COASTAL REVETMENT FAILURE IN HORYU-SHOIN COAST, SUZU CITY INDUCED BY THE 2024 NOTO PENINSULA EARTHQUAKE

Abstract

 In the 2024 Noto Peninsula Earthquake that occurred at 16:10 on January 1, 2024, a seismic intensity of 6+ was observed in Suzu City, Ishikawa Prefecture, and a tsunami struck, causing damage to coastal revetments and flooding in the hinterland of the coast. We conducted a field survey on January 22, 2024 to grasp the damage caused by this earthquake to the Horyu-shoin Coast in Suzu City. The results show that, although the damage caused by the tsunami was less than that in the neighboring area, cracks, shifts, and fractures in the coastal revetment had occurred over a wide area. In addition, the results suggest that the washout of parapets to the sea in the Choku-Shoin and Ueto districts was caused by the strong earthquake motion combined with the effects of the tsunami backflow.