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Seismic Alert System of Mexico

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Journal Article

Performance Evaluation of the Earthquake Detection and Classification Algorithm 2 ( t S – t P ) of the Seismic Alert System of Mexico (SASMEX)

Armando Cuéllar, Gerardo Suárez, J. M. Espinosa‐Aranda
Published: 07 March 2017
Bulletin of the Seismological Society of America (2017) 107 (3): 1451–1463.
DOI: https://doi.org/10.1785/0120150330
...Armando Cuéllar; Gerardo Suárez; J. M. Espinosa‐Aranda Abstract A performance evaluation of the detection and classification algorithm for earthquake early warning 2 ( t S – t P ) was conducted to test its reliability and robustness. The Seismic Alert System of Mexico (SASMEX) has used...
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Performance Evaluation of the Seismic Alert System (SAS) in Mexico City: A Seismological and a Social Perspective

Gerardo Suárez, David Novelo, Elizabeth Mansilla
Published: 01 September 2009
Seismological Research Letters (2009) 80 (5): 707–716.
DOI: https://doi.org/10.1785/gssrl.80.5.707
...Gerardo Suárez; David Novelo; Elizabeth Mansilla © 2009 by the Seismological Society of America 2009 Mexico City's Seismic Alert System—Sistema de Alerta Sísmica, in Spanish (SAS)—was conceived after the disastrous Michoacán earthquake of 19 September 1985, which severely damaged...
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The Seismic Alert System for Mexico City: An Evaluation of Its Performance and a Strategy for Its Improvement

A. Iglesias, S. K. Singh, M. Ordaz, M. A. Santoyo, J. Pacheco
Published: 01 October 2007
Bulletin of the Seismological Society of America (2007) 97 (5): 1718–1729.
DOI: https://doi.org/10.1785/0120050202
...A. Iglesias; S. K. Singh; M. Ordaz; M. A. Santoyo; J. Pacheco Abstract The seismic alert system ( sas ) for Mexico City has now been in operation for about 15 years. The sas takes advantage of the fact that the city is located more than 300 km from the foci of many of the potentially damaging...
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Mexico City Seismic Alert System

J. M. Espinosa Aranda, A. Jiménez, G. Ibarrola, F. Alcantar, A. Aguilar, M. Inostroza, S. Maldonado
Published: 01 November 1995
Seismological Research Letters (1995) 66 (6): 42–53.
DOI: https://doi.org/10.1785/gssrl.66.6.42
...J. M. Espinosa Aranda; A. Jiménez; G. Ibarrola; F. Alcantar; A. Aguilar; M. Inostroza; S. Maldonado © 1995 by the Seismological Society of America 1995 INTRODUCTION The Seismic Alert System (SAS) for Mexico City has been operating as an experimental evaluation project since August...
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Current distribution of <span class="search-highlight">Seismic</span> <span class="search-highlight">Alert</span> <span class="search-highlight">System</span> of <span class="search-highlight">Mexico</span> (SASMEX) strong‐moti...

Current distribution of Seismic Alert System of Mexico (SASMEX) strong‐moti...

Published: 07 March 2017
Figure 1. Current distribution of Seismic Alert System of Mexico (SASMEX) strong‐motion stations (triangles) and alternate emitters of seismic warnings designed to disseminate the alert in various Mexican cities (squares).
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▴ The <span class="search-highlight">Seismic</span> <span class="search-highlight">Alert</span> <span class="search-highlight">System</span> of <span class="search-highlight">Mexico</span>.

▴ The Seismic Alert System of Mexico.

Published: 01 September 2009
Figure 3. ▴ The Seismic Alert System of Mexico.
Journal Article

A Dedicated Seismic Early Warning Network: The Mexican Seismic Alert System (SASMEX)

Gerardo Suárez, J. M. Espinosa‐Aranda, Armando Cuéllar, Gerardo Ibarrola, Armando García, Martín Zavala, Samuel Maldonado, Roberto Islas
Published: 07 February 2018
Seismological Research Letters (2018) 89 (2A): 382–391.
DOI: https://doi.org/10.1785/0220170184
..., and, in Mexico City, by the system of municipal loudspeakers installed in the streets throughout the city. From 1993 to 2017, the network has recorded 6896 earthquakes and has issued 158 seismic early warnings. The more recent examples of successful seismic alerts are the two earthquakes that occurred in Mexico...
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A Fast Earthquake Early Warning Algorithm Based on the First 3 s of the P ‐Wave Coda

Armando Cuéllar, Gerardo Suárez, J. M. Espinosa‐Aranda
Published: 10 July 2018
Bulletin of the Seismological Society of America (2018) 108 (4): 2068–2079.
DOI: https://doi.org/10.1785/0120180079
... algorithms used by the Mexican seismic early warning system (Seismic Alert System of Mexico [SASMEX]). It was designed to alert earthquakes within the subducted Cocos plate. The t P + 3 algorithm was based on a training dataset of 76 accelerograms of 25 Mexican in‐slab earthquakes, with focal depths > 40...
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Current distribution of Mexican <span class="search-highlight">Seismic</span> <span class="search-highlight">Alert</span> <span class="search-highlight">System</span> (SASMEX) strong‐motion...

Current distribution of Mexican Seismic Alert System (SASMEX) strong‐motion...

Published: 19 December 2017
Figure 1. Current distribution of Mexican Seismic Alert System (SASMEX) strong‐motion stations (triangles) and cities where the seismic early warning system is now operational (white circles). G, Guadalajara; M, Morelia; Mx, Mexico City; Ch, Chilpancingo; A, Acapulco; O, Oaxaca; RP, Rivera plate
Journal Article

An automated local and regional seismic event detection and location system using waveform correlation

Mitchell Withers, Richard Aster, Christopher Young
Published: 01 June 1999
Bulletin of the Seismological Society of America (1999) 89 (3): 657–669.
DOI: https://doi.org/10.1785/BSSA0890030657
...Mitchell Withers; Richard Aster; Christopher Young Abstract We report on the development of an automated Local Waveform Correlation Event Detection System ( LWCEDS ) and its application to the New Mexico Tech Seismic Network. LWCEDS is an adaptation of a global system, WCEDS, a matched filtering...
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Near-Trench Mexican Earthquakes Have Anomalously Low Peak Accelerations

A. Iglesias, S. K. Singh, J. F. Pacheco, L. Alcántara, M. Ortiz, M. Ordaz
Published: 01 April 2003
Bulletin of the Seismological Society of America (2003) 93 (2): 953–959.
DOI: https://doi.org/10.1785/0120020168
... proposed for detecting potentially tsunamigenic earthquakes and issuing tsunami alerts. It is reasonable to expect relatively low peak accelerations during these earthquakes. In this note, we present evidence that this is indeed the case. This explains why the seismic alert system for Mexico City...
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Scaling of Peak Ground Displacement with Seismic Moment above the Mexican Subduction Thrust

Shri Krishna Singh, Xyoli Pérez‐Campos, Mario Ordaz, Arturo Iglesias, Vladimir Kostoglodov
Published: 08 January 2020
Seismological Research Letters (2020) 91 (2A): 956–966.
DOI: https://doi.org/10.1785/0220190155
... as well as for rapid estimation of magnitude for early tsunami alert. Figure 1. Tectonic setting of Mexico showing coastal broadband, accelerographic, and Global Positioning System (GPS) stations whose recordings are used in this study. Aftershock areas of large earthquakes ( M w ≥ 6.9...
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Status and Performance of the ShakeAlert Earthquake Early Warning System: 2019–2023

Angela I. Lux, Deborah Smith, Maren Böse, Jeffrey J. McGuire, Jessie K. Saunders, Minh Huynh, Igor Stubailo, Jennifer Andrews, Gabriel Lotto, Brendan Crowell, Stephen Crane, Richard M. Allen, Douglas Given, Renate Hartog, Thomas Heaton, Allen Husker, Julien Marty, Leland O’Driscoll, Harold Tobin, Sara K. McBride, Douglas Toomey
Published: 16 August 2024
Bulletin of the Seismological Society of America (2024) 114 (6): 3041–3062.
DOI: https://doi.org/10.1785/0120230259
... and public confidence in the system ( Kohler et al. , 2018 , 2020 ). To successfully deliver alerts to the public in California, Oregon, and Washington, the network of seismic stations used by the system in each state must be dense enough for the system to rapidly detect all significant earthquakes...
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Evolution of the Mexican Seismic Alert System (SASMEX)

J. M. Espinosa-Aranda, A. Cuellar, A. Garcia, G. Ibarrola, R. Islas, S. Maldonado, F. H. Rodriguez
Published: 01 September 2009
Seismological Research Letters (2009) 80 (5): 694–706.
DOI: https://doi.org/10.1785/gssrl.80.5.694
...Figure 3. ▴ The Seismic Alert System of Mexico. ...
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An Earthquake Early Warning Algorithm Based on the P ‐Wave Energy Released in the t S – t P Interval

Armando Cuéllar, Gerardo Suárez, J. M. Espinosa‐Aranda
Published: 19 December 2017
Bulletin of the Seismological Society of America (2018) 108 (1): 238–247.
DOI: https://doi.org/10.1785/0120170115
...Figure 1. Current distribution of Mexican Seismic Alert System (SASMEX) strong‐motion stations (triangles) and cities where the seismic early warning system is now operational (white circles). G, Guadalajara; M, Morelia; Mx, Mexico City; Ch, Chilpancingo; A, Acapulco; O, Oaxaca; RP, Rivera plate...
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A Report on the Atoyac, Mexico, Earthquake of 13 April 2007 (M w 5.9)

S. K. Singh, M. Ordaz, J. F. Pacheco, L. Alcántara, A. Iglesias, S. Alcocer, D. García, X. Pérez-Campos, C. Valdes, D. Almora, L. A. Aguilar, M. Ambriz, J. G. Anderson, M. Ayala, C. Cárdenas, G. Castro, J. L. Cruz, R. Delgado, L. Domínguez, J. Estrada, S. I. Franco, L. E. Flores, C. Gutierrez, M. A. Macías, I. Molina, C. Morquecho, J. Ortíz, M. A. Pacheco-Martínez, A. Quezada, R. Quaas, L. Quintanar, C. Pérez, J. Perez, A. L. Ruiz, H. Sandoval, M. Torres, R. Vázquez, J. M. Velasco, J. Velázquez, M. Velázquez
Published: 01 November 2007
Seismological Research Letters (2007) 78 (6): 635–648.
DOI: https://doi.org/10.1785/gssrl.78.6.635
... report on the source characteristics and the tectonic implications of the earthquake and the ground motions that it produced. We also discuss the performance of the seismic alert system (SAS) and near real-time generation and distribution of expected ground-motion maps for Mexico City during...
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Benefits and Costs of Earthquake Early Warning

Jennifer A. Strauss, Richard M. Allen
Published: 23 March 2016
Seismological Research Letters (2016) 87 (3): 765–772.
DOI: https://doi.org/10.1785/0220150149
...Jennifer A. Strauss; Richard M. Allen ABSTRACT Earthquake early warning ( EEW ) is the rapid detection of earthquakes underway and the alerting of people and infrastructure in harms way. Public warning systems are now operational in Mexico and Japan, and smaller‐scale systems deliver alerts...
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The Status of Earthquake Early Warning around the World: An Introductory Overview

Richard M. Allen, Paolo Gasparini, Osamu Kamigaichi, Maren Böse
Published: 01 September 2009
Seismological Research Letters (2009) 80 (5): 682–693.
DOI: https://doi.org/10.1785/gssrl.80.5.682
... in one location and providing warning to another. When the only seismic sources are some distance from a populated area, front detection can provide significant warning times, i.e. , tens of seconds. The Seismic Alert System (SAS) for Mexico City uses front detection. Instruments along the coast...
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“Shaking in 5 Seconds!”—Performance and User Appreciation Assessment of the Earthquake Network Smartphone‐Based Public Earthquake Early Warning System

Rémy Bossu, Francesco Finazzi, Robert Steed, Laure Fallou, István Bondár
Published: 29 September 2021
Seismological Research Letters (2022) 93 (1): 137–148.
DOI: https://doi.org/10.1785/0220210180
... D. , and Mansilla F. E. 2009 . Performance evaluation of the seismic alert system (SAS) in Mexico City: A seismological and a social perspective , Seismol. Res. Lett. 80 , 707 – 716 . Tosi P. Sbarra P. De Rubeis V. , and Ferrari C. 2015 . Macroseismic intensity...
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Event Detection Performance of the PLUM Earthquake Early Warning Algorithm in Southern California

Elizabeth S. Cochran, Julian Bunn, Sarah E. Minson, Annemarie S. Baltay, Deborah L. Kilb, Yuki Kodera, Mitsuyuki Hoshiba
Published: 18 June 2019
Bulletin of the Seismological Society of America (2019) 109 (4): 1524–1541.
DOI: https://doi.org/10.1785/0120180326
.... Maldonado S. , and Rodriguez F. H. 2009 . Evolution of the Mexican seismic alert system (SASMEX) , Seismol. Res. Lett. 80 , no.  5 , 694 – 706 . Espinosa Aranda J. M Jiménez A. G. Ibarrola Alcantar F. Aguilar A. Inostroza M. , and Maldonado S. 1995 . Mexico City...
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