Seiche Effects in Lake Tekapo, New Zealand, in an Mw8.2 Alpine Fault Earthquake

Wang, Xiaoming; Holden, Caroline; Power, William; Liu, Yaoru; Mountjoy, Joshu

doi:10.1007/s00024-020-02595-w

Cited by 4 publications

(1 citation statement)

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“…To date, only a few seismic seiches have been recorded due to a lack of quantitative data, e.g. tide gauge records (Wang and others, 2020). Existing reports have demonstrated that ice cover does not prevent seiche oscillations (Sturova, 2007; Zyryanov, 2011).…”

Section: Discussionmentioning

confidence: 99%

Lake ice deformation on Khovsgol Lake from Sentinel data before, during and after the 2021 Mw 6.7 earthquake in Turt, Mongolia

Wen

2022

J. Glaciol.

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Khovsgol Lake, a seasonal ice-covered lake located in boreal Siberia, plays important economic, transportation and agricultural roles for local residents. On 11 January 2021, an Mw 6.7 earthquake struck the center of this lake, providing a unique opportunity to better understand lake ice movement, ridge distribution, and hydraulic and hydrodynamic processes, as a result of the mainshock. We use a pixel-tracking method on both Sentinel-1 synthetic aperture radar and Sentinel-2 optical remote-sensing data covering this lake before, during and after the mainshock to obtain lake-ice displacement. Combining these measurements with different viewing geometries, we determine the locations of pressure ridges in each period and derive their relative 3D displacement maps with a precision of <2.2 m. Our results indicate a large E-W displacement of up to 10.3 m and a vertical displacement of up to 4.6 m during the coseismic period, which has a distinctly different magnitude and pattern of displacement compared to the pre- and post-event periods. Given the ice motion pattern and magnitude, we speculate that the unique ice displacement of Khovsgol Lake may have been caused by a rare seismic seiche after the mainshock.

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Section: Discussionmentioning

confidence: 99%