Electronic Supplement to
Performance Evaluation of the Earthquake Detection and Classification Algorithm 2(tS–tP) of the Seismic Alert System of Mexico (SASMEX)

by Armando Cuéllar, Gerardo Suárez, and J. M. Espinosa-Aranda

Table S2. Performance Tests Using SASMEX Stations with S–P Times of Less Than 10 s

SASMEX Parameters from the SSN Catalog Data from the CMT Catalog Results Obtained from the 2(tS–tP) Algorithm Mw and mb vs. Estimated m2(tS–tP)
No. Type of Warning Local Date (yyyy/mm/dd) Local Time (hh:mm:ss.s) Latitude (°) Longitude (°) Depth (km) mb mpre* Latitude (°) Longitude (°) Depth (km) Mw mb Range FS Name tS–tP (s) Parameter a Parameter m m2(tS–tP) Range Magnitude Error ±0.5 Magnitude Error ±1.0
92 Preventive 2014/05/24 03:24:45.0 16.2 98.42 18 5.7 16.5 −98.25 14.1 5.7 >5.5 OX04 6.64 6.08 1.77 >6.0 OK OK
>5.5 OX05 9.82 4.7 0.96 <5.0 OK
91 Public 2014/05/10 02:36:01.0 17.2 100.95 12 6.1 17.3 −100.7 20.9 6.1 >6.0 GR02 3.04 6.8 3.28 >6.0 OK OK
>6.0 GR01 4.03 6.78 3.33 >6.0 OK OK
>6.0 GR03 4.2 6.02 2.62 >6.0 OK OK
>6.0 GR13 6.98 5.48 1.21 <5.0
>6.0 GR04 7.04 5.56 1.72 >5.5 OK OK
90 Public 2014/05/08 00:00:16.0 17.1 100.87 17 6.4 17.3 −100.7 23.2 6.5 >6.0 GR02 2.78 6.89 4.35 >6.0 OK OK
>6.0 GR01 4.38 6.96 3.47 >6.0 OK OK
89 Public 2014/04/18 09:27:23.0 17.2 101.19 10 7.2 17.5 −124 21..0 7.2 >6.0 GR01 2.5 8.17 5.96 >6.0 OK OK
>6.0 GR13 5.47 7.52 4.54 >6.0 OK OK
>6.0 GR02 6.01 7.25 3.76 >6.0 OK OK
>6.0 GR03 8.75 6.84 3.76 >6.0 OK OK
>6.0 GR14 9.08 7.38 3.52 >6.0 OK OK
88 Preventive 2013/10/06 10:10:56.0 16.8 100.11 10 5 17.1 −99.97 20.6 5.1 >5.0 GR06 3.29 6.32 2.50 >6.0 OK
>5.0 GR05 3.8 5.6 2.02 >6.0 OK
>5.0 GR04 5.69 5.02 1.14 <5.0 OK OK
86 Public 2013/08/21 07:38:30 16.79 −99.56 20 6.0 16.97 −99.50 24.4 6.2 >6.0 GR08 2.82 6.79 4.28 >6.0 OK OK
>6.0 GR06 6.86 6.59 2.54 >6.0 OK OK
>6.0 GR31 7.92 4.89 0.88 <5.0
>6.0 GR32 9.52 5.52 2.53 >6.0 OK OK
84 Preventive 2013/08/16 10:32:59 16.54 −98.59 20 5.1 16.8 −98.4 27.0 5.3 >5.5 GR11 3.81 6.08 2.31 >6.0 OK OK
>5.5 GR32 4.47 6.11 2.41 >6.0 OK OK
>5.5 OX02 4.78 5.58 2.02 >6.0 OK OK
>5.5 GR10 6.06 4.93 1.21 <5.0 OK
>5.5 GR31 8.34 5.25 1.23 <5.0 OK
>5.5 GR09 8.43 5.09 1.16 <5.0 OK
83 Public 2013/06/16 00:19:03 18.04 −99.25 60 5.8 18.25 −99.18 49.6 5.9 >5.5 GR25 6.1 6.98 3.27 >6.0 OK OK
>5.5 GR24 6.82 7.01 3.01 >6.0 OK OK
>5.5 GR27 7.45 6.24 1.70 >6.0 OK OK
>5.5 GR26 8.83 5.41 1.40 <5.0 OK
81 Public 2013/04/21 20:16:34 17.87 −102.19 10 5.8 18.05 −102.19 26.6 6.1 >5.5 GR02 4.95 7.68 3.01 >6.0 OK OK
>5.5 GR01 5.63 6.45 2.38 >6.0 OK OK
>5.5 GR17 6.55 6.96 2.61 >6.0 OK OK
>5.5 GR16 7.65 5.66 1.56 >5.0 OK OK
>5.5 GR15 8.45 5.58 1.77 >5.5 OK OK
80 Preventive 2013/04/11 22:45:09 17.78 −101.58 35 5.2 17.95 −101.47 35.8 5.3 >5.0 GR16 4.8 6.15 1.82 >6.0 OK
>5.0 GR14 5.29 5.28 1.84 >5.0 OK OK
>5.0 GR17 5.69 6.36 2.17 >6.0 OK
>5.0 GR28 6.24 5.71 2.26 >6.0 OK
>5.0 GR18 6.73 5.42 1.35 <5.0 OK OK
79 Preventive 2013/03/26 07:04:45 15.78 −98.61 10 5.4 16.3 −98.2 12.3 5.4 >5.5 OX01 4.45 6.10 2.76 >6.0 OK OK
76 Public 2012/09/22 07:29:57 16.23 −98.30 2 5.4 16.55 −98.10 19.5 5.5 >5.0 LG01 3.39 6.58 3.66 >6.0 OK
>5.0 MT02 3.65 5.98 2.50 >6.0 OK
>5.0 HZ04 5.11 6.12 2.50 >6.0 OK
>5.0 LA03 5.94 6.20 2.50 >6.0 OK
>5.0 TU05 8.85 5.14 1.06 <5.0 OK OK
75 Preventive 2012/04/13 08:06:28 16.22 −98.15 16 5.0 16.38 −98.17 12.2 5.0 >5.0 LG01 3.6 6.07 3.21 >6.0 OK
>5.0 MT02 5.94 5.16 1.07 <5.0 OK OK
>5.0 HZ04 6.5 5.34 1.43 <5.0 OK OK
>5.0 LA03 7.98 5.27 1.29 <5.0 OK OK
74 Preventive 2012/04/13 05:10:03 16.11 −98.34 14 5.2 16.35 −98.23 13.9 5.3 >5.0 LG01 3.16 6.66 3.30 >6.0 OK
>5.0 MT02 6.07 5.61 1.71 >5.5 OK OK
>5.0 HZ04 6.57 5.64 1.90 >5.5 OK OK
>5.0 LA03 8.47 5.77 1.47 >5.0 OK OK
73 Preventive 2012/04/02 12:36:42 16.27 −98.47 10 6.0 16.58 −98.35 12.0 6.1 >5.5 LA03 7.1 4.26 0.91 <5.0 OK
>5.5 HA04 7.92 6.36 2.59 >6.0 OK OK
72 Preventive 2012/03/20 12:02:47 16.25 −98.52 16 7.4 16.60 −98.39 15.4 7.5 >6.0 LG01 2.84 7.49 5.17 >6.0 OK OK
>6.0 MT02 5.47 8.16 5.20 >6.0 OK OK
>6.0 MQ11 5.6 7.55 4.89 >6.0 OK OK
>6.0 CR10 7.88 7.06 4.01 >6.0 OK OK
>6.0 LA03 7.97 8.33 4.34 >6.0 OK OK
>6.0 HZ04 8.14 7.91 4.36 >6.0 OK OK
68 Preventive 2011/04/26 06:07:28 16.71 −99.69 7 5.5 16.91 −99.45 22.9 5.4 >5.0 CT08 3.04 5.52 2.09 >6.0 OK
67 Preventive 2010/05/25 18:36:15 17.11 −101.20 15 5.0 17.39 −100.96 23.6 5.1 <5.0 CT08 4.44 7.09 3.56 >6.0
66 Preventive 2009/04/27 11:46:27 16.90 −99.58 7 5.7 17.06 −99.41 32.2 5.8 >5.5 CT08 5.5 6.90 3.00 >6.0 OK OK
65 Preventive 2009/03/27 02:48:16 17.35 −100.82 30 5.3 17.42 −100.60 38.7 5.3 >5.0 VN02 4.47 6.90 2.70 >6.0 OK
>5.0 PN01 5.27 6.39 2.85 >6.0 OK
64 Preventive 2008/11/11 05:02:06 16.62 −100.80 15 4.7 16.94 −99.81 28.0 4.9 <5.0 JD06 3.21 5.77 3.16 >6.0
<5.0 PJ05 3.44 5.31 2.79 >6.0
63 Public 2007/11/06 00:35:42 17.08 −100.14 9 5.6 17.14 −99.91 18.4 5.4 >5.0 PJ05 2.03 8.26 4.91 >6.0 OK
>5.0 JD06 3.98 7.47 3.70 >6.0 OK
62 Preventive 2007/04/28 08:54:35 16.94 −99.82 9 5.0 17.04 −99.64 29.9 5.1 <5.0 JD06 4.3 6.80 2.65 >6.0
61 Public 2007/04/13 00:42:22 17.09 −100.44 41 6.3 17.37 −100.14 42.7 6.0 >5.5 CA04 4.45 8.04 4.01 >6.0 OK OK
>5.5 TT03 5.76 7.20 3.56 >6.0 OK OK
>5.5 PJ05 6.24 7.49 3.41 >6.0 OK OK
>5.5 VN02 7.29 7.05 3.30 >6.0 OK OK
>5.5 JD06 8.71 7.14 2.62 >6.0 OK OK
60 Preventive 2007/04/13 03:43:50 17.27 −100.27 51 5.4 17.40 −100.23 66.8 5.3 >5.5 CA04 4.13 7.14 3.32 >6.0 OK OK
>5.5 PJ05 5.26 6.88 3.00 >6.0 OK OK
>5.5 TT03 6.14 6.16 2.35 >6.0 OK OK
>5.5 JD06 7.3 6.45 2.04 >6.0 OK OK
>5.5 VN02 7.63 6.12 2.09 >6.0 OK OK
59 Preventive 2007/03/31 00:18:56 17.00 −99.79 34 4.7 14.31 −93.32 12.0 5.1 <5.0 PJ05 5.35 5.99 1.75 >6.0
<5.0 CT08 6.46 5.47 1.00 <5.0 OK OK
<5.0 CA04 7.58 5.62 1.46 >5.0 OK OK
57 Preventive 2003/01/09 20:08:42 16.97 −100.30 30 5.1 16.88 −99.85 44.7 5.2 >5.0 CA04 3.8 7.14 3.12 >6.0 OK
>5.0 PJ05 4.65 7.01 3.30 >6.0 OK
>5.0 TT03 5.45 6.25 2.09 >6.0 OK
>5.0 JD06 6.37 6.43 1.82 >6.0 OK
56 Preventive 2002/09/27 02:04:58 17.16 −100.59 36 5.2 17.44 −100.10 36.4 5.1 >5.0 TT03 4.47 6.35 2.84 >6.0 OK
>5.0 CA04 5.19 6.81 2.90 >6.0 OK
>5.0 PJ05 7.4 6.35 2.37 >6.0 OK
55 Preventive 2002/09/25 13:14:48 16.86 −100.12 5 5.2 16.86 −99.79 19.0 5.3 >5.0 JD06 3.13 7.17 3.22 >6.0 OK
>5.0 PJ05 3.35 6.33 2.81 >6.0 OK
>5.0 CA04 5.65 5.63 1.67 >5.5 OK OK
54 Preventive 2002/02/16 22:10:19 16.94 −99.93 37 4.4 <5.0 PJ05 4.53 5.90 2.43 >6.0
<5.0 JD06 4.59 5.96 2.38 >6.0
<5.0 CA04 6.44 5.31 1.27 <5.0 OK OK
53 Public 2001/10/07 21:39:20 16.94 −100.14 4 5.6 >5.5 JD06 2.27 7.03 4.79 >6.0 OK OK
>5.5 CA04 4.11 7.05 4.37 >6.0 OK OK
52 Preventive 2001/03/06 15:57:56 17.14 −100.10 32 5.1 >5.0 PJ05 4.6 6.90 3.23 >6.0 OK
>5.0 CA04 5.45 6.38 2.70 >6.0 OK
>5.0 JD06 5.8 6.63 2.33 >6.0 OK
51 Preventive 2001/03/05 04:17:30 17.13 −100.06 32 5.0 >5.0 PJ05 4.54 6.85 2.79 >6.0 OK
>5.0 CA04 5.29 5.56 1.44 >5.0 OK OK
>5.0 JD06 5.52 6.48 2.38 >6.0 OK
50 Preventive 2000/04/14 20:45:05 16.88 −100.35 9 4.0 <5.0 CA04 3.69 6.25 2.41 >6.0
<5.0 PJ05 4.14 6.23 2.47 >6.0
49 Preventive 2000/03/17 18:50:58 17.08 −99.31 31 4.8 <5.0 CT08 7.27 5.61 1.56 >5.0 OK OK
47 Preventive 1999/05/30 04:58:42 17.26 −100.79 53 4.4 <5.0 VN02 4.98 6.40 2.28 >6.0
<5.0 TT03 5.18 4.62 0.80 <5.0 OK OK
46 Preventive 1999/04/24 22:08:57 17.28 −100.80 27 4.4 <5.0 VN02 4.32 5.99 2.21 >6.0
<5.0 TT03 4.75 4.44 0.30 <5.0 OK OK
<5.0 CA04 7.17 5.15 1.57 <5.0 OK OK
44 Preventive 1998/08/09 11:18:07 16.87 −100.25 3 4.2 <5.0 PJ05 3.34 4.75 0.85 <5.0 OK OK
42 Public 1998/07/05 14:55:07 16.83 −100.12 5 4.9 16.92 −99.73 37.6 5.3 <5.0 PJ05 3.54 5.10 2.14 >5.0 OK OK
41 Preventive 1998/05/09 12:03:13 17.34 −101.41 18 4.8 17.31 −101.00 36.2 5.2 <5.0 PN01 4.47 5.60 2.71 >6.0
39 Public 1997/12/21 23:22:00 17.14 −101.24 5 5.1 >5.0 PN01 2.77 6.64 2.94 >6.0 OK
>5.0 VN02 4.8 5.42 2.19 >6.0 OK
38 Preventive 1997/08/26 19:13:17 16.76 −99.88 28 5.0 >5.0 JD06 3.36 5.15 1.44 <5.0 OK OK
>5.0 PJ05 4.52 4.36 1.41 <5.0 OK OK
37 Preventive 1997/07/19 02:34:37 17.22 −100.56 51 4.6 <5.0 CA04 5.08 5.34 1.01 <5.0 OK OK
<5.0 TT03 5.61 4.62 0.84 <5.0 OK OK
<5.0 VN02 6.05 4.87 0.83 <5.0 OK OK
36 Preventive 1997/07/14 20:26:18 16.39 −98.74 11 4.0 <5.0 MQ11 3.63 4.78 0.78 <5.0 OK OK
33 Preventive 1997/05/08 10:58:30 17.32 −100.44 12 5.0 >5.0 TT03 5.47 4.94 1.11 <5.0 OK OK
>5.0 VN02 6.36 5.13 1.20 <5.0 OK OK
>5.0 PJ05 6.7 5.09 1.23 <5.0 OK OK
32 Preventive 1997/03/23 14:23:16 17.39 −100.88 31 4.9 <5.0 PN01 5.28 5.54 1.39 <5.0 OK OK
<5.0 TT03 5.96 4.38 0.74 <5.0 OK OK
31 Preventive 1997/03/21 21:49:16 17.04 −99.76 30 4.7 <5.0 JD06 5.23 4.81 0.77 <5.0 OK OK
<5.0 PJ05 5.85 4.85 0.81 <5.0 OK OK
28 Preventive 1996/07/19 04:00:54 17.35 −100.29 20 4.8 <5.0 CA04 5.42 5.37 0.97 <5.0 OK OK
<5.0 TT03 6.1 4.49 0.43 <5.0 OK OK
27 Preventive 1996/07/15 16:23:39 17.45 −101.16 20 5.7 17.50 −101.12 22.4 6.6 >5.5 VN02 5.85 5.06 2.32 >5.5 OK OK
>5.5 PJ05 6.41 5.06 1.00 <5.0 OK
24 Public 1995/09/15 21:20:05 16.30 −98.62 10 5.1 >5.0 MQ11 4.43 4.56 0.87 <5.0 OK OK
22 Public 1995/09/14 08:04:35 16.31 −98.88 22 6.4 16.73 −98.54 21.8 7.3 >6.0 MQ11 2.12 6.37 4.43 >6.0 OK OK
>6.0 CR10 3.55 5.14 2.68 >6.0 OK OK
>6.0 VI09 5.69 5.37 3.04 >6.0 OK OK
21 Preventive 1995/05/31 06:49:28 15.97 −98.77 14 4.1 17.3 −100.9 26.2 5.5 >5.0 MQ11 3.63 3.62 0.26 <5.0 OK OK
20 Preventive 1995/04/14 12:01:08 16.44 −99.09 15 4.6 <5.0 CR10 2.24 5.21 1.46 <5.0 OK OK
<5.0 MQ11 3.52 4.17 0.72 <5.0 OK OK
<5.0 VI09 3.74 4.52 2.14 <5.0 OK OK
16 Preventive 1993/09/10 04:50:24 16.57 −98.94 20 4.8 <5.0 CR10 3.41 5.39 1.45 <5.0 OK OK
<5.0 MQ11 4 5.50 1.60 >5.0 OK OK
<5.0 VI09 4.93 5.57 2.07 >6.0
15 Preventive 1993/07/29 14:17:01 17.38 −100.65 43 5.0 >5.0 TT03 4.84 5.02 0.94 <5.0 OK OK
>5.0 CA04 6.41 5.01 0.99 <5.0 OK OK
13 Public 1993/05/14 21:12:00 16.47 −98.72 15 5.9 >5.5 MQ11 3 6.54 2.93 >6.0 OK OK
12 Public 1993/05/14 21:09:39 16.43 −98.74 20 5.8 16.45 −97.92 38.5 6.0 >5.5 MQ11 3.02 6.45 2.86 >6.0 OK OK
11 Preventive 1993/03/31 04:18:15 17.18 −101.02 8 5.3 >5.0 VN02 4.18 5.31 2.13 >5.5 OK OK
8 Preventive 1992/10/30 02:16:00 17.14 −100.80 20.9 4.7 <5.0 VN02 2.92 5.37 1.62 <5.0 OK OK
<5.0 TT03 3.33 4.54 0.95 <5.0 OK OK
7 Preventive 1992/10/16 11:28:00 16.51 −99.17 17.4 4.3 <5.0 CR10 2.75 4.45 1.11 <5.0 OK OK
<5.0 VI09 3.95 5.39 1.91 >5.5 OK
<5.0 CT08 5.99 4.62 0.70 <5.0 OK OK
6 Preventive 1992/08/02 06:54:00 17.13 −100.30 25.3 4.3 <5.0 CA04 3.56 5.23 1.47 <5.0 OK OK
<5.0 PJ05 4.79 4.38 0.84 <5.0 OK OK
<5.0 TT03 5.33 4.15 0.40 <5.0 OK OK

SASMEX, Seismic Alert System of Mexico; SSN, Servicio Sismológico Nacional; CMT, centroid momento tensor; FS, field sensor.

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