Numerical Analyses of 2011 East Japan Tsunami Propagation towards Korean Peninsula

Abstract

The effect of bathymetry near the south sea area of Korea on the propagation of 2011 East Japan Tsunami is analyzed based on the numerical simulation using the finite difference dispersion-correction model. It is found that the bathymetry from the source to Korean Peninsula, such as Nankai Trough, Ryukyu Islands and the topographical lens in the East China Sea, plays an important role to reduce the tsunami height along the south coast of Korea. The mechanism involved in the transformation of tsunamis over those topographies is discussed.

Propagation of a tsunami wave generated by an earthquake in the Nankai Trough onto the South Korean coast

“…Runups with estimated heights of 10-25 m occurred in the Pacific coast areas of the Shikoku region. Recent research by Bae et al (2012) suggests that a branch of the 2011 East Japan tsunami in fact propagated to the southwest and diffracted clockwise toward Korea south of Kyushu. It is reasonable to expect that the hypothetical Nankai Trough earthquake will produce similar patterns.…”

Classification of Tsunami Hazard Area along the Eastern Coast of South Korea based on Improved Tsunami Scenario Database

“…이들 지진해일은 지진 발생 100분 전후에 동해안의 주요 항만권역에 도달하여 피해 를 야기하였다 Lee et al, 2012). 국내 지진해일에 관한 기존 사례에서는 시뮬레이션을 통한 지진해일의 전파해석 (Yoon, 2002;Yang, 2007;Bae et al, 2012), 파고 추정 (Cho, 1998;Choi et al, 2002a;Kim, 2010)에 관한 연구들이 진행되었고, 시뮬레이션 결과를 이용 한 재해정보 산출, 위험지역 예측 등 방재 및 피해 최소화를 위한 연구들도 진행되었다. 일례로 Ahn et al (2010) (Lee et al, 2005;NIMR, 2006).…”

Development of the Global Tsunami Prediction System using the Finite Fault Model and the Cyclic Boundary Condition

“…Statistical parameters of tsunami arrival timeBae et al (2012)에서 사용한 위도 보정 방법 등과 같은 고위도 지역까지 분산 효과가 적절히 고려되는 방법에 대한 연구가 필요하다. 경우 적용할 수 없다(Saito and Furumura, 2009).…”