Estimation of shallow S-wave velocity structure using microtremor array exploration at temporary strong motion observation stations for aftershocks of the 2016 Kumamoto earthquake

Earth, Planets and Space

Table 1 Sites of microtremor array measurements, size of array and obtained AVS30 values

Region	Site code	Lat. (deg.)	Long. (deg.)	Date in 2016	Array size^a (m)	AVS30 ± SD (m/s)
Aso and Minami-Aso	AS01	32.920410	130.975480	22 May	13–2	495 ± 0.31
	AS02	32.906830	130.993700	22 May	13–2	267 ± 0.69
	AS03	32.884100	130.992940	22 May	12–1.5	254 ± 0.49
	AS04	32.879480	130.964540	22 May	20–2.5	401 ± 0.35
Kumamoto city	KC01	32.781222	130.764500	1 May	30–3	259 ± 0.30
	KC02	32.787970	130.736510	20 May	12–1.5	313 ± 1.61
	KC03	32.763166	130.723796	20 May	20–2.5	194 ± 0.85
	KC04	32.784400	130.706020	20 May	20–2.5	232 ± 0.98
Mashiki	MK01	32.791222	130.816194	21 May	4–2	258 ± 0.63
	MK02	32.796639	130.819806	21 May	20–2.5	248 ± 0.68
	MK03	32.786750	130.809833	1 May	8–1.5	244 ± 1.40
	MK04	32.789056	130.804778	30 April	5–1.5	267 ± 1.37
	MK05	32.792750	130.817639	1 May	9–1.5	241 ± 1.28
	MK06	32.782306	130.841056	21 May	8–1.5	261 ± 0.97
	MK07	32.780250	130.790667	30 April	10–1.5	229 ± 1.30
	MK08	32.786722	130.828361	30 April	7–2	309 ± 0.22
	MK09	32.788194	130.819722	30 April	14–2	252 ± 2.00
	MK10	32.804000	130.815611	30 April	6–1.5	284 ± 1.94
	MK11	32.800833	130.841833	30 April	12–1.5	330 ± 0.98
	MK12	32.784667	130.833667	21 May	20–2.5	335 ± 0.21
	MK13	32.823891	130.842807	21 May	24–3	269 ± 1.04
Nishihara	NH01	32.814820	130.890180	22 May	12–1.5	410 ± 0.11
	NH02	32.829620	130.901050	21 May	20–2.5	339 ± 0.41
	NH03	32.834950	130.903080	22 May	11–1.5	256 ± 0.32
	NH04	32.846089	130.918586	21 May	16–2	270 ± 0.72
	NH05	32.844250	130.928800	21 May	10–1.5	231 ± 1.04