Hachijo-jima volcano

Updated: Jul 6, 2022 09:32 GMT - Refresh
stratovolcanoes 854 m / 2,802 ft
Izu Islands (Japan), 33.13°N / 139.77°E
Current status: normal or dormant (1 out of 5)
Last update: 9 Dec 2021

Hachijo-jima volcano (八丈島, Hachijōjima) forms an 14 km NW-SE elongated island in the central Izu Islands about 300 km south of Tokyo. It consists of 2 small overlapping, mainly basaltic stratovolcanoes (Higashi-yama and Nishi-yama).
The last eruptions were from the younger Nishi-yama volcano in the 15th century and occurred from the summit and submarine vents.

Show interactive Map
[hide map] [enlarge]
Typical eruption style: explosive
Hachijo-jima volcano eruptions: 1707 (?), 1606, 1605, 1518-23, 1487
Lastest nearby earthquakes: No recent earthquakes

Background

The older of the 2 volcanoes is the eroded Pleistocene-to-Holocene Higashi-yama volcano on the SE end of the 14-km-long island.
The younger and historically active is the symmetrical Nishi-yama volcano the NW end. Flank cones occur on the SE flank of Nishi-yama. The small volcanic island of Ko-jima lies several km to the west of Hachijo-jima and probably represents a flank vent or an older predecessor volcano of Nishi-yama.
Higashi-yama began erupting several tens of thousands of years ago and formed 2 small calderas. Nishi-yama volcano started to grow from below sea level about 10,000-8,000 years ago.
(Source: Smithsonian / GVP volcano information)

2009 earthquake
A magnitude 6.6 earthquake hit 60 km SE of Hachijo-jima volcano on 13 August 2009.

2002 earthquake swarm
An earthquake swarm began at Hachijojima volcano on 13 August 2002 and lasted until around 21 August. On 15 August earthquakes occurred 2 km off the western shore at depths of 5-15 km.

See also: Sentinel hub | Landsat 8 | NASA FIRMS
Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version

More on VolcanoDiscovery

Why is there advertising on this site?
Support us - Help us upgrade our services!
We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Detailed quake stats
  • Additional seismic data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.
Use of material: Most text and images on our websites are owned by us. Re-use is generally not permitted without authorization. Contact us for licensing rights.
Volcanoes & Earthquakes
VolcanoDiscovery Home
Adventure & Study Travel
Tours to Volcanoes and Volcanic Areas: walking tours, photo tours, study tours Get our newsletter!
Company info
Contact | Legal info | Terms & conditions
Follow us
Follow us on facebook Follow us on Instagram Follow us on Twitter Visit our Youtube channel
EN | DE | EL | ES | FR | IT | RU
VolcanoDiscovery GmbH, Germany, Reg. nr.: HRB 103744, EU Tax Id: DE 310 395 322 owned and created by
Dr. Tom Pfeiffer, volcanologist, volcano photographer, tour organizer member of
IAVCEI
Volcanological Society
Ecotourism Greece
Insured by R+V
VolcanoDiscovery © 2004- All Rights Reserved | Privacy - cookie settings