Extreme Accelerations During Earthquakes Caused by Elastic Flapping Effect.

ABSTRACT: Accurate recording of large, earthquake-induced ground shaking is critical for our understanding of earthquake physics as well as seismic hazard assessment. Extremely large accelerations with the peak value of 3.2 times the gravity acceleration were recorded at seismic station WTMC located in northern South Island of New Zealand during the recent magnitude 7.8 Kaikoura earthquake. However, the mechanisms responsible for the generation of such large accelerations are not well understood. Here we use numerical simulations to examine a range of physical models that can reproduce the observed characteristics of the acceleration record. We find that the record of the asymmetric, vertical accelerations, also observed during a magnitude 6.3 earthquake, can be explained by a flapping effect, that

SUBMITTER: Goto H 

PROVIDER: S-EPMC6361895 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature