THE IMPACT OF SEISMIC COUNTERMESURES ON THE RECOVERY PROCESS OF THE PRODUCTION CAPACITY —A CASE STUDY OF THE 2022 FUKUSHIMA OFFSHORE EARTHQUAKE—

Abstract

 This study investigated the impact of seismic countermeasures on the recovery process of production capacity using the business survey data following the 2022 Fukushima offshore earthquake. Firstly, the survey data were classified into two groups, the countermeasure group and the non-countermeasure group. Secondly, a dataset was created using propensity score matching to adjust for covariates. Finally, the effectiveness of seismic countermeasure implementation was verified based on the difference between the recovery curves with and without countermeasures. The results showed that countermeasures mainly aimed at early recovery, such as the formulation of a disaster response manual, BCP and securing emergency power supplies or fuel, reduced the expected number of recovery days until full recovery by 1 to 47%. The results quantitatively demonstrate a decrease in the expected number of recovery days until full recovery through the implementation of earthquake countermeasures, and are expected to be applied to the effective seismic risk management.