Kavachi

Short description: Active submarine volcano in the Pacific Ocean

Kavachi

Kavachi erupting on May 14, 2000

Summit depth| 20 m (66 ft)
Location
Location| Solomon Islands
Coordinates|  [ ⚑ ] : 08°59′37″S 157°58′21″E﻿ / ﻿8.99361°S 157.9725°E﻿ / -8.99361; 157.9725
Geology
Type| Submarine volcano
Last eruption| 2022

Kavachi is one of the most active submarine volcanoes in the south-west Pacific Ocean.[1] Located south of Vangunu Island in the Solomon Islands, it is named after a sea god of the New Georgia Group islanders and is also referred to locally as Rejo te Kavachi ("Kavachi's oven"). The volcano has become emergent and then been eroded back into the sea at least eight times since its first recorded eruption in 1939.[2]

## Geography

In May 2000, an international research team aboard the CSIRO research vessel FRANKLIN fixed the position of the volcano at 8° 59.65'S, 157° 58.23'E. At that time the vent of the volcano was below sea level, but frequent eruptions ejected molten lava up to 70 m (230 ft) above sea level, and sulfurous steam plumes up to 500 m (1,600 ft). The team mapped a roughly conical feature rising from 1,100 m (3,600 ft) water depth, with the volcano having a basal diameter of about 8 km (5.0 mi).[3][4]

## Eruptions

Kavachi erupting, 31 October 2016

When the volcano erupted in 2003, a 15 m-high (49 ft) island formed above the surface, but it disappeared soon after. Additional eruptive activity was observed and reported in March 2004 and April 2007.[5][6] More recent volcanic activity can be inferred from observations of discolored water around the volcano, in 2020 and January 2021.[1]

## Marine life

In 2015, marine wildlife was found living inside Kavachi's crater, including the scalloped hammerhead, the silky shark, and the sixgill stingray.[7]

It has subsequently been given the nickname "Sharkcano" by various media outlets.[8][9][10]

## See also

* List of new islands
* Woodlark Basin

## References

1. ↑ 1.0 1.1 "Kavachi". Smithsonian Institution. https://volcano.si.edu/volcano.cfm?vn=255060.
2. ↑ "Kavachi". Smithsonian Institution. https://volcano.si.edu/volcano.cfm?vn=255060.
3. ↑ "Fiery birth of new Pacific Island". Commonwealth Scientific and Industrial Research Organisation (via Way Back Machine). 24 May 2000. Archived from the original on 17 February 2012. https://web.archive.org/web/20120217172503/http://www.csiro.au/files/mediarelease/mr2000/Prvolcano.htm.
4. ↑ "Volcano Island Born". All Things Considered. US National Public Radio. 26 May 2000. https://www.npr.org/templates/story/story.php?storyId=1074693.
5. ↑ "Kavachi". Smithsonian Institution. https://volcano.si.edu/volcano.cfm?vn=255060.
6. ↑ "Kavachi Submarine Volcano". Corey Howell, The Wilderness Lodge. http://www.thewildernesslodge.org/kavachi.htm.
7. ↑ Sharks Discovered Inside Underwater Volcano (video). National Geographic. 9 July 2015. Archived from the original on 2021-12-21 - via YouTube.
8. ↑ Amanda Kooser. "'Sharkano': NASA Spots Eruption of Underwater Volcano Where Sharks Live". https://www.cnet.com/science/sharkcano-nasa-sees-eruption-of-volcano-where-sharks-live/.
9. ↑ "NASA captures eruption of 'Sharkcano'". CNN. 2022-05-24. https://www.cnn.com/2022/05/24/world/undersea-volcano-sharks-nasa-scn/index.html.
10. ↑ "Watch out for the Sharkcano! What happens when an underwater volcano erupts?". The Guardian. 2022-05-23. https://www.theguardian.com/environment/2022/may/23/watch-out-sharkcano-underwater-volcano-erupts-kavachi.

## Further reading

* Baker, E.T., Massoth, G.J., de Ronde, C.E.J., Lupton, J.E., Lebon, G., and McInnes, B.I.A. 2002. Observations and sampling of an ongoing subsurface eruption of Kavachi volcano, Solomon Islands, May 2000, Geology, 30 (11), 975–978. (geology.geoscienceworld.org/cgi/reprint/30/11/975.pdf)
* Dunkley, P.M., 1983. Volcanism and the evolution of the ensimatic Solomon Islands Arc, in Shimozuro, D. And Yokoyama, I.,(eds.), Arc Volcanism: Physics and Tectonics. Tokyo, Terrapub, 225–241.
* Johnson, R.W. and Tuni, D. 1987. Kavachi, an active forearc volcano in the western Solomon Islands: Reported eruptions between 1950 and 1982, in B. Taylor and N.F. Exon, (eds.), 1987, Marine Geology, Geophysics, and Geochemistry of the Woodlark Basin-Solomon Islands, Circum-Pacific Council for Energy and Mineral Resources Earth Science Series, v. 7: Houston, Texas, Circum-Pacific Council for Energy and Mineral Resources.

## External links

* Kavachi in action

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