Holocene Tsunamis in Avachinsky Bay, Kamchatka, Russia

Pinegina, Tatiana K.; Bazanova, L. I.; Zelenin, Egor; Bourgeois, Joanne; Kozhurin, Andrey; Medvedev, Igor; Vydrin, Danil S.

doi:10.1007/978-3-030-03760-4_17

Cited by 1 publication

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“…The Holocene tephra sequence has been thoroughly studied over the last four decades (e.g., Braitseva et al, 1978aBraitseva et al, , 1995Braitseva et al, , 1997Braitseva et al, , 1998Kyle et al, 2011;Pevzner et al, 2006;Plunkett et al, 2015;Ponomareva, 1990;Ponomareva et al, 2015Ponomareva et al, , 2017. These studies resulted in the continuously updated all-Kamchatka tephrochronological framework extensively used for dating and correlation of various deposits including those formed by volcanic and co-seismic processes (e.g., Braitseva et al, 1978b;Hulse et al, 2011;Kozhurin et al, 2006;Pinegina et al, 2018).…”

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confidence: 99%

Tephrochronological dating of paleoearthquakes in active volcanic arcs: A case of the Eastern Volcanic Front on the Kamchatka Peninsula (northwest Pacific)

Zelenin

Kozhurin

Пономарева

et al. 2019

J Quaternary Science

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Investigation of active faults is crucial for the seismic hazard assessment and, in the case of volcanic belts, it provides a deeper understanding of the interactions between volcanism and tectonic faulting. In this study, we report the results of the first paleoseismological and tephrochronological investigation undertaken on Holocene faulting in Kamchatka's volcanic belts. The studied trenches and additional excavations are located along the axial fault zone of the Eastern Volcanic Front, where the earlier dated tephra layers provide a robust age control of the faulting events. Electron microprobe analysis of glass from 22 tephra samples permitted correlations among the disparate tephra profiles for constructing a summary tephra sequence. The latter, together with published geochronological data, allowed the construction of a Bayesian age model. Detailed examination of the tephra layers deformed by faulting allowed us to reconstruct and date six faulting events with the offsets of 1 to 20 cm indicating paleoearthquakes with magnitudes of Mw < 5.4. Holocene crustal seismicity of the Eastern Volcanic Front manifests temporal clustering rather than a uniform flux of events. However, no correlation between dated seismic events and the largest Holocene eruptions of proximal volcanoes was observed.

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