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Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Ofu-Olosega
A narrow strait (just left of center) separates the two triangular islands of Ofu (left) and Olosega (right) in eastern Samoa. The islands are formed by two eroded, coalescing shield volcanoes. The narrow, steep-sided ridge forming the W side of Ofu Island is cut by volcanic dikes and an intrusive plug forms the sharp spire on Ofu Island to the left. A submarine eruption took place in 1866 at the far end of the two islands, 3 km SE of Olosega, along the ridge connecting Olosega with Ta'u Island. Photo by Peter Craig, 1995 (U.S. National Park Service).
Volcano Number:
244010
Volcano Name:
Ofu-Olosega
Country:
United States
Volcano Type:
Shield(s)
Last Eruption:
1866 CE
Elevation:
639m
Tectonic Setting:
Subduction zone / Oceanic crust (< 15 km)
Pop. within 5km:
220
Pop. within 10km:
384
Pop. within 30km:
1387
Pop. within 100km:
1387
Latitude:
-14.175
Longitude:
-169.618
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
244010
Ofu-Olosega
14804
Confirmed Eruption
2
Submarine vent 3 km SE of Olosega
Historical Observations
1866/9/12
1866/11/15
Emissions Data from the Global Volcanism Program of the Smithsonian Institution
Sorry. No emissions data found for this volcano.
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 13 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
PETDB-3152-OFU-04-06
DETAILS
EMP
Rock
Igneous Mafic Volcanic
Basalt
50.44
5.87
14.5
9.93
0.2
9.84
9.58
4.69
1.71
100
PETDB-3152-OFU-04-06
DETAILS
IMP
Rock
Igneous Mafic Volcanic
Basalt
821
72.4
0.84
87
961
PETDB-3152-OFU-04-06
DETAILS
LA-MC-ICPMS
Rock
Igneous Mafic Volcanic
Basalt
0.70469
PETDB-3152-OFU-04-06
DETAILS
LA-MC-ICPMS
Rock
Igneous Mafic Volcanic
Basalt
0.70469
PETDB-3152-OFU-04-06
DETAILS
LA-MC-ICPMS
Rock
Igneous Mafic Volcanic
Basalt
0.70458
04-13
DETAILS
ICPMS
Rock
Igneous Intermediate Volcanic
Hawaiite
279
0.309
9.14
55.52
2.898
30.7
22.1
723
1.232
40
351
04-13
DETAILS
XRF
Rock
Igneous Intermediate Volcanic
Hawaiite
44.75
5.19
14.51
14.29
0.199
5.96
9.74
3.34
1.33
0.688
99.997
9
15
30
29
424
171
04-14
DETAILS
ICPMS
Rock
Igneous Unknown Volcanic
Not-given
112
0.041
4.66
21.52
1.164
11.4
45
292
0.445
20
148
04-14
DETAILS
XRF
Rock
Igneous Unknown Volcanic
Not-given
45.36
3.55
7.56
12.7
0.172
16.02
12.49
1.34
0.52
0.28
99.992
1437
48
15
448
328
110
04-09
DETAILS
ICPMS
Rock
Igneous Unknown Volcanic
Ankaramite
216
0.161
7.01
37.99
2.432
21.1
33.9
503
0.807
30.1
250
04-09
DETAILS
XRF
Rock
Igneous Unknown Volcanic
Ankaramite
44.57
5.36
11.65
14.59
0.193
8.66
11.31
2.23
0.97
0.482
100
276
127
23
207
407
142
04-16
DETAILS
XRF
Rock
Igneous Mafic Volcanic
Basalt
46.14
5.35
15.25
12.65
0.175
4.87
10.72
3.18
1.16
0.492
99.987
58
118
24
72
358
131
04-16
DETAILS
ICPMS
Rock
Igneous Mafic Volcanic
Basalt
238
0.213
6.97
42.23
2.35
27.6
23.3
639
0.893
32
253
Data from the SESAR Database
Show 8 Results
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IGSN
Object Name
Object Type
Object Class
Material
Field Name
Link
URI0000O5
NA112-022-C-GSO
Grab
Rock>Sedimentary
Sediment
Details
URI0000OK
NA112-084-C-GSO
Grab
Rock>Igneous>Volcanic
Lava
Details
URI0000OL
NA112-085-G-GSO
Grab
Rock>Igneous>Volcanic
Lava
Details
URI0000OM
NA112-090-C-GSO
Grab
Rock>Igneous>Volcanic
Lava
Details
URI0000O4
NA112-021-C-GSO
Grab
Rock>Sedimentary
Sedimentary
Details
SRH00015T
ALIA 105
Dredge
Details
URI0000P6
NA112-083-C-GSO
Grab
Rock>Igneous>Volcanic
Lava
Details
URI0000P7
NA112-082-C-GSO
Grab
Rock>Igneous>Volcanic
Lava
Details
Data from the MaGa Database
Sorry. No data exist for this volcano in the MaGa database.