5:15 PM - 6:45 PM
[HDS09-P01] Disaster prevention awareness structure of residents of Suzu City, Ishikawa Prefecture following the 2023 Oku-Noto Earthquake
Keywords:2024 Noto Peninsula Earthquake, 2023 Oku-Noto Earthquake, Questionnaire survey, readiness
Since December 2020, earthquake swarms have occurred on the Noto Peninsula in Ishikawa Prefecture. On May 5, 2023, an M6.5 (maximum seismic intensity 6+) earthquake (Reiwa 5 Oku-Noto Earthquake) occurred, resulting in one death and over 350 partially destroyed homes. With the occurrence of this earthquake, the epicenter area of the earthquake swarm expanded to the north, and the submarine active fault (F43 fault Suzu offshore segment) became included in the epicenter area, so the swarm of earthquakes excites active fault earthquakes. The possibility was pointed out.
In the event of an earthquake caused by the F43 submarine active fault, it was assumed that a large-scale tsunami would reach the Okunoto coast in a short period of time, so the purpose of this project was to confirm the readiness of residents and provide necessary support. A questionnaire survey was conducted among 4,916 households living in 36 villages in the coastal area of Suzu City.
In reality, the 2020 Noto Peninsula Earthquake occurred on January 1, 2024, causing the damage that had been feared during the compilation of the questionnaire survey. In this presentation, we will present the results of a questionnaire primarily used as data to analyze residents' awareness of tsunamis in order to understand the structure of damage caused by the 2020 Noto Peninsula Earthquake.
It was shown that even in areas that were hit by strong shaking due to the 2020 Oku-Noto Earthquake, there was only a "vague" sense of crisis and awareness of the tsunami. For example, about half of the residents could not imagine a tsunami when the Oku-Noto Earthquake occurred, and 20% of the residents did not actively collect information (such as checking on TV to see if there was a tsunami warning). It was over %. In addition, regarding how to respond to a tsunami in the event of an active fault earthquake, about half of the residents were worried about evacuation of their families or themselves, and about 15% of the total gave up on evacuating from the tsunami (unable to escape). ) was confirmed.
In the event of an earthquake caused by the F43 submarine active fault, it was assumed that a large-scale tsunami would reach the Okunoto coast in a short period of time, so the purpose of this project was to confirm the readiness of residents and provide necessary support. A questionnaire survey was conducted among 4,916 households living in 36 villages in the coastal area of Suzu City.
In reality, the 2020 Noto Peninsula Earthquake occurred on January 1, 2024, causing the damage that had been feared during the compilation of the questionnaire survey. In this presentation, we will present the results of a questionnaire primarily used as data to analyze residents' awareness of tsunamis in order to understand the structure of damage caused by the 2020 Noto Peninsula Earthquake.
It was shown that even in areas that were hit by strong shaking due to the 2020 Oku-Noto Earthquake, there was only a "vague" sense of crisis and awareness of the tsunami. For example, about half of the residents could not imagine a tsunami when the Oku-Noto Earthquake occurred, and 20% of the residents did not actively collect information (such as checking on TV to see if there was a tsunami warning). It was over %. In addition, regarding how to respond to a tsunami in the event of an active fault earthquake, about half of the residents were worried about evacuation of their families or themselves, and about 15% of the total gave up on evacuating from the tsunami (unable to escape). ) was confirmed.