EGU General Assembly 2020
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Hydroacoustic measurements of the 2004 submarine eruption near Nightingale Island, Tristan da Cunha

Dirk Metz1, Ingo Grevemeyer2, Marion Jegen2, Wolfram Geissler3, and Julien Vergoz4
Dirk Metz et al.
  • 1Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan
  • 2Helmholtz Center for Ocean Research Kiel (GEOMAR), Kiel, Germany
  • 3Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI), Bremerhaven, Germany
  • 4French Alternative Energies and Atomic Energy Commission (CEA), Bruyères-le-Châtel, France

Little is known about active volcanism in the remote regions of the global ocean. Here, we resort to long‐range acoustic measurements to study the July/August 2004 eruption at Isolde, a submarine volcanic cone in the Tristan da Cunha archipelago, South Atlantic Ocean. Underwater sound phases associated with the event were recorded as far as Cape Leeuwin, Western Australia, where a bottom-moored hydrophone array is operated as part of the International Monitoring System (IMS). IMS hydrophone data in combination with local seismic observations suggest that the center of activity is located east of Nightingale Island, where a recent seafloor mapping campaign aboard R/V Maria S Merian (MSM20/2) has revealed a previously unknown, potentially newly formed stratocone. Transmission loss modeling via the parabolic equation approach indicates that low-frequency sound phases travel at shallow depths near and within the Antarctic Circumpolar Current, thereby avoiding bathymetric interference along the 10,265 km source-receiver path. Our study highlights the potential of the IMS network for the detection and study of future eruptions both at Isolde and elsewhere. Implications for test-ban treaty monitoring and volcano early warning will be discussed.

How to cite: Metz, D., Grevemeyer, I., Jegen, M., Geissler, W., and Vergoz, J.: Hydroacoustic measurements of the 2004 submarine eruption near Nightingale Island, Tristan da Cunha , EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-12289,, 2020.

This abstract will not be presented.