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[P-10] The analysis of location data related to the deceased in the 2011 Tohoku Tsunami: A case study of Miyagi prefecture

*Shuji Seto^1,2, Hirokazu Kamata⁴, Tomoki Serikawa³, Anawat Suppasri^1,2, Fumihiko Imamura^1,2 (1. International Research Institute of Disaster Science, Tohoku University, 2. Core Research Cluster of Disaster Science, Tohoku University, 3. Graduate School of Engineering, Tohoku University, 4. School of Engineering, Tohoku University)

Keywords:2011 Great East Japan Earthquake tsunami, Disaster science, Location of the deceased, Science of human survival from disaster

About 20,000 people died in the Great East Japan Earthquake tsunami that occurred in 2011. According to the National Police Agency (2012), 90% of the deceased in Iwate, Miyagi and Fukushima prefectures were drowned. Aoki et al. (2012) reported the results of questionnaires to physicians who actually examined in the affected areas. The questionnaire result showed that the statistical result about the cause of death reported by National Police Agency was reasonable, and that some physicians could not but describe it as drowning as a realistic problem. This suggests that the deceased in a tsunami disaster may diefromcause of death other than drowning. According to Kahoku Shimpo (2011), the survivors witnessed the deceased who died of symptoms like hypothermia after exposure to the tsunami. However, the details of the cause of death excluding drowning has not been elucidated yet.

Seto and Imamura(2019) classified the causes of death inthe 2011 Great East Japan Earthquake tsunami using data of the deceased provided by Miyagi Prefecture Police. As a result,the cause of death was classified into the following 12 groups; Injuries to the head, Injuries to the neck, Injuries to the thorax, Unspecified multiple injuries, Traumatic shock, Asphyxiation except drowning, Drowning, Death due to fire, Hypothermia, Heart disease, The others death and Death from unknown origin. Furthermore, they showed the proportion of each cause of death in Miyagi prefecture. The proportion in each city are needed to clarify the deceasedin the Great East Japan Earthquake in more detail.

In this study, weanalyzed the location data related to the deceased provided by Miyagi Prefecture Police. The data are resident address, location of the deceased and its type such as on land, at sea and in debris. We showed characteristics of each location data in Miyagi prefecture.