Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Hachijojima
Conical Nishi-yama volcano, seen here from the older cone Higashi-yama, forms the NW part of elongated Hachijo-jima island. The island's airport and its largest town occupy the flanks of Nishi-yama. The small volcanic island of Ko-jima (upper left) lies several km to the west of Hachijo-jima. The latest major activity of Nishi-yama, from the early Holocene until about 4000 years ago, was restricted to flank eruptions. Photo by Ichio Moriya (Kanazawa University).
Volcano Number:284050
Volcano Name:Hachijojima
Country:Japan
Volcano Type:Stratovolcano(es)
Last Eruption:1606 CE
Elevation:854m
Tectonic Setting:Subduction zone / Oceanic crust (< 15 km)
Pop. within 5km:11275
Pop. within 10km:13560
Pop. within 30km:13564
Pop. within 100km:14082
Latitude:33.137
Longitude:139.766


Eruption Data from the Global Volcanism Program of the Smithsonian Institution
Volcano Number Volcano Name Eruption Number Activity Type Explosivity Index Max Explosivity Index Modifier Activity Area Activity Unit Start Evidence Method Start Date End Date
284050 Hachijojima 18283 Confirmed Eruption 4 Nishi-yama Tephrochronology -8020
284050 Hachijojima 18284 Confirmed Eruption Nishi-yama Tephrochronology -7650
284050 Hachijojima 18285 Confirmed Eruption 3 Higashi-yama south flank Tephrochronology -5020
284050 Hachijojima 18286 Confirmed Eruption 5 Nishi-yama Tephrochronology -4650
284050 Hachijojima 18287 Confirmed Eruption Nishi-yama Tephrochronology -3350
284050 Hachijojima 18288 Confirmed Eruption 3 Between Nishi-yama & Higashi-yama Radiocarbon (corrected) -2700
284050 Hachijojima 18289 Confirmed Eruption 3 S flank of Higashi-yama (Myohoji) Tephrochronology -2550
284050 Hachijojima 18290 Confirmed Eruption 4 Nishi-yama Tephrochronology -2450
284050 Hachijojima 18291 Confirmed Eruption 5 SE of Nishi-yama, NE of Higashi-yama Tephrochronology -2050
284050 Hachijojima 18292 Confirmed Eruption Nishi-yama Tephrochronology -1250
284050 Hachijojima 18293 Confirmed Eruption SE flank of Nishi-yama (Kanda-yama) Tephrochronology -1150
284050 Hachijojima 18294 Confirmed Eruption 3 NW flank of Higashi-yama Tephrochronology -350
284050 Hachijojima 18295 Confirmed Eruption Nishi-yama Radiocarbon (corrected) -150
284050 Hachijojima 18296 Confirmed Eruption Nishi-yama summit and SE flank Radiocarbon (corrected) 850
284050 Hachijojima 18297 Confirmed Eruption 2 Nishi-yama Historical Observations 1487/12/7
284050 Hachijojima 18298 Confirmed Eruption 2 Nishi-yama Historical Observations 1518 1523
284050 Hachijojima 18299 Confirmed Eruption 2 Nishi-yama SE flank Historical Observations 1605/10/27
284050 Hachijojima 18300 Confirmed Eruption 2 Submarine flank Historical Observations 1606/1/23
284050 Hachijojima 18301 Uncertain Eruption 2 1707
Emissions Data from the Global Volcanism Program of the Smithsonian Institution
Sorry. No emissions data found for this volcano.

Data from the Earthchem Library
Sorry. No data exist for this volcano in the EarthChem Library.
Data from the Earthchem Portal
Sorry. No data exist for this volcano in the EarthChem Portal.

Data from the SESAR Database

Data from the MaGa Database
Location: Sueyoshi Hot Spring Well (View Details at MaGa DB)
Description: unknown
Hazard Description: unknown
Type: well
Region: Tokyo, Japan
Country: Japan
Volcanic Complex: Hachijojima
Gas Concentration Data:
Measurement Name Detail Date Specie Concentration Unit of Measure
Sue-1 Detail 2005/08/02 CO2 787.87 micromol/mol
Sue-1 Detail 2005/08/02 S (total) 144.55 micromol/mol
Sue-1 Detail 2005/08/02 H2S 144.55 micromol/mol
Sue-1 Detail 2005/08/02 NH3 0.83 micromol/mol
Sue-1 Detail 2005/08/02 Ar 0.713 micromol/mol
Sue-1 Detail 2005/08/02 N2 65.985 micromol/mol
Sue-1 Detail 2005/08/02 He 0 micromol/mol
Sue-1 Detail 2005/08/02 H2 0.014 micromol/mol
Sue-1 Detail 2005/08/02 O2 0 micromol/mol
Sue-1 Detail 2005/08/02 CH4 0.012 micromol/mol
Sue-1 Detail 2005/08/02 CO 0 micromol/mol
Gas Isotope Data:
Measurement Name Detail Date Isotope Abundance Unit of Measure
Sue-1 Detail 2005/08/02 d15N -0.1 permill_vs_smow
Gas Temperature Data:
Measurement Name Detail Date Temperature Unit of Measure
Sue-1 Detail 2005/08/02 43.9 °C
Location: Kashidate Hot Spring Well (View Details at MaGa DB)
Description: unknown
Hazard Description: unknown
Type: well
Region: Tokyo, Japan
Country: Japan
Volcanic Complex: Hachijojima
Gas Concentration Data:
Measurement Name Detail Date Specie Concentration Unit of Measure
Kas-1 Detail 2005/08/02 CO2 926.15 micromol/mol
Kas-1 Detail 2005/08/02 S (total) 61.06 micromol/mol
Kas-1 Detail 2005/08/02 H2S 61.06 micromol/mol
Kas-1 Detail 2005/08/02 NH3 0.081 micromol/mol
Kas-1 Detail 2005/08/02 Ar 0.29 micromol/mol
Kas-1 Detail 2005/08/02 N2 12.243 micromol/mol
Kas-1 Detail 2005/08/02 He 0 micromol/mol
Kas-1 Detail 2005/08/02 H2 0.004 micromol/mol
Kas-1 Detail 2005/08/02 O2 0.168 micromol/mol
Kas-1 Detail 2005/08/02 CH4 0.007 micromol/mol
Kas-1 Detail 2005/08/02 CO 0 micromol/mol
Gas Isotope Data:
Measurement Name Detail Date Isotope Abundance Unit of Measure
Kas-1 Detail 2005/08/02 d15N 0.1 permill_vs_smow
Gas Temperature Data:
Measurement Name Detail Date Temperature Unit of Measure
Kas-1 Detail 2005/08/02 44.6 °C
Location: Ogoshi Hot Spring Well (View Details at MaGa DB)
Description: unknown
Hazard Description: unknown
Type: well
Region: Tokyo, Japan
Country: Japan
Volcanic Complex: Hachijojima
Gas Concentration Data:
Measurement Name Detail Date Specie Concentration Unit of Measure
Ogo-1 Detail 2005/08/02 CO2 918.3 micromol/mol
Ogo-1 Detail 2005/08/02 S (total) 47.5 micromol/mol
Ogo-1 Detail 2005/08/02 H2S 47.5 micromol/mol
Ogo-1 Detail 2005/08/02 HF 1.365 micromol/mol
Ogo-1 Detail 2005/08/02 NH3 0.576 micromol/mol
Ogo-1 Detail 2005/08/02 Ar 0.692 micromol/mol
Ogo-1 Detail 2005/08/02 N2 29.041 micromol/mol
Ogo-1 Detail 2005/08/02 He 0 micromol/mol
Ogo-1 Detail 2005/08/02 H2 0.044 micromol/mol
Ogo-1 Detail 2005/08/02 O2 2.407 micromol/mol
Ogo-1 Detail 2005/08/02 CH4 0.069 micromol/mol
Ogo-1 Detail 2005/08/02 CO 0 micromol/mol
Gas Isotope Data:
Measurement Name Detail Date Isotope Abundance Unit of Measure
Ogo-1 Detail 2005/08/02 d15N 1.9 permill_vs_smow
Gas Temperature Data:
Measurement Name Detail Date Temperature Unit of Measure
Ogo-1 Detail 2005/08/02 53.3 °C
Location: Yasuragi Hot Spring Well (View Details at MaGa DB)
Description: unknown
Hazard Description: unknown
Type: well
Region: Tokyo, Japan
Country: Japan
Volcanic Complex: Hachijojima
Gas Concentration Data:
Measurement Name Detail Date Specie Concentration Unit of Measure
Yas-1 Detail 2005/08/02 CO2 854.43 micromol/mol
Yas-1 Detail 2005/08/02 S (total) 118.3 micromol/mol
Yas-1 Detail 2005/08/02 SO2 113.23 micromol/mol
Yas-1 Detail 2005/08/02 H2S 4.94 micromol/mol
Yas-1 Detail 2005/08/02 HF 4.418 micromol/mol
Yas-1 Detail 2005/08/02 NH3 0.783 micromol/mol
Yas-1 Detail 2005/08/02 Ar 0.51 micromol/mol
Yas-1 Detail 2005/08/02 N2 20.79 micromol/mol
Yas-1 Detail 2005/08/02 He 0.00729 micromol/mol
Yas-1 Detail 2005/08/02 H2 0.008 micromol/mol
Yas-1 Detail 2005/08/02 O2 0.709 micromol/mol
Yas-1 Detail 2005/08/02 CH4 0.04 micromol/mol
Yas-1 Detail 2005/08/02 CO 0 micromol/mol
Gas Isotope Data:
Measurement Name Detail Date Isotope Abundance Unit of Measure
Yas-1 Detail 2005/08/02 d15N 0.3 permill_vs_smow
Gas Temperature Data:
Measurement Name Detail Date Temperature Unit of Measure
Yas-1 Detail 2005/08/02 54.4 °C
Location: Geothermal Power Plant, Hachijojima (View Details at MaGa DB)
Description: unknown
Hazard Description: unknown
Type: well
Region: Tokyo, Japan
Country: Japan
Volcanic Complex: Hachijojima
Gas Concentration Data:
Measurement Name Detail Date Specie Concentration Unit of Measure
Geo-1 Detail 2005/08/03 H2O 990.76 micromol/mol
Geo-1 Detail 2005/08/03 CO2 864.94 micromol/mol
Geo-1 Detail 2005/08/03 S (total) 121.56 micromol/mol
Geo-1 Detail 2005/08/03 SO2 42.69 micromol/mol
Geo-1 Detail 2005/08/03 H2S 78.51 micromol/mol
Geo-1 Detail 2005/08/03 HCl 1.363 micromol/mol
Geo-1 Detail 2005/08/03 HF 0.356 micromol/mol
Geo-1 Detail 2005/08/03 NH3 0.051 micromol/mol
Geo-1 Detail 2005/08/03 Ar 0.005 micromol/mol
Geo-1 Detail 2005/08/03 N2 1.311 micromol/mol
Geo-1 Detail 2005/08/03 He 0.00108 micromol/mol
Geo-1 Detail 2005/08/03 H2 10.389 micromol/mol
Geo-1 Detail 2005/08/03 O2 0 micromol/mol
Geo-1 Detail 2005/08/03 CH4 0.022 micromol/mol
Geo-1 Detail 2005/08/03 CO 0 micromol/mol
Geo-2 Detail 2005/08/03 H2O 990.68 micromol/mol
Geo-2 Detail 2005/08/03 CO2 820.18 micromol/mol
Geo-2 Detail 2005/08/03 S (total) 107.56 micromol/mol
Geo-2 Detail 2005/08/03 SO2 63.46 micromol/mol
Geo-2 Detail 2005/08/03 H2S 43.86 micromol/mol
Geo-2 Detail 2005/08/03 HCl 2.292 micromol/mol
Geo-2 Detail 2005/08/03 HF 0.254 micromol/mol
Geo-2 Detail 2005/08/03 NH3 1.438 micromol/mol
Geo-2 Detail 2005/08/03 Ar 0.263 micromol/mol
Geo-2 Detail 2005/08/03 N2 46.598 micromol/mol
Geo-2 Detail 2005/08/03 He 0 micromol/mol
Geo-2 Detail 2005/08/03 H2 21.318 micromol/mol
Geo-2 Detail 2005/08/03 O2 0.048 micromol/mol
Geo-2 Detail 2005/08/03 CH4 0.043 micromol/mol
Geo-2 Detail 2005/08/03 CO 0.00354 micromol/mol
Gas Isotope Data:
Measurement Name Detail Date Isotope Abundance Unit of Measure
Geo-1 Detail 2005/08/03 d15N 4.8 permill_vs_smow
Geo-2 Detail 2005/08/03 d15N 3 permill_vs_smow
Gas Temperature Data:
Measurement Name Detail Date Temperature Unit of Measure
Geo-1 Detail 2005/08/03 170.8 °C
Geo-2 Detail 2005/08/03 170.8 °C