Tsunamis in Lake Taupo, New Zealand, on the 30th November 2022: observations, interpretation and implications
| Autor: | Power, William, Roger, Jean, Gusman, Aditya, Wang, Xiaoming, Burbidge, David, Shanks, Jackson, Rosenberg, Michael, Asher, Cameron, Britten, Karen, Johnson, Richard, Moore, Matthew, Moran, Cameron, Brakenrig, Thomas, Lauren, Coup, MacDonald, Nick |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Zdroj: | XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| Popis: | A magnitude 5.6 earthquake occurred under Lake Taupo in New Zealand at 11:47pm (local time) on the 30th November 2022. Subsequent to this earthquake evidence of tsunami waves was discovered around the lake shore, and also recorded on three water-level gauges. Surveys were made to record inundation heights and extents around the lake. Interpretation of the collected data suggests that there were at least two tsunami sources: 1) a largely sub-lacustrine landslide occurring in Wharewaka Bay near Taupo township, and 2) a tsunami generated by movement of the lake bed associated with the earthquake. The observed impacts of the landslide-caused tsunami appear to mainly affect an area of the lake within a few hundred metres of the landslide source, while those generated by the co-seismic lake-bed movement are more widely distributed around the lake, particularly on the eastern side. Tsunami observations have been interpreted alongside seismic and geodetic data to better understand the source processes that generated the tsunami waves. Modelling and further work to quantify both tsunami sources are ongoing and latest results will be presented. We will describe the installation of new water-level instruments to better monitor lake water disturbances, e.g., caused by volcanic activities, and discuss the implications of this event for our understanding of the hazard and risk in the Taupo region. The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) |
| Databáze: | OpenAIRE |
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