confirmed 1 Historical Observations Chausu-dake
1410 Mar 5 Unknown Confirmed 3 Historical Observations Chausu-dake
1408 Feb 24 Unknown Confirmed 3 Historical Observations Chausu-dake, CH6 tephra
1404 Feb 11 Unknown Confirmed 3 Historical Observations Chausu-dake
1397 Feb 17 Unknown Confirmed 3 Historical Observations Chausu-dake
0330 ± 200 years Unknown Confirmed 2 Radiocarbon (corrected) Chausu-dake, Ns-7 to 5 tephras
0250 ± 200 years Unknown Confirmed 3 Radiocarbon (corrected) Chausu-dake, Ns-8 tephra
0250 BCE (?) Unknown Confirmed 2 Tephrochronology Chausu-dake, Ns-12 to 9 tephras
0700 BCE ± 200 years Unknown Confirmed 3 Radiocarbon (corrected) Chausu-dake, CH5 tephra
1440 BCE ± 500 years Unknown Confirmed 2 Tephrochronology Chausu-dake
2000 BCE ± 1450 years Unknown Confirmed 2 Tephrochronology Chausu-dake
4350 BCE ± 950 years Unknown Confirmed 2 Tephrochronology Chausu-dake
5550 BCE ± 500 years Unknown Confirmed 3 Radiocarbon (corrected) Chausu-dake, CH4 tephra
6050 BCE (?) Unknown Confirmed 2 Tephrochronology Chausu-dake
7850 BCE (?) Unknown Confirmed 3 Radiocarbon (corrected) Chausu-dake, CH3 tephra
8550 BCE ± 1500 years Unknown Confirmed 2 Tephrochronology Chausu-dake

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


A line of hikers at the lower left navigate a trail below the steaming summit of Chausu-dake, the active cone of the Nasu volcanic complex. The Nasu volcano group consists of a N-S-trending cluster of stratovolcanoes and lava domes at the north end of the Kanto Plain. The youngest volcano, Chausu-dake, began forming about 16,000 years ago. The last of six magmatic eruptions took place in 1408-1410 CE, when the youngest summit lava dome was formed. More frequent smaller phreatic eruptions have occurred during historical time.

Photo by Yukio Hayakawa, 1994 (Gunma University).
See title for photo information.

Smithsonian Sample Collections Database


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

Affiliated Sites