 Atafu Atoll |    |
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| Index | SMNT-086S-1725W |
Classification | Intermediate C2 Atoll |
| Location | 8º 33.00' S
172º 30.00' W |
Elongation
Irregularity | 1.66 ± 0.22
1.43 ± 0.05 |
| Plate Age | |
Oceanic Province | |
| Region | Tokelau Seamounts |
Alternative Names | |
| Plate | Pacific Plate |
Age | |
| Tectonic Setting | Hotspot Trail |
Seamount Top | 400 m |
| Volume | 7053 km3 |
Ocean Bottom | 4608 m |
Shelf Edge
| 492 % |
Volcanic Activity | Extinct |
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| | Description | | Atafu Atoll is located at 8¿ 32.9' S, 172¿ 31.0' W and is part of the Tokelau Seamounts on the Pacific Plate. It is 4208 m high with the top at -400 m and the ocean bottom at -4608 m. The atoll has a volume of 7053 km3 and is slightly elongated with an azimuth of approximately 122¿. The atoll has relatively smooth edges with two predominate rifts observed, one to the northwest and the other to the southwest. The top surface is relatively flat with two summits. A saddle connects Atafu to Pogisa and Ufiata seamounts to the north. Dredge AVON2-D60 was taken on the northwest rift and dredge AVON2-D61 was taken on the southwest rift. |
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Atafu Atoll -- Multibeam data merged with predicted satellite bathymetry |
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Atafu Atoll -- Multibeam bathymetry |
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Atafu Atoll -- Predicted satellite bathymetry |
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Atafu Atoll -- Residual bathymetry |
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Tokelau Seamounts -- Multibeam data merged with predicted satellite bathymetry |
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Tokelau Seamounts -- Multibeam bathymetry |
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Tokelau Seamounts -- Predicted satellite bathymetry |
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Tokelau Seamounts -- Residual bathymetry |
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Atafu Atoll -- Multibeam data merged with predicted satellite bathymetry |
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Atafu Atoll -- Multibeam bathymetry |
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Atafu Atoll -- Predicted satellite bathymetry |
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Atafu Atoll -- Residual bathymetry |
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Tokelau Seamounts -- Multibeam data merged with predicted satellite bathymetry |
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Tokelau Seamounts -- Multibeam bathymetry |
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Tokelau Seamounts -- Predicted satellite bathymetry |
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Tokelau Seamounts -- Residual bathymetry |
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| Depth |
Azimuth |
Area |
Length |
Width |
Elongation |
Contour |
Ellipse |
Irregularity |
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| m |
degrees |
km2 |
km |
km |
ratio |
km |
km |
ratio |
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| 1873 |
113.4 |
213.2 |
31.1 |
16.2 |
1.917 |
79.9 |
55.8 |
1.431 |
| 2294 |
122.8 |
372.7 |
31.3 |
20.3 |
1.542 |
105.3 |
70.8 |
1.487 |
| 2714 |
132.9 |
575.0 |
36.6 |
24.0 |
1.525 |
121.5 |
87.8 |
1.383 |
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| 33 % Multibeam Coverage |
1.66 ± 0.22 |
1.43 ± 0.05 |
| 4208 m High |
| 2 Summits |
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