1972 earthquake

• Need to have a map showing the 1951 earthquake sequences and the 1972 earthquake sequences, and the potential location of the 1972 surface rupture

Mainshock magnitude

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Aftershocks

Relocated mainshock and aftershocks From 蔣(1984)

Source	緯度(N)	經度(E)	深度(km)	規模	Type
NEIC	23.6	121.60	33	7.2	Ms
ISCGEM	23.564	121.539	22.2	7.0	Mw

地震編號	緯度(N)	經度(E)	深度(km)	規模(mb)	年	月	日	時	分	秒
A	23.59	121.54	29.3	6.1	72	4	24	17	57	22.06
B	23.48	121.39	39.7	5.2	72	4	24	19	32	12.65
C	23.52	121.4	52.5	5.1	72	4	24	20	0	34.81
D	23.62	121.49	32.7	4.8	72	4	24	20	22	43.58
E	23.57	121.41	8.6		72	4	24	20	45	41.19
F	23.71	121.66	42.8		72	4	25	1	30	35.69
G	23.78	121.58	26	5.4	72	4	25	1	58	31.91
H	23.88	121.5	42.7	4.7	72	4	25	3	30	29.68
I	23.92	121.36	11.6		72	4	25	3	44	5.12
J	23.94	121.34	16.2	4.3	72	4	25	3	59	49.68
K	23.75	121.74	16.4		72	4	25	4	34	18.8
L	23.58	121.61	48.4	4.7	72	4	25	7	27	57.24
M	23.85	121.31	28.5	4.6	72	4	27	7	48	28.18
N	23.8	121.56	27.1		72	4	27	22	26	28.38
O	23.9	121.55	33.7	4.8	72	5	2	4	1	21.3
P	23.68	121.08	16.4		72	5	6	16	59	21.34
Q	23.86	121.26	26.1		72	5	25	2	38	48.12
R	23.61	121.7	3	4.5	72	8	1	1	4	44
S	23.9	121.6	36	5.5	72	11	8	22	25	46.5
T	23.95	121.28	22	5.9	72	11	10	2	41	14.5
U	23.87	121.66	27	5.5	72	11	21	10	47	16.4

From 詹(1985)

地震編號	緯度(N)	經度(E)	深度(km)	規模(Mcw)	年	月	日	時	分	秒
A	23.51	121.53	15.42	6.38	72	4	24	17	57	22.01
B	23.52	121.31	1.82	5.51	72	4	24	19	32	11.37
C	23.49	121.25	5.83	4.92	72	4	24	20	0	32.77
D	23.6	121.57	22.05	4.68	72	4	24	20	22	42.35
E	23.62	121.34	3.12	4.24	72	4	24	20	45	42.56
F	23.71	121.55	23.94	4.47	72	4	25	1	30	34.48
G	23.69	121.62	26.12	5.47	72	4	25	1	58	31.55
H	23.65	121.62	25.69	4.4	72	4	25	3	30	24.59
I	23.65	121.58	0.51	4.01	72	4	25	3	44	2.81
J	23.75	121.5	22	4.29	72	4	25	3	59	48.78
K	23.74	121.46	17.26	4.26	72	4	25	4	34	19.88
L	23.58	121.5	21.97	4.37	72	4	25	7	27	55.94
M	23.76	121.29	0.85	4.84	72	4	27	7	48	25.57
N	23.78	121.56	0.98	4.26	72	4	27	22	26	26.51
O	23.78	121.57	0.69	5.16	72	5	2	4	1	18.32
P	23.62	121.32	8.37	4.24	72	5	6	16	59	16.93
Q	23.76	121.37	9.96	4.25	72	5	25	2	38	46.12

Ground deformations

• Mostly associated to the landslides and the slope failures.
• A more-than-2-km-long fissure is interesting.
• No clear evidence of surface rupture at the base of the coastal range.