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Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Izu-Oshima
A steam plume rises from the crater of Mihara-yama on Oshima island. Mihara-yama lies within a 4-km-wide caldera, whose rim is prominently visible in this aerial photo from the SW. Dark-colored lava flows from the 1986 eruption cover part of the caldera floor north of Mihara-yama. More than 40 parasitic cones are located within the caldera and along two parallel rift zones trending NNW-SSE across the island. The port city of Motomachi on the west coast is at the left and the island's airport is at the upper left. Photo by Ichio Moriya (Kanazawa University).
Volcano Number:
284010
Volcano Name:
Izu-Oshima
Country:
Japan
Volcano Type:
Stratovolcano
Last Eruption:
1990 CE
Elevation:
758m
Tectonic Setting:
Subduction zone / Oceanic crust (< 15 km)
Pop. within 5km:
2381
Pop. within 10km:
8037
Pop. within 30km:
8375
Pop. within 100km:
11837468
Latitude:
34.724
Longitude:
139.394
Details
Download XLS
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
284010
Izu-Oshima
18037
Confirmed Eruption
1
Mihara-yama
Historical Observations
1965/11/25
1966/6/13
284010
Izu-Oshima
18138
Confirmed Eruption
Tephra layer O47
Tephrochronology
-8450
284010
Izu-Oshima
18139
Confirmed Eruption
Tephra layers O46, O45
Tephrochronology
-8050
284010
Izu-Oshima
18140
Confirmed Eruption
Tephra layer O44
Tephrochronology
-7650
284010
Izu-Oshima
18141
Confirmed Eruption
Tephra layers O43, O42
Tephrochronology
-7150
284010
Izu-Oshima
18142
Confirmed Eruption
Tephra layer O41
Tephrochronology
-6650
284010
Izu-Oshima
18143
Confirmed Eruption
Tephra layer O40
Tephrochronology
-6550
284010
Izu-Oshima
18144
Confirmed Eruption
Tephra layers Osb39-2 to Osb38-1
Tephrochronology
-6050
284010
Izu-Oshima
18145
Confirmed Eruption
Tephra layer Osb37-5
Tephrochronology
-5550
284010
Izu-Oshima
18146
Confirmed Eruption
Tephra layers Osb37-4, Osb37-3
Tephrochronology
-5450
284010
Izu-Oshima
18147
Confirmed Eruption
Tephra layers Osb37-2, Osb36-1
Tephrochronology
-4920
284010
Izu-Oshima
18148
Confirmed Eruption
Tephra layer O35
Tephrochronology
-4450
284010
Izu-Oshima
18149
Confirmed Eruption
Tephra layer O34
Tephrochronology
-4250
284010
Izu-Oshima
18150
Confirmed Eruption
Tephra layers O32-2, O32-1, and O32
Tephrochronology
-4000
284010
Izu-Oshima
18151
Confirmed Eruption
Tephra layer O31
Tephrochronology
-3750
284010
Izu-Oshima
18152
Confirmed Eruption
Tephra layer O30
Tephrochronology
-3650
284010
Izu-Oshima
18153
Confirmed Eruption
Tephra layers O29 to O16
Tephrochronology
-2550
284010
Izu-Oshima
18154
Confirmed Eruption
Tephra layer O15
Tephrochronology
-1450
284010
Izu-Oshima
18155
Confirmed Eruption
Tephra layer O14
Tephrochronology
-1200
284010
Izu-Oshima
18156
Confirmed Eruption
Tephra layers O13 to O11
Tephrochronology
-1050
284010
Izu-Oshima
18157
Confirmed Eruption
2
SE flank
Tephra layer O10
Radiocarbon (corrected)
-900
284010
Izu-Oshima
18158
Confirmed Eruption
3
Tephra layers O9 to O5
Tephrochronology
-600
284010
Izu-Oshima
18159
Confirmed Eruption
3
Tephra layers O4, O3
Tephrochronology
-150
284010
Izu-Oshima
18160
Confirmed Eruption
3
Tephra layer O2
Radiocarbon (corrected)
150
284010
Izu-Oshima
18161
Confirmed Eruption
3
Tephra layer O1
Tephrochronology
250
284010
Izu-Oshima
18162
Confirmed Eruption
4
Summit and east flank
Tephra layer S2
Radiocarbon (corrected)
340
284010
Izu-Oshima
18163
Confirmed Eruption
3
Tephra layer S1.5
Varve Count
580
284010
Izu-Oshima
18164
Confirmed Eruption
3
Tephra layer S1
Varve Count
600
284010
Izu-Oshima
18165
Confirmed Eruption
3
Tephra layer N4.8
Varve Count
625
284010
Izu-Oshima
18166
Confirmed Eruption
3
Tephra layer N4.6?
Historical Observations
654
284010
Izu-Oshima
18167
Confirmed Eruption
4
Tephra layer N4.4?
Historical Observations
680
681/3/26
284010
Izu-Oshima
18168
Confirmed Eruption
Historical Observations
684/11/29
284010
Izu-Oshima
18169
Confirmed Eruption
3
Tephra layer N4.2
Varve Count
700
284010
Izu-Oshima
18170
Confirmed Eruption
3
Summit, N & S flanks
Tephra layer N4
Varve Count
713
284010
Izu-Oshima
18171
Confirmed Eruption
3
Tephra layer N3.2
Varve Count
822
284010
Izu-Oshima
18172
Confirmed Eruption
3
Summit, SE flank
Tephra layer N3.0
Historical Observations
838
284010
Izu-Oshima
18173
Confirmed Eruption
4
Tephra layer N2.0?
Historical Observations
854/9/14
856
284010
Izu-Oshima
18174
Confirmed Eruption
4
Tephra layer N1.0?
Historical Observations
886/6/29
284010
Izu-Oshima
18175
Uncertain Eruption
936
284010
Izu-Oshima
18176
Uncertain Eruption
1112/11/18
1112/12/26
284010
Izu-Oshima
18177
Confirmed Eruption
4
Tephra layer Y6
Varve Count
1183
284010
Izu-Oshima
18178
Confirmed Eruption
1
Tephra layer Y5.6
Varve Count
1245
284010
Izu-Oshima
18179
Confirmed Eruption
3
NW flank
Tephra layer Y5.2
Varve Count
1307
284010
Izu-Oshima
18180
Confirmed Eruption
3
Tephra layer 5
Historical Observations
1338/9/15
1338/11/15
284010
Izu-Oshima
18181
Confirmed Eruption
Historical Observations
1415/5/21
284010
Izu-Oshima
18182
Confirmed Eruption
2
Tephra layer 4.2
Historical Observations
1416/9/2
1417
284010
Izu-Oshima
18183
Confirmed Eruption
4
Summit, S flank
Tephra layer Y4
Historical Observations
1421/5/14
284010
Izu-Oshima
18184
Confirmed Eruption
Historical Observations
1442
1443
284010
Izu-Oshima
18185
Confirmed Eruption
2
Tephra layer Y3.8
Varve Count
1471
284010
Izu-Oshima
18186
Confirmed Eruption
3
Historical Observations
1552/10/7
1552/10/15
284010
Izu-Oshima
18187
Confirmed Eruption
Historical Observations
1600
284010
Izu-Oshima
18188
Confirmed Eruption
Historical Observations
1612/10/15
284010
Izu-Oshima
18189
Confirmed Eruption
Historical Observations
1623
284010
Izu-Oshima
18190
Confirmed Eruption
Historical Observations
1634
284010
Izu-Oshima
18191
Confirmed Eruption
Historical Observations
1637/8/26
1638
284010
Izu-Oshima
18192
Confirmed Eruption
3
Tephra layer Y2
Historical Observations
1684/2/14
1690
284010
Izu-Oshima
18193
Confirmed Eruption
Historical Observations
1695/4/12
284010
Izu-Oshima
18194
Confirmed Eruption
3
Mihara-yama & flanks
Tephra layer Y1
Historical Observations
1777/8/31
1779
284010
Izu-Oshima
18195
Confirmed Eruption
2
Mihara-yama
Historical Observations
1783
1786
284010
Izu-Oshima
18196
Confirmed Eruption
2
Mihara-yama
Historical Observations
1789
284010
Izu-Oshima
18197
Confirmed Eruption
2
Mihara-yama
Historical Observations
1792
284010
Izu-Oshima
18198
Confirmed Eruption
2
Mihara-yama
Historical Observations
1803/9/26
1803/11/14
284010
Izu-Oshima
18199
Confirmed Eruption
3
Yephra layer Y0.8
Varve Count
1821
284010
Izu-Oshima
18200
Confirmed Eruption
2
Mihara-yama
Historical Observations
1822
1824
284010
Izu-Oshima
18201
Uncertain Eruption
Mihara-yama
1827
284010
Izu-Oshima
18202
Uncertain Eruption
2
Mihara-yama
1837
1838
284010
Izu-Oshima
18203
Confirmed Eruption
2
Mihara-yama
Historical Observations
1846
284010
Izu-Oshima
18204
Uncertain Eruption
Mihara-yama
1868/12/31
284010
Izu-Oshima
18205
Confirmed Eruption
2
Mihara-yama
Historical Observations
1870
284010
Izu-Oshima
18206
Confirmed Eruption
2
Mihara-yama
Historical Observations
1876/12/27
1877/2/5
284010
Izu-Oshima
18207
Confirmed Eruption
1
Mihara-yama
Historical Observations
1910
284010
Izu-Oshima
18208
Confirmed Eruption
1
Mihara-yama
Historical Observations
1912/2/23
1913/1/25
284010
Izu-Oshima
18209
Confirmed Eruption
2
Mihara-yama
Historical Observations
1914/5/15
1914/5/26
284010
Izu-Oshima
18210
Confirmed Eruption
2
Mihara-yama
Historical Observations
1915/10/10
1915/10/25
284010
Izu-Oshima
18211
Confirmed Eruption
0
Mihara-yama
Historical Observations
1919/5/18
1919/12/23
284010
Izu-Oshima
18212
Uncertain Eruption
Mihara-yama
1920
284010
Izu-Oshima
18213
Confirmed Eruption
1
Mihara-yama
Historical Observations
1922/12/8
1923/1/30
284010
Izu-Oshima
18214
Confirmed Eruption
2
Mihara-yama
Historical Observations
1928/8/7
1928/8/8
284010
Izu-Oshima
18215
Confirmed Eruption
0
Mihara-yama
Historical Observations
1933/10/14
1933
284010
Izu-Oshima
18216
Confirmed Eruption
0
Mihara-yama
Historical Observations
1934/4/15
1934/4/25
284010
Izu-Oshima
18217
Uncertain Eruption
Mihara-yama
1934
284010
Izu-Oshima
18218
Confirmed Eruption
0
Mihara-yama
Historical Observations
1935/4/26
1935/5/6
284010
Izu-Oshima
18219
Confirmed Eruption
0
Mihara-yama
Historical Observations
1937/7/17
1937
284010
Izu-Oshima
18220
Confirmed Eruption
1
Mihara-yama
Historical Observations
1938/8/11
1938/8/11
284010
Izu-Oshima
18221
Confirmed Eruption
1
?
Mihara-yama
Historical Observations
1939
1939
284010
Izu-Oshima
18222
Confirmed Eruption
1
Mihara-yama
Historical Observations
1939/9/1
1939/9/16
284010
Izu-Oshima
18223
Confirmed Eruption
1
Mihara-yama
Historical Observations
1940/8/18
1940/8/19
284010
Izu-Oshima
18224
Confirmed Eruption
2
Mihara-yama, south rim
Historical Observations
1950/7/16
1951/6/28
284010
Izu-Oshima
18225
Confirmed Eruption
1
Mihara-yama
Historical Observations
1953/10/5
1954/2/8
284010
Izu-Oshima
18226
Confirmed Eruption
1
Mihara-yama
Historical Observations
1956/1/3
1956/1/6
284010
Izu-Oshima
18227
Uncertain Eruption
1
?
Mihara-yama
1956/8/25
1956/8/26
284010
Izu-Oshima
18228
Confirmed Eruption
1
Mihara-yama
Historical Observations
1957/8/16
1957/12/16
284010
Izu-Oshima
18229
Confirmed Eruption
1
Mihara-yama
Historical Observations
1958/4/17
1958/6/13
284010
Izu-Oshima
18230
Confirmed Eruption
1
Mihara-yama
Historical Observations
1959/1/16
1959/1/16
284010
Izu-Oshima
18231
Confirmed Eruption
1
Mihara-yama
Historical Observations
1959/10/16
1960/11/16
284010
Izu-Oshima
18232
Uncertain Eruption
Mihara-yama
1961/7/2
284010
Izu-Oshima
18233
Confirmed Eruption
1
Mihara-yama
Historical Observations
1962/1/16
1965/5/16
284010
Izu-Oshima
18234
Confirmed Eruption
1
Mihara-yama
Historical Observations
1967/5/16
1967/8/16
284010
Izu-Oshima
18235
Confirmed Eruption
1
Mihara-yama
Historical Observations
1968/1/19
1968/1/19
284010
Izu-Oshima
18236
Confirmed Eruption
1
Mihara-yama
Historical Observations
1968/7/28
1968/7/28
284010
Izu-Oshima
18237
Confirmed Eruption
1
Mihara-yama
Historical Observations
1969/1/19
1969/7/16
284010
Izu-Oshima
18238
Confirmed Eruption
1
Mihara-yama
Historical Observations
1970/1/26
1970/1/31
284010
Izu-Oshima
18239
Confirmed Eruption
1
Mihara-yama
Historical Observations
1970/6/30
1970/11/12
284010
Izu-Oshima
18240
Confirmed Eruption
1
Mihara-yama
Historical Observations
1971/4/5
1971/4/5
284010
Izu-Oshima
18241
Confirmed Eruption
1
Mihara-yama
Historical Observations
1974/2/28
1974/6/20
284010
Izu-Oshima
18242
Confirmed Eruption
3
Mihara-yama, N part and NW of caldera
Historical Observations
1986/11/15
1986/12/18
284010
Izu-Oshima
18243
Confirmed Eruption
2
Mihara-yama
Historical Observations
1987/11/16
1988/1/27
284010
Izu-Oshima
18244
Confirmed Eruption
2
Mihara-yama (1987 summit crater)
Historical Observations
1990/10/4
1990/10/4
Emissions Data from the Global Volcanism Program of the Smithsonian Institution
Emission ID
SO2 Kilotons
Start Date
End Date
170
22
1986/11/19
1986/11/19
Abstract
X
blah blah blah
Data from the Earthchem Library
Sorry. No data exist for this volcano in the EarthChem Library.
Data from the Earthchem Portal
Show 445 Results
Hide Results
Sample ID
LINK
Source
DB
Method
Material
Rock Class
Rock Name
SiO
2
WT%
TiO
2
WT%
Al
2
O
3
WT%
Fe
2
O
3
WT%
Fe
2
O
3
Total
WT%
FeO
WT%
FeO Total
WT%
MnO
WT%
MgO
WT%
CaO
WT%
Na
2
O
WT%
K
2
O
WT%
P
2
O
5
WT%
LOI
WT%
H
2
O
WT%
Total
WT%
Ag
PPM
As
PPM
Ba
PPM
Be
PPM
Bi
PPM
Co
PPM
Cr
PPM
Cs
PPM
Cu
PPM
Dy
PPM
Ga
PPM
ge
PPM
In
PPM
Mo
PPM
Nb
PPM
Ni
PPM
Pb
PPM
Rb
PPM
Sb
PPM
Sc
PPM
Sn
PPM
Sr
PPM
Ti
PPM
U
PPM
V
PPM
W
PPM
Y
PPM
Zn
PPM
Zr
PPM
87
Sr /
86
Sr
RATIO
87
Rb /
86
Sr
RATIO
143
Nd /
144
Nd
RATIO
147
Sm /
144
Nd
RATIO
E Nd
RATIO
206
Pb /
204
Pb
RATIO
207
Pb /
204
Pb
RATIO
208
Pb /
204
Pb
RATIO
208
Pb /
206
Pb
RATIO
176
Hf /
177
Hf
RATIO
176
Lu /
177
Hf
RATIO
187
Re /
188
Os
RATIO
187
Re /
186
Os
RATIO
187
Os /
188
Os
RATIO
187
Os /
186
Os
RATIO
186
Os /
188
Os
RATIO
184
Os /
188
Os
RATIO
10
Be / Be
RATIO
10
Be /
9
Be
RATIO
206
Pb /
207
Pb
RATIO
NI59020605
DETAILS
ICPOES
Rock
Igneous Mafic Volcanic
Basalt
182
201
2
DETAILS
NOT GIVEN
Rock
Igneous Mafic Volcanic
Basalt
51.25
0.81
14.73
3.82
10.22
0.28
5.47
11.73
1.85
0.26
0.13
100
R07
DETAILS
ICPMS
Rock
Igneous Intermediate Volcanic
Andesite
212
24.5
0.87
3.84
0.43
15.1
3.94
6.34
183
0.14
545
24.5
44.7
R07
DETAILS
XRF
Rock
Igneous Intermediate Volcanic
Andesite
52.77
1.21
14.71
14.15
0.22
4.91
9.89
2.04
0.42
0.1
100
Y3
DETAILS
INAA
Rock
Igneous Intermediate Volcanic
Andesite
30
Y3
DETAILS
XRF
Rock
Igneous Intermediate Volcanic
Andesite
53.39
1.27
14.28
13.69
0.21
4.7
9.96
1.98
0.44
0.09
100
218
21
410
14
6.7
180
605
24.3
107
49.3
Y3
DETAILS
EMP (EPMA)
Rock
Igneous Intermediate Volcanic
Andesite
0.28
0.28
270
30
1600
200
09102204-2
DETAILS
ICPMS
Rock
Igneous Mafic Volcanic
Basalt
198.71
23.19
0.73
3.79
0.4
13.97
3.89
5.68
179.92
0.13
557.69
23
44.78
09102204-2
DETAILS
XRF
Rock
Igneous Mafic Volcanic
Basalt
52.74
1.17
15.08
13.98
0.21
4.91
10.09
1.8
0.4
0.1
100
LBI-2
DETAILS
XRF
Rock
Igneous Intermediate Volcanic
Andesite
55.65
55.65
09022312
DETAILS
ICPMS
Rock
Igneous Mafic Volcanic
Basalt
204
18.3
0.82
3.69
0.56
17.9
4.18
6.3
197
0.14
619
24.6
44.8
09022312
DETAILS
MC_TIMS
Rock
Igneous Mafic Volcanic
Basalt
0.703622
0.513092
18.4197
15.5497
38.343
09022312
DETAILS
XRF
Rock
Igneous Mafic Volcanic
Basalt
52.32
1.21
16
14.07
0.21
4.39
10.31
2.03
0.39
0.1
100
O95-6
DETAILS
XRF
Rock
Igneous Intermediate Volcanic
Andesite
51.86
0.97
17.2
11.93
0.19
4.61
11.26
1.67
0.25
0.06
100
130
31
157
8
2.6
177
487
16.8
99
29.7
1141
DETAILS
XRF
Rock
Igneous Intermediate Volcanic
Andesite
52.21
1.04
17.43
12.21
0.17
4.04
11.07
1.7
0.35
0.07
100
627
DETAILS
EMP (EPMA)
Rock
Igneous Unknown Plutonic
Vogesite
36.926
5.104
13.708
11.303
0.13
15.843
0.02
0.442
9.038
92.514
627
DETAILS
EMP (EPMA)
Rock
Igneous Unknown Plutonic
Vogesite
38.019
5.189
14.093
6.787
0.048
18.549
0.071
0.328
9.446
92.53
627
DETAILS
EMP (EPMA)
Rock
Igneous Unknown Plutonic
Vogesite
38.956
4.489
13.069
0.321
13.247
0.096
10.96
11.844
1.953
1.6
96.535
627
DETAILS
EMP (EPMA)
Rock
Igneous Unknown Plutonic
Vogesite
52.41
0.175
1.682
1.469
6.798
0.405
15.15
21.146
0.328
0
99.563
627
DETAILS
EMP (EPMA)
Rock
Igneous Unknown Plutonic
Vogesite
63.055
0.057
22.543
0.311
0
0.017
3.845
8.279
1.325
99.432
627
DETAILS
EMP (EPMA)
Rock
Igneous Unknown Plutonic
Vogesite
36.105
0.115
20.315
15.92
0.087
0.122
21.512
0.008
94.184
1102
DETAILS
XRF
Rock
Igneous Intermediate Volcanic
Andesite
52.83
1.22
14.52
14.2
0.21
4.52
9.78
1.8
0.41
0.08
99.57
5
DETAILS
NOT GIVEN
Rock
Igneous Mafic Volcanic
Basalt
52.81
1.23
14.75
13.52
0.2
5
9.98
2.03
0.38
0.1
100
JCP-1
DETAILS
MS_ID
Rock
Igneous Mafic Volcanic
Tholeiite
0.23
JCP-1
DETAILS
MS_ID
Rock
Igneous Intermediate Volcanic
Trachyandesite
3.85
0.2
1
2
3
4
5
6
7
8
9
. . .
18
Next
Data from the SESAR Database
Show 7 Results
Hide Results
IGSN
Object Name
Object Type
Object Class
Material
Field Name
Link
MGD0000JV
IO-19
Individual Sample
Rock>Igneous>Volcanic>Mafic
basalt lava
Details
MGD0000IQ
Oshima: OSH 02
Individual Sample
Details
MGD0000IP
Oshima: OSH 01
Individual Sample
Details
MGD0000IO
Oshima: OKA 01
Individual Sample
Details
MGD0000JU
IO-6
Individual Sample
Rock>Igneous>Volcanic>Mafic
basalt lava
Details
MGD0000JT
IO-5
Individual Sample
Rock>Igneous>Volcanic>Mafic
basalt lava
Details
MGD0000IN
Oshima: MIH 01
Individual Sample
Details
Data from the MaGa Database
Location: Ohtsu Well
(View Details at MaGa DB)
Description: unknown
Hazard Description: unknown
Type: well
Region: Tokyo, Japan
Country: Japan
Volcanic Complex: Oshima
Gas Concentration Data:
Measurement Name
Detail
Date
Specie
Concentration
Unit of Measure
Oht-1
Detail
2005/07/21
CO2
902.26
micromol/mol
Oht-1
Detail
2005/07/21
S (total)
55.35
micromol/mol
Oht-1
Detail
2005/07/21
SO2
35.41
micromol/mol
Oht-1
Detail
2005/07/21
H2S
19.83
micromol/mol
Oht-1
Detail
2005/07/21
HF
9.608
micromol/mol
Oht-1
Detail
2005/07/21
NH3
0.725
micromol/mol
Oht-1
Detail
2005/07/21
Ar
0.49
micromol/mol
Oht-1
Detail
2005/07/21
N2
20.993
micromol/mol
Oht-1
Detail
2005/07/21
He
0
micromol/mol
Oht-1
Detail
2005/07/21
H2
0.011
micromol/mol
Oht-1
Detail
2005/07/21
O2
10.558
micromol/mol
Oht-1
Detail
2005/07/21
CH4
0
micromol/mol
Oht-1
Detail
2005/07/21
CO
0
micromol/mol
Gas Isotope Data:
Measurement Name
Detail
Date
Isotope
Abundance
Unit of Measure
Oht-1
Detail
2005/07/21
d15N
0
permill_vs_smow
Gas Temperature Data:
Measurement Name
Detail
Date
Temperature
Unit of Measure
Oht-1
Detail
2005/07/21
36.4
°C
Location: Koshimizu Well
(View Details at MaGa DB)
Description: unknown
Hazard Description: unknown
Type: well
Region: Tokyo, Japan
Country: Japan
Volcanic Complex: Oshima
Gas Concentration Data:
Measurement Name
Detail
Date
Specie
Concentration
Unit of Measure
Kos-1
Detail
2005/07/21
CO2
881.82
micromol/mol
Kos-1
Detail
2005/07/21
S (total)
71.69
micromol/mol
Kos-1
Detail
2005/07/21
SO2
62.14
micromol/mol
Kos-1
Detail
2005/07/21
H2S
9.45
micromol/mol
Kos-1
Detail
2005/07/21
HF
10.3
micromol/mol
Kos-1
Detail
2005/07/21
NH3
0.809
micromol/mol
Kos-1
Detail
2005/07/21
Ar
0.588
micromol/mol
Kos-1
Detail
2005/07/21
N2
25.399
micromol/mol
Kos-1
Detail
2005/07/21
He
0
micromol/mol
Kos-1
Detail
2005/07/21
H2
0.01
micromol/mol
Kos-1
Detail
2005/07/21
O2
9.38
micromol/mol
Kos-1
Detail
2005/07/21
CH4
0
micromol/mol
Kos-1
Detail
2005/07/21
CO
0
micromol/mol
Gas Isotope Data:
Measurement Name
Detail
Date
Isotope
Abundance
Unit of Measure
Kos-1
Detail
2005/07/21
d15N
-0.6
permill_vs_smow
Gas Temperature Data:
Measurement Name
Detail
Date
Temperature
Unit of Measure
Kos-1
Detail
2005/07/21
48.5
°C
Location: Univ. of Tokyo Obs. Well
(View Details at MaGa DB)
Description: unknown
Hazard Description: unknown
Type: well
Region: Tokyo, Japan
Country: Japan
Volcanic Complex: Oshima
Gas Concentration Data:
Measurement Name
Detail
Date
Specie
Concentration
Unit of Measure
Uto-1
Detail
2005/07/22
H2O
744.81
micromol/mol
Uto-1
Detail
2005/07/22
CO2
521.88
micromol/mol
Uto-1
Detail
2005/07/22
S (total)
1.13
micromol/mol
Uto-1
Detail
2005/07/22
H2S
1.13
micromol/mol
Uto-1
Detail
2005/07/22
HCl
10.32
micromol/mol
Uto-1
Detail
2005/07/22
HF
1.467
micromol/mol
Uto-1
Detail
2005/07/22
NH3
1.105
micromol/mol
Uto-1
Detail
2005/07/22
Ar
4.661
micromol/mol
Uto-1
Detail
2005/07/22
N2
384.388
micromol/mol
Uto-1
Detail
2005/07/22
He
0
micromol/mol
Uto-1
Detail
2005/07/22
H2
0.026
micromol/mol
Uto-1
Detail
2005/07/22
O2
75.02
micromol/mol
Uto-1
Detail
2005/07/22
CH4
0
micromol/mol
Uto-1
Detail
2005/07/22
CO
0
micromol/mol
Uto-2
Detail
2005/07/22
H2O
416.51
micromol/mol
Uto-2
Detail
2005/07/22
CO2
344.06
micromol/mol
Uto-2
Detail
2005/07/22
S (total)
0.48
micromol/mol
Uto-2
Detail
2005/07/22
H2S
0.48
micromol/mol
Uto-2
Detail
2005/07/22
HCl
4.202
micromol/mol
Uto-2
Detail
2005/07/22
HF
0.346
micromol/mol
Uto-2
Detail
2005/07/22
NH3
0.201
micromol/mol
Uto-2
Detail
2005/07/22
Ar
6.529
micromol/mol
Uto-2
Detail
2005/07/22
N2
540.343
micromol/mol
Uto-2
Detail
2005/07/22
He
0
micromol/mol
Uto-2
Detail
2005/07/22
H2
0.019
micromol/mol
Uto-2
Detail
2005/07/22
O2
103.814
micromol/mol
Uto-2
Detail
2005/07/22
CH4
0
micromol/mol
Uto-2
Detail
2005/07/22
CO
0
micromol/mol
Gas Isotope Data:
Measurement Name
Detail
Date
Isotope
Abundance
Unit of Measure
Uto-1
Detail
2005/07/22
d15N
0.9
permill_vs_smow
Uto-2
Detail
2005/07/22
d15N
0.9
permill_vs_smow
Gas Temperature Data:
Measurement Name
Detail
Date
Temperature
Unit of Measure
Uto-1
Detail
2005/07/22
81
°C
Uto-2
Detail
2005/07/22
81
°C
Location: Hotel Onsen Well
(View Details at MaGa DB)
Description: unknown
Hazard Description: unknown
Type: well
Region: Tokyo, Japan
Country: Japan
Volcanic Complex: Oshima
Gas Concentration Data:
Measurement Name
Detail
Date
Specie
Concentration
Unit of Measure
Ons-1
Detail
2005/07/22
CO2
965.75
micromol/mol
Ons-1
Detail
2005/07/22
S (total)
12.76
micromol/mol
Ons-1
Detail
2005/07/22
H2S
12.76
micromol/mol
Ons-1
Detail
2005/07/22
HF
3.316
micromol/mol
Ons-1
Detail
2005/07/22
NH3
1.364
micromol/mol
Ons-1
Detail
2005/07/22
Ar
0.289
micromol/mol
Ons-1
Detail
2005/07/22
N2
12.368
micromol/mol
Ons-1
Detail
2005/07/22
He
0
micromol/mol
Ons-1
Detail
2005/07/22
H2
0.126
micromol/mol
Ons-1
Detail
2005/07/22
O2
3.918
micromol/mol
Ons-1
Detail
2005/07/22
CH4
0.108
micromol/mol
Ons-1
Detail
2005/07/22
CO
0
micromol/mol
Ons-2
Detail
2005/07/22
CO2
944.52
micromol/mol
Ons-2
Detail
2005/07/22
S (total)
17.43
micromol/mol
Ons-2
Detail
2005/07/22
H2S
17.43
micromol/mol
Ons-2
Detail
2005/07/22
HF
2.582
micromol/mol
Ons-2
Detail
2005/07/22
NH3
2.256
micromol/mol
Ons-2
Detail
2005/07/22
Ar
0.472
micromol/mol
Ons-2
Detail
2005/07/22
N2
20.788
micromol/mol
Ons-2
Detail
2005/07/22
He
0
micromol/mol
Ons-2
Detail
2005/07/22
H2
0.277
micromol/mol
Ons-2
Detail
2005/07/22
O2
11.425
micromol/mol
Ons-2
Detail
2005/07/22
CH4
0.237
micromol/mol
Ons-2
Detail
2005/07/22
CO
0
micromol/mol
Gas Isotope Data:
Measurement Name
Detail
Date
Isotope
Abundance
Unit of Measure
Ons-1
Detail
2005/07/22
d15N
-2.5
permill_vs_smow
Ons-2
Detail
2005/07/22
d15N
-2.2
permill_vs_smow
Gas Temperature Data:
Measurement Name
Detail
Date
Temperature
Unit of Measure
Ons-1
Detail
2005/07/22
84.9
°C
Ons-2
Detail
2005/07/22
84.9
°C
Location: Izu-Oshima
(View Details at MaGa DB)
Description: Izu-Oshima is a 15x 9 km active volcanic island located around 100 km SSW of Tokyo. The centre of the island is occupied by a caldera complex with a diameter of 3 km.
Hazard Description: not reported
Type: soil_diffuse_emission
Region: Tokyo, Japan
Country: Japan
Volcanic Complex: Izu Ōshima
Gas Flux Data:
Measurement Name
Detail
Date
Specie
Flux
Std. Dev.
Unit of Measure
Izu-Oshima_01011999
Detail
1999/01/01
CO2
3
0
Mg/d
Location: Miharayama, Igashi-Izu monogenetic volcano field, Japan
(View Details at MaGa DB)
Description: The Higashi-Izu monogenetic volcanic group, which consists of more than 60 volcanoes, overlies the polygenetic volcanoes in the eastern part of the Izu peninsula, Japan, which are distributed over the area of 350 km2. Recent volcanic activity occurred offshore, e.g., at the Izu-Oshima volcano, which erupted in 1986 and a submarine eruption of the small new Teishi knoll off eastern Izu Peninsula in 1989. Actually it is characterized by diffuse degassing.
Hazard Description: not reported
Type: soil_diffuse_emission
Region: Tokyo, Japan
Country: Japan
Volcanic Complex: Miharayama, Igashi-Izu monogenetic volcano field
Gas Flux Data:
Measurement Name
Detail
Date
Specie
Flux
Std. Dev.
Unit of Measure
Miharayama_10072013
Detail
2013/07/10
CO2
22
2
Mg/d