The cause of heavy damage concentration in downtown Mashiki inferred from observed data and field survey of the 2016 Kumamoto earthquake

Earth, Planets and Space

Table 1 Damage ratios calculated from the Yoshida et al.’s model for wooden houses in Japan and the observed strong ground motions at two stations in Mashiki

Event	Site	Component	Maximum Acc (cm/s²)	Damage ratio for construction age category
				–1950	1950–1970	1970–1981	1982–
4/16 01:25 Mainshock	IIS Mashiki	NS	776	0.555	0.481	0.330	0.105
		EW	825	0.711	0.481	0.423	0.154
	KMMH16	NS	651	0.473	0.386	0.332	0.11
		EW	1156	0.637	0.423	0.555	0.144