Electronic Supplement to
Estimation of Source Parameters of Local Earthquakes Originated in Shillong-Mikir Plateau and Its Adjoining Region of Northeastern India

by Dipok K. Bora, Saurabh Baruah, Rajib Biswas, and Naba Kumar Gogoi

Table S2. List of the values of source parameters from the Madariaga 1976 model.

ID	Date (dd/mm/yy)	OT (hh/mm/ss)	Lat (ON)	Lon (OE)	Mag (MDA)	Depth (km)	<fc> (Hz)	<Mo> (Nm)	<R> (m)	<σ> (Pa)	<D> (m)	Mw	ML#	ML†
1	01 01 2008	190054.44	25.460	93.068	3.1	18.4	12.2	3.19E+13	157.38	2E+06	8.00×10−3	2.94	3.09	2.69
2	01 04 2003	145031.86	25.650	91.490	3.8	41.9	11.7	3.63E+14	205.30	2E+07	8.47×10−2	3.64	3.82	3.56
3	01 06 2003	125730.53	25.830	90.752	3.2	12.2	16.4	2.62E+14	116.66	7E+07	1.89×10−1	3.55	3.24	3.44
4	01 10 2003	212510.72	25.903	90.693	3.2	11.8	16.6	5.15E+13	115.61	7E+06	1.89×10−2	3.08	3.21	2.86
5	01 12 2002	172824.67	27.330	91.370	3.6	19.4	13.7	4.87E+14	140.45	1E+07	6.44×10−2	3.73	3.47	3.66
6	01 12 2002	175833.57	26.340	92.490	3.5	24.2	10.3	2.65E+14	201.05	8E+07	2.43×10−1	3.55	3.59	3.45
7	01 12 2004	112859.21	26.027	92.646	3.1	16.2	14.6	3.14E+14	131.42	6E+07	1.79×10−1	3.60	3.11	3.51
8	02 03 2003	230310.54	25.670	91.815	3.4	10.6	12.7	1.06E+14	151.41	1E+07	4.56×10−2	3.29	3.36	3.12
9	02 06 2003	151400.83	27.317	91.750	3.6	5.4	10.9	8.23E+14	175.50	7E+07	2.63×10−1	3.88	3.59	3.85
10	02 10 2003	173738.95	25.650	90.370	3.3	24.4	10.7	4.43E+13	193.37	3E+06	1.16×10−2	3.03	3.29	2.81
11	02 11 2004	082325.49	26.517	92.220	4.0	25.0	11.0	2.13E+15	187.35	1E+08	5.97×10−1	4.16	3.97	4.19
12	03 01 2003	134334.03	26.556	92.784	2.6	16.1	15.5	1.75E+13	123.95	2E+06	7.00×10−3	2.77	2.68	2.48
13	03 01 2003	075601.72	25.737	90.985	3.2	8.3	10.5	4.71E+13	182.55	4E+06	1.12×10−2	3.05	3.18	2.83
14	04 01 2003	193941.25	25.914	92.658	3.7	35.9	14.4	6.17E+14	144.02	9E+07	2.93×10−1	3.80	3.64	3.75
15	04 06 2003	232801.20	26.498	92.308	3.5	11.0	11.1	2.56E+14	172.82	2E+07	8.44×10−2	3.54	3.70*	3.43
16	04 12 2004	145259.54	26.097	91.663	3.3	25.5	12.9	2.48E+14	161.12	3E+07	9.38×10−2	3.53	3.30	3.42
17	05 01 2003	181840.85	26.500	90.160	3.7	22.4	14.4	6.09E+13	133.33	1E+07	3.37×10−2	3.13	2.75	2.92
18	05 01 2003	133501.50	25.760	92.913	2.7	15.1	12.7	2.49E+14	150.94	3E+07	1.07×10−1	3.53	3.64	3.42
19	05 01 2004	200344.19	26.510	92.840	3.4	10.2	14.7	3.62E+14	141.66	6E+07	1.77×10−1	3.64	3.37	3.56
20	05 01 2005	105627.48	25.620	91.671	3.5	8.5	11.5	4.45E+14	167.25	4E+07	1.56×10−1	3.70	3.51	3.63
21	05 12 2004	175102.25	26.030	92.990	3.2	14.3	15.6	6.22E+13	122.92	7E+06	2.03×10−2	3.13	3.22	2.93
22	06 02 2005	164902.99	26.354	91.957	3.4	26.5	10.8	7.75E+13	193.19	5E+06	2.04×10−2	3.20	3.20*	3.01
23	06 04 2003	140721.96	27.448	93.124	3.6	12.1	11.1	6.78E+14	197.37	4E+07	1.71×10−1	3.82	3.59	3.78
24	06 11 2001	195842.26	27.300	92.170	3.2	24.5	12.7	2.12E+14	172.89	2E+07	6.97×10−2	3.49	3.16	3.37
25	07 01 2003	020425.19	25.740	90.810	3.3	12.9	16.1	2.94E+14	118.83	8E+07	2.04×10−1	3.58	3.30	3.48
26	07 05 2003	184911.08	25.257	91.932	3.6	8.4	14.5	1.59E+14	132.01	3E+07	8.96×10−2	3.40	3.54	3.26
27	07 06 2003	222728.39	25.491	91.888	3.3	42.2	15.0	1.69E+14	156.59	2E+07	6.75×10−2	3.42	3.29	3.28
28	07 11 2001	062157.12	27.319	92.061	3.3	10.6	16.0	1.32E+14	120.00	3E+07	9.03×10−2	3.35	3.30	3.20
29	07 12 2002	183744.26	27.223	92.145	3.5	18.4	14.2	2.29E+14	154.03	3E+07	9.47×10−2	3.51	3.47	3.39
30	08 03 2003	165535.10	27.068	92.448	3.4	14.2	12.6	1.33E+14	152.26	2E+07	5.63×10−2	3.35	3.40	3.20
31	08 03 2003	171509.30	27.065	92.444	3.5	15.8	12.3	3.46E+14	177.37	3E+07	1.08×10−1	3.63	3.50	3.54
32	08 05 2003	162051.99	26.262	92.787	3.4	43.5	13.3	1.80E+14	185.54	1E+07	5.14×10−2	3.63	3.40	3.54
33	08 09 2002	204945.44	26.240	92.072	2.8	19.7	12.5	9.8E+12	154.09	1E+06	4.10×10−3	2.60	2.62	2.27
34	08 09 2002	161523.66	27.132	92.193	2.6	19.3	11.2	6.16E+13	170.82	5E+06	2.08×10−2	3.13	2.87	2.93
35	08 11 2003	105803.52	25.837	91.155	2.8	14.8	12.4	7.01E+13	154.46	8E+06	2.89×10−2	3.17	2.83	2.97
36	09 06 2003	175803.79	26.000	90.730	3.5	11.1	13.0	6.39E+13	147.45	9E+06	2.89×10−2	3.14	3.47	2.94
37	09 09 2002	220827.37	26.298	92.697	2.8	17.5	13.6	7.04E+13	141.07	1E+07	3.48×10−2	3.17	2.83	2.97
38	10 12 2001	230457.11	26.662	92.303	2.8	23.6	16.3	6.21E+13	134.36	1E+07	3.38×10−2	3.13	2.78	2.93
39	11 01 2002	145108.59	27.450	92.062	3.8	28.4	10.0	2.19E+15	218.88	9E+07	4.49×10−1	4.16	4.00*	4.20
40	11 02 2005	081309.94	26.526	92.404	3.8	8.3	11.2	1.05E+15	171.74	9E+07	3.49×10−1	3.95	3.78	3.94
41	11 05 2003	220850.23	26.000	90.780	3.4	9.1	15.4	4.48E+13	122.02	1E+07	2.96×10−2	3.04	3.37	2.81
42	11 12 2001	232501.10	26.500	92.381	2.9	29.9	13.9	2.65E+13	158.04	3E+06	1.04×10−2	2.89	2.92	2.63
43	12 04 2003	131025.96	26.330	90.743	3.4	18.3	13.9	5.87E+13	133.53	1E+07	3.24×10−2	3.12	3.35	2.91
44	12 11 2002	183858.94	26.350	93.260	3.2	10.5	13.2	4.79E+13	145.68	4E+06	1.31×10−2	3.06	3.22	2.81
45	13 01 2004	231655.87	27.373	92.127	3.5	16.8	10.3	5.68E+14	187.13	4E+07	1.59×10−1	3.77	3.51	3.72
46	13 11 2004	053250.60	26.484	92.712	3.0	10.4	14.0	1.49E+14	137.14	3E+07	7.80×10−2	3.39	3.06	3.24
47	13 12 2001	133923.44	26.600	93.050	2.9	37.1	15.1	1.08E+14	145.24	2E+07	5.02×10−2	3.29	2.93	3.12
48	14 02 2005	020721.35	25.890	90.890	3.3	28.3	13.4	2.82E+14	154.75	3E+07	1.16×10−1	3.57	3.80*	3.47
49	14 03 2007	010946.77	27.235	91.543	4.3	7.1	8.6	2.74E+15	224.04	1E+08	5.37×10−1	4.23	4.00*	4.28
50	14 05 2003	045148.78	25.520	90.810	2.9	20.9	16.0	1.08E+14	129.80	2E+07	6.31×10−2	3.29	2.95	3.13
51	14 07 2003	225122.35	25.595	91.545	3.1	13.6	15.5	3.64E+13	121.16	9E+06	2.44×10−2	2.98	3.15	2.74
52	14 07 2003	090836.25	26.489	92.408	3.7	33.3	11.0	5.40E+14	214.21	2E+07	1.16×10−1	3.76	3.71	3.70
53	14 12 2001	082153.11	26.457	92.790	2.7	42.0	16.1	7.30E+13	152.66	2E+06	9.40×10−3	3.18	2.77	2.99
54	14 12 2001	214905.13	26.320	92.930	2.8	33.8	12.3	3.04E+13	178.39	9E+06	3.08×10−2	2.93	2.80	2.67
55	15 02 2003	213735.93	25.850	90.450	3.9	36.6	13.3	3.04E+14	156.39	3E+07	1.22×10−1	3.59	3.40*	3.49
56	15 05 2006	202544.10	25.955	93.262	3.3	34.5	12.0	1.82E+14	194.67	1E+07	4.71×10−2	3.44	3.29	3.31
57	15 12 2002	112619.30	25.609	91.454	3.0	44.1	12.0	1.09E+14	195.73	6E+06	2.81×10−2	3.30	3.04	3.13
58	16 11 2002	223918.14	25.790	90.760	3.5	10.2	13.8	3.79E+14	135.95	7E+07	2.01×10−1	3.66	3.46	3.57
59	16 11 2003	185952.69	26.335	92.391	3.3	6.8	12.9	4.39E+14	149.30	6E+07	1.94×10−1	3.70	3.31	3.62
60	16 11 2004	230515.45	26.214	92.145	3.3	19.5	11.0	2.63E+14	175.18	2E+07	8.42×10−2	3.55	3.30	3.44
61	16 12 2002	015739.35	26.740	92.690	3.3	33.3	12.5	4.62E+14	197.28	3E+07	1.17×10−1	3.71	3.30	3.64
62	17 03 2003	150200.50	26.560	90.540	3.7	37.2	14.7	3.17E+14	159.78	3E+07	1.22×10−1	3.60	3.66	3.51
63	17 04 2003	192338.99	26.299	92.832	3.5	20.5	12.6	2.31E+14	164.08	1E+07	5.37×10−2	3.51	3.50	3.40
64	17 11 2002	173509.21	25.660	91.520	3.5	9.0	14.6	2.26E+14	128.97	5E+07	1.34×10−1	3.51	3.50	3.39
65	17 12 2003	142139.79	26.245	92.845	3.3	9.1	13.0	2.64E+14	147.47	2E+07	6.28×10−2	3.55	3.33	3.44
66	18 01 2001	024747.62	26.321	93.201	3.2	42.1	10.6	1.99E+14	231.80	7E+06	3.64×10−2	3.47	3.60*	3.34
67	18 02 2003	223715.38	27.123	91.408	3.3	9.1	15.5	3.85E+13	123.74	9E+06	2.47×10−2	2.99	3.26	2.76
68	18 10 2002	231446.99	26.830	92.620	2.8	10.1	16.5	6.49E+13	116.43	2E+07	4.70×10−2	3.14	2.80	2.94
69	18 11 2001	193725.25	26.287	92.358	3.1	24.8	14.3	4.75E+13	171.95	4E+06	1.58×10−2	3.05	2.83	2.83
70	18 11 2001	223246.85	26.118	93.207	2.8	37.8	10.7	2.11E+14	190.69	1E+07	5.70×10−2	3.49	3.15	3.36
71	18 12 2003	205026.87	26.082	92.844	3.3	24.1	14.1	1.23E+14	155.68	1E+07	5.00×10−2	3.33	3.32	3.17
72	19 11 2003	212648.68	26.154	92.190	3.6	9.9	14.0	3.34E+14	136.52	6E+07	1.76×10−1	3.62	3.56	3.53
73	19 12 2003	220844.75	25.690	90.870	3.5	23.0	13.0	2.22E+14	168.37	2E+07	7.70×10−2	3.50	3.53	3.38
74	20 01 2005	021607.50	25.689	90.742	3.4	8.1	14.5	1.08E+14	129.59	2E+07	6.30×10−2	3.29	3.60*	3.12
75	20 03 2001	161513.56	27.133	92.164	3.7	10.1	10.8	6.05E+14	177.78	5E+07	1.88×10−1	3.79	3.70	3.74
76	20 11 2001	213503.41	26.817	93.186	2.7	21.9	10.0	1.58E+13	218.88	7E+05	3.20×10−3	2.74	2.71	2.44
77	21 01 2005	203323.94	27.408	92.678	3.3	7.7	15.3	8.15E+13	125.12	1E+07	3.51×10−2	3.21	3.32	3.03
78	21 01 2005	235406.53	26.196	90.962	3.3	11.5	14.5	6.22E+13	132.01	2E+07	5.12×10−2	3.13	3.34	2.93
79	21 01 2005	135017.51	27.446	92.620	3.6	16.0	12.2	2.41E+14	156.99	3E+07	9.62×10−2	3.53	3.62	3.41
80	21 01 2008	105520.76	25.579	93.065	2.9	13.1	14.2	8.40E+13	135.40	1E+07	4.50×10−2	3.22	2.93	3.04
81	21 06 2003	210551.37	26.030	90.590	3.5	7.4	13.3	2.58E+14	141.79	4E+07	1.26×10−1	3.54	3.51	3.44
82	21 09 2002	190812.15	26.141	92.600	3.2	21.1	14.0	2.00E+14	147.62	3E+07	9.02×10−2	3.47	3.23	3.35
83	21 11 2003	195625.11	25.670	91.000	3.3	30.8	15.3	2.56E+14	135.56	5E+07	1.37×10−1	3.54	3.29	3.43
84	22 01 2008	221252.89	26.183	92.675	3.2	27.6	11.8	1.68E+14	185.65	1E+07	4.79×10−2	3.42	3.16	3.28
85	22 03 2007	140246.45	27.230	92.166	4.0	6.4	9.2	1.54E+15	209.38	7E+07	3.45×10−1	4.06	3.98	4.07
86	23 02 2005	224455.19	26.645	92.424	3.7	28.9	11.8	5.69E+14	185.49	4E+07	1.63×10−1	3.77	3.68	3.72
87	23 04 2003	230600.48	26.160	90.860	3.4	15.0	16.0	1.80E+14	117.75	5E+07	1.27×10−1	3.44	3.41	3.31
88	23 10 2003	185737.35	25.549	90.774	2.6	6.5	15.3	1.56E+13	122.74	2E+06	6.60×10−3	2.73	2.68	2.44
89	23 10 2003	184113.37	25.750	90.190	2.7	3.9	13.6	1.27E+13	137.95	4E+06	1.02×10−2	2.67	2.73	2.36
90	24 03 2007	215542.32	27.090	91.831	3.4	22.5	13.9	6.39E+14	148.79	9E+07	2.84×10−1	3.81	3.43	3.76
91	24 07 2003	123915.52	26.220	92.657	3.5	25.1	13.0	3.18E+14	158.52	4E+07	1.25×10−1	3.61	3.45	3.51
92	24 08 2003	172046.13	26.154	92.781	3.2	19.2	12.2	1.58E+14	156.86	2E+07	6.31×10−2	3.40	3.17	3.26
93	24 09 2002	234203.51	25.926	90.387	3.7	19.6	13.4	3.94E+14	154.87	5E+07	1.62×10−1	3.67	3.68	3.59
94	24 10 2003	233704.25	25.744	90.651	3.2	27.9	12.0	2.53E+14	173.07	2E+07	8.30×10−2	3.54	3.25	3.43
95	25 02 2005	070705.33	26.510	92.732	3.5	32.9	13.9	6.05E+14	157.92	7E+07	2.38×10−1	3.79	3.52	3.74
96	25 06 2003	212340.59	25.710	91.020	3.5	31.9	11.3	3.02E+14	183.14	2E+07	8.86×10−2	3.59	3.46	3.49
97	26 07 2003	170355.41	27.027	92.197	3.7	22.4	9.7	4.44E+14	213.11	2E+07	9.61×10−2	3.70	3.65	3.63
98	26 09 2002	184959.75	26.437	91.965	3.1	16.4	12.3	1.25E+14	156.47	1E+07	5.01×10−2	3.33	3.10	3.18
99	26 10 2002	113648.27	26.645	92.372	3.4	21.0	12.5	2.70E+14	175.24	2E+07	8.64×10−2	3.56	3.37	3.45
100	26 10 2003	204550.31	25.538	90.104	2.9	21.0	11.0	7.92E+13	189.66	5E+06	2.16×10−2	3.20	2.93	3.02
101	26 12 2003	200822.49	27.380	92.020	3.3	19.0	15.2	9.06E+13	144.48	1E+07	4.27×10−2	3.24	3.27	3.06
102	27 01 2003	172321.72	25.967	92.867	3.0	4.9	13.3	6.22E+13	144.80	5E+06	1.71×10−2	3.13	3.01	2.93
103	27 10 2002	202717.99	26.409	93.135	3.3	37.6	14.1	2.97E+14	174.26	2E+07	9.62×10−2	3.59	3.26	3.49
104	27 10 2003	192457.18	25.600	90.580	2.6	6.3	10.8	2.41E+13	174.87	2E+06	7.70×10−3	2.86	2.59	2.59
105	27 11 2001	080607.68	26.629	92.183	2.7	33.6	10.0	2.99E+13	218.88	1E+06	6.10×10−3	2.92	2.69	2.67
106	28 02 2003	191727.09	26.621	92.668	2.8	8.5	13.9	7.18E+13	138.30	1E+07	3.69×10−2	3.17	2.80	2.98
107	28 06 2003	133126.75	27.275	92.155	3.8	15.3	11.7	1.12E+15	175.84	9E+07	3.56×10−1	3.97	3.78	3.96
108	28 10 2003	165842.86	25.660	90.480	2.8	23.9	16.0	1.57E+13	130.04	3E+06	9.10×10−3	2.73	2.86	2.60
109	28 10 2003	233813.42	26.157	90.195	2.9	23.4	16.0	8.94E+13	130.04	1E+07	3.84×10−2	3.24	2.94	3.06
110	28 10 2003	073319.74	26.367	90.308	3.5	24.8	14.5	9.73E+13	151.37	2E+07	5.65×10−2	3.26	3.45	3.09
111	28 11 2005	040448.25	25.788	92.829	2.9	12.1	12.0	8.01E+13	160.54	9E+06	3.06×10−2	3.21	2.96	3.02
112	29 05 2003	020353.04	27.160	92.823	3.7	10.6	14.4	1.99E+14	132.93	4E+07	1.11×10−1	3.47	3.64	3.34
113	29 09 2003	184516.66	25.594	90.349	3.0	9.7	15.0	9.51E+12	125.61	900796	3.40×10−3	2.59	2.59	2.26
114	29 09 2003	211538.06	25.100	90.330	2.6	29.4	13.0	1.03E+14	166.87	2E+07	6.44×10−2	3.28	2.98	3.11
115	29 10 2003	165238.55	25.725	90.531	2.7	24.9	14.5	1.98E+13	143.62	3E+06	9.40×10−3	2.80	2.74	2.52
116	29 11 2001	154722.26	26.427	93.167	2.7	35.8	16.3	3.79E+13	144.10	6E+06	1.80×10−2	2.99	2.73	2.75
117	29 11 2003	183445.25	25.792	92.957	4.0	17.7	13.6	3.35E+15	140.84	5E+07	1.66×10−1	3.62	3.96	3.53
118	29 12 2003	23851.13	25.736	90.854	3.5	10.2	12.5	1.19E+14	150.65	2E+07	5.15×10−2	3.32	3.47	3.16
119	30 05 2003	224227.22	25.880	90.710	3.4	9.0	13.8	7.48E+13	136.15	1E+07	3.97×10−2	3.19	3.39	3.00
120	31 01 2005	201947.81	26.735	91.998	3.5	44.3	12.0	4.48E+14	205.33	2E+07	1.05×10−1	3.70	3.50	3.63

ID is the identification of the event; <MO> is the average seismic moment; <R> is the average source radius; <Δσ> is the average stress drop;

<D> is the average source displacement.

MDA is the average duration magnitude;

MW is the moment magnitude estimated from Hanks and Kanamori relation (1979);

ML# is the local magnitude estimated from the relation Sitaram and Bora (2007);

ML† is the local magnitude estimated from the regression relation

* is the ML estimated from IMD, Shillong station.

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