A millennial-scale record of Holocene tsunamis on the Kronotskiy Bay coast, Kamchatka, Russia |
| |
| Authors: | Tatiana K PineginaJoanne Bourgeois Lilia I BazanovaIvan V Melekestsev Olga A Braitseva |
| |
| Institution: | a Institute of Volcanic Geology and Geochemistry, Far-East Division, Russian Academy of Sciences, Petropavlovsk-Kamchatskiy, 683006 Russia
b Department of Earth and Space Sciences 351310, University of Washington, Seattle, WA 98195-1310, USA |
| |
| Abstract: | Deposits from as many as 50 large tsunamis during the last 7000 years are preserved on the Pacific coast of the Kamchatka Peninsula near the mouth of the Zhupanova River, southern Kronotskiy Bay. These deposits are dated and correlated using Holocene marker tephra layers. The combined, preserved record of tsunami deposits and of numerous marker tephras on Kamchatka offers an unprecedented opportunity to study tsunami frequency. For example, from the stratigraphy along southern Kronotskiy Bay, we estimate frequency of large tsunamis (>5 m runup). In the last 3000 years, the minimum frequency is about one large tsunami per 100 years, and the maximum about one large tsunami per 30 years; the latter frequency occurred from about 0 to 1000 A.D. This time interval corresponds to a period of increased seismicity and volcanic activity that appears to be recorded in many places on the Kamchatka Peninsula. |
| |
| Keywords: | Kamchatka Russia Tsunami Paleotsunami Paleoseismology Tephrostratigraphy Holocene coastal stratigraphy Subduction zone seismology |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
