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France · Shield volcano

Macdonald seamount

Macdonald

Type
Shield volcano
Elevation
39m (submarine)
Last eruption
1989
Photo temporarily unavailableView on GVP →
Type
Shield volcano
Country
France
Region
Southern Pacific / Austral-Cook Hotspot Volcano Group
Elevation
39m (submarine)
Coordinates
-28.980, -140.250
Last eruption
1989
Tectonic setting
Intraplate / Oceanic crust (< 15 km)
Landform
Shield
Major rock type
Basalt / Picro-basalt

Geological summary

Discovered by the detection of teleseismic waves in 1967, Macdonald seamount (also known as Tamarii seamount) rises from a depth of about 1,800 m to within 27 m of the ocean surface at the eastern end of the Austral Islands.

Excerpt from the Global Volcanism Program, Smithsonian Institution · Read the full summary on GVP →

From Wikipedia

Macdonald seamount is a seamount in Polynesia, southeast of the Austral Islands and in the neighbourhood of a system of seamounts that include the Ngatemato seamounts and the Taukina seamounts. It rises 4,200 metres (13,800 ft) from the seafloor to a depth of about 40 metres (130 ft) and has a flat top, but the height of its top appears to vary with volcanic activity. There are some subsidiary cones such as Macdocald seamount. The seamount was discovered in 1967 and has been periodically active with gas release and seismic activity since then. There is hydrothermal activity on Macdonald, and the vents are populated by hyperthermophilic bacteria.

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Eruption history

12 recordedGlossary

Record summary

Confirmed eruptions
10
Uncertain eruptions
2
Span of confirmed record
1967 – 1989
Largest confirmed eruption
VEI 0 (1987, the most recent of 10)
Confirmed eruptions since 1900
10
Summary (VEI over time)
Click a bar to see individual eruptions · Use arrow keys to move between bars, Enter to open
1928~1934 · 1 eruptions · max VEI 01934~1940 · 1 eruptions · max VEI 01963~1969 · 1 eruptions · max VEI 01975~1981 · 4 eruptions · max VEI 01981~1987 · 5 eruptions · max VEI 019281940195819691981

Detailed timeline

  1. 1987VEI 0Observed
    1987-06-04 – 1989-01-28
  2. 1986VEI 0Observed
    1986-05-16 – 1986-08-02
  3. 1983VEI 0Observed
    1983-03-14 – 1983-05-21
  4. 1983VEI 0Observed
    1983-10-27 – 1984-01-03
  5. 1982VEI 0Observed
    1982-03-01 – 1982-06-06
  6. 1980VEI 0Observed
    1980-02-12 – 1980-02-13
  7. 1980VEI 0Observed
    1980-11-10 – 1981-02-15
  8. 1979VEI 0Observed
    1979-09-30 – 1979-09-30
  9. 1977VEI 0Observed
    1977-12-10 – 1977-12-15
  10. 1967VEI 0Observed
    1967-05-29 – 1967-05-29
  11. 1936VEI 0Method not stated
    1936-07-02 – end unknown
    Volcano Uncertain: pumice rafts in South Pacific
  12. 1928VEI 0Method not stated
    1928-07-02 – end unknown
    Volcano Uncertain: pumice rafts in South Pacific

Nearby volcanoes

External links

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