Teahitiʻa

Teahitiʻa
Teahitiʻa
	Map of the Teahitiʻa Seamount
Highest point
Elevation	−1,450 m (−4,760 ft)
Coordinates	17°34′S 148°51′W / 17.57°S 148.85°W
Geography
Location	French Polynesia
Geology
Mountain type	Submarine volcano
Volcanic arc/belt	Society hotspot
Last eruption	10 January 1985 - 25 January 1985

Teahitiʻa ("Standing Fire")^[1] is a submarine volcano, located 40 km (25 mi) northeast of the southeast tip of Tahiti of the Society Islands in the Pacific Ocean, with its peak 1450 meters below the water surface.^[1] It belongs to the Society hotspot. Teahitiʻa's last eruption occurred in 1985.^[2]

The seamount has four prominent cones.^[1] Submersible dives in 1986 and 1989 found two active hydrothermal fields on the volcano's flanks.^[3] A further dive in 2013 found ongoing hydrothermal venting.^[1]

Earthquake swarms in March 1982, July 1983, December 1983, and January 1985 have been associated with submarine eruptions.^[4]^[5] On 16 March 2008 Teahitiʻa was the epicentre of an earthquake measuring 3.2 on the Richter scale. The weak tremor was felt in Tahiti, causing the beginnings of panic in the population unaccustomed to these seismic phenomena and fearing a tidal wave.

References

^ ^a ^b ^c ^d ^e German, Christopher R.; Resing, Joseph A.; Xu, Guangyu; Yeo, Isobel A.; Walker, Sharon L.; Devey, Colin W.; Moffett, James W.; Cutter, Gregory A.; Hyvernaud, Olivier; Reymond, Dominique (2020). "Hydrothermal Activity and Seismicity at Teahitia Seamount: Reactivation of the Society Islands Hotspot?". Front. Mar. Sci. 7. doi:10.3389/fmars.2020.00073. hdl:1912/25610.
^ ^a ^b "Teahitia". Global Volcanism Program. Retrieved 18 December 2022.
^ "Teahitia - General Information". Global Volcanism Program. Retrieved 18 December 2022.
^ "Teahitia - Eruptive History". Global Volcanism Program. Retrieved 18 December 2022.
^ Talandier, J.; Okal, E. A. (1984). "The volcanoseismic swarms of 1981-1983 in the Tahiti-Mehetia area, French Polynesia". Journal of Geophysical Research. 89 (B13): 11216–11234. Bibcode:1984JGR....8911216T. doi:10.1029/JB089iB13p11216.

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[German2020-1] German, Christopher R.; Resing, Joseph A.; Xu, Guangyu; Yeo, Isobel A.; Walker, Sharon L.; Devey, Colin W.; Moffett, James W.; Cutter, Gregory A.; Hyvernaud, Olivier; Reymond, Dominique (2020). "Hydrothermal Activity and Seismicity at Teahitia Seamount: Reactivation of the Society Islands Hotspot?". Front. Mar. Sci. 7. doi:10.3389/fmars.2020.00073. hdl:1912/25610.

[GVP-2] "Teahitia". Global Volcanism Program. Retrieved 18 December 2022.

[3] "Teahitia - General Information". Global Volcanism Program. Retrieved 18 December 2022.

[4] "Teahitia - Eruptive History". Global Volcanism Program. Retrieved 18 December 2022.

[5] Talandier, J.; Okal, E. A. (1984). "The volcanoseismic swarms of 1981-1983 in the Tahiti-Mehetia area, French Polynesia". Journal of Geophysical Research. 89 (B13): 11216–11234. Bibcode:1984JGR....8911216T. doi:10.1029/JB089iB13p11216.

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