Bizarre Waveforms in Strong Motion Records

Table 1

Records with ratio of PGA to adjacent points greater than 1.1 in Chi-Chi earthquake.

(a)

Serial number	Filename	PGA (cm/s^2)	Time (s)	LPGA (cm/s^2)	Left rate	RPGA (cm/s^2)	Right rate
1	CHY028_E.SAC	−626.71	37.92	−615.82	1.02	−507.73	1.23
2	CHY028.E.SAC	−36.89	25.83	−33.06	1.12	−28.76	1.28
3	TCU088.E.SAC	60.29	12.24	57.00	1.06	50.60	1.19
4	CHY082.Z.SAC	30.79	22.18	30.73	1.00	27.92	1.10
5	TCU056.Z.SAC	25.60	27.12	22.61	1.13	24.64	1.04
6	TCU071.Z.SAC	−140.09	26.41	−127.23	1.10	−138.71	1.01
7	TCU078.Z.SAC	219.87	24.85	214.85	1.02	183.26	1.20
8	TCU079.Z.SAC	160.21	25.31	127.91	1.25	156.20	1.03
9	CHY028_N.SAC	−748.58	36.19	−745.89	1.00	−615.31	1.22
10	KAU022_N.SAC	59.23	53.70	13.23	4.48	13.23	4.48
11	TCU045_N.SAC	511.68	44.86	462.57	1.11	438.28	1.17
12	TCU071_N.SAC	−638.90	32.01	−550.32	1.16	−637.53	1.00
13	CHY028.N.SAC	43.29	25.80	40.12	1.08	37.37	1.16
14	TCU048.N.SAC	−30.71	21.19	−27.90	1.10	−28.08	1.09
15	TCU088.N.SAC	53.73	12.28	42.42	1.27	43.86	1.23
16	TCU067.E.SAC	−164.30	32.61	−142.52	1.15	−163.46	1.01
17	TCU079.E.SAC	−330.53	26.58	−215.92	1.53	−325.56	1.02
18	CHY028_Z.SAC	335.49	35.26	274.42	1.22	293.62	1.14
19	CHY032_Z.SAC	−61.78	39.62	−61.66	1.00	−56.09	1.10
20	CHY036_Z.SAC	104.33	30.29	93.39	1.12	98.41	1.06
21	CHY041_Z.SAC	−122.85	39.18	−111.06	1.11	−119.80	1.03
22	CHY082_Z.SAC	−78.37	41.04	−69.45	1.13	−77.11	1.02
23	HWA007_Z.SAC	−30.00	27.12	−26.35	1.14	−29.58	1.01
24	HWA032_Z.SAC	−87.36	39.32	−76.06	1.15	−85.98	1.02

(b)

Serial number	Filename	PGA (cm/s^2)	Time (s)	LPGA (cm/s^2)	Left rate	RPGA (cm/s^2)	Right rate
25	TAP042_Z.SAC	−24.15	53.71	−9.26	2.61	−8.42	2.87
26	TCU039_Z.SAC	121.91	44.81	119.52	1.02	109.47	1.11
27	TCU045_Z.SAC	−353.17	44.82	−324.69	1.09	−292.03	1.21
28	TCU074_Z.SAC	270.16	37.64	245.45	1.10	255.86	1.06
29	TCU076_Z.SAC	−275.44	28.24	−272.27	1.01	−237.88	1.16
30	TCU078_Z.SAC	170.98	27.34	163.62	1.05	154.05	1.11
31	TCU089_Z.SAC	190.13	41.01	159.14	1.19	183.37	1.04
32	TCU103_Z.SAC	142.29	33.93	128.89	1.10	129.91	1.10
33	TCU109_Z.SAC	−133.03	28.17	−129.62	1.03	−119.46	1.11
34	TCU112_Z.SAC	−65.26	40.32	−58.02	1.12	−65.20	1.00
35	TCU118_Z.SAC	98.79	42.15	97.89	1.01	87.48	1.13
36	TCU122_Z.SAC	236.03	33.58	213.77	1.10	218.38	1.08
37	HWA032.Z.SAC	23.67	21.50	20.92	1.13	22.00	1.08
38	TCU051.Z.SAC	−30.08	21.11	−29.72	1.01	−27.09	1.11
39	TCU055.Z.SAC	−50.62	6.07	−49.84	1.02	−45.47	1.11
40	TCU071.Z.SAC	26.11	22.51	23.54	1.11	26.05	1.00
41	TCU076.Z.SAC	−35.93	13.73	−32.10	1.12	−33.66	1.07
42	TCU079.Z.SAC	−260.84	14.39	−254.38	1.03	−225.01	1.16
43	TCU106.Z.SAC	−26.92	13.65	−22.61	1.19	−25.36	1.06
44	TCU117.Z.SAC	−20.52	11.33	−18.61	1.10	−19.68	1.04
45	TCU118.Z.SAC	−20.02	34.33	−19.96	1.00	−17.45	1.15
46	CHY027.Z.SAC	23.86	21.42	20.99	1.14	21.95	1.09
47	CHY032.Z.SAC	−30.16	22.00	−25.38	1.19	−27.47	1.10