Preliminary analysis of amplified ground motion in Bangkok basin using HVSR curves from recent moderate to large earthquakes

Geoenvironmental Disasters

Table 2 Main ground motion parameters recorded at the seismic stations inside basin (TMDA & TMDB) with those outside basin (PRAC & SRDT)

No	Year	Mw	R_epi Bangkok (km)	TMDA (surface)			TMDB (borehole)			PRAC			SRDT
No	Year	Mw	R_epi Bangkok (km)	PGA (cm/s²)	PGV (cm/s)	D 5–95 (s)	PGA (cm/s²)	PGV (cm/s)	D 5–95 (s)	PGA (cm/s²)	PGV (cm/s)	D 5–95 (s)	PGA (cm/s²)	PGV (cm/s)	D 5–95 (s)
1	2007	6.3	740	0.5	0.3	201	–	–	–	–	–	–	–	–	–
				0.5	0.3	214
				0.3	0.1	232
2	2008	7.9	1900	1.0	0.6	768	0.6	0.5	468	0.2	0.2	197	0.2	0.2	191
				1.0	0.5	828	0.5	0.6	452	0.1	0.1	264	0.1	0.1	290
				0.8	0.2	978	0.2	0.3	682	0.1	0.1	258	0.2	0.1	228
3	2009	7.5	810	1.0	0.6	489	0.5	0.4	383	0.1	0.0	463	–	–	–
				0.9	0.7	487	1.1	0.8	278	0.1	0.1	472
				0.3	0.1	1222	0.2	0.1	671	0.1	0.0	463
4	2011	6.8	770	1.0	0.6	240	–	–	–	0.2	0.2	136	–	–	–
				1.1	0.5	234				0.1	0.1	177
				0.4	0.2	251				0.1	0.1	143
5	2014	6.1	680	0.8	0.1	86	–	–	–	0.1	0.0	140	0.3	0.1	110
				0.9	0.1	101				0.1	0.0	180	0.3	0.1	109
				0.3	0.0	175				0.2	0.0	153	0.2	0.1	100
6	2016	6.8	1000	1.1	0.5	196	–	–	–	0.1	0.0	153	0.2	0.1	104
				0.8	0.3	215				0.1	0.0	164	0.1	0.0	112
				0.4	0.6	250				0.2	0.0	130	0.1	0.0	125

PGA peak ground acceleration, PGV peak ground velocity, and D 5–95 significant duration between 5 and 95% of total energy. For each event, the first, second, and third lines correspond to the north–south, east–west, and up-down components