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Seismic Alert System

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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
...Gerardo Suárez; J. M. Espinosa‐Aranda; Armando Cuéllar; Gerardo Ibarrola; Armando García; Martín Zavala; Samuel Maldonado; Roberto Islas ABSTRACT The Mexican Seismic Alert System (SASMEX) initiated operations in 1993. It was the first to broadcast seismic early warnings to the general population...
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Development of Earthquake Event Detection Technique Based on STA/LTA Algorithm for Seismic Alert System

Satish Kumar, Renu Vig, Pawan Kapur
Published: 01 December 2018
Jour. Geol. Soc. India (2018) 92 (6): 679–686.
DOI: https://doi.org/10.1007/s12594-018-1087-3
... for vital installations i.e. Seismic alert system (SAS). It is a solution to avert colossal loss as earthquake forecasting is not yet possible and is being devised for regional notification for a possible mitigation while it is in active mode. For designing SAS, a network of seismic sensing node (SSN...
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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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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
... years after the tragic earthquake of 1985 ( Espinosa-Aranda et al. 1995 ). Where the SAS early warnings were received, people successfully responded and evacuated the schools—proof that the system worked ( Goltz and Flores 1997 ). At present the SAS disseminates public seismic alert notices...
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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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Distribution of Mexican <span class="search-highlight">Seismic</span> <span class="search-highlight">Alert</span> <span class="search-highlight">System</span> (SASMEX) strong‐motion station...

Distribution of Mexican Seismic Alert System (SASMEX) strong‐motion station...

Published: 07 February 2018
Figure 1. Distribution of Mexican Seismic Alert System (SASMEX) strong‐motion stations. The first stations installed in 1991 on the Guerrero gap are shown as red triangles; the Oaxaca early warning network, Sistema de Alerta Sísmica de Oaxaca (SASO; blue triangles); the stations added during
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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
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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 Mexico (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 Mexico.

▴ The Seismic Alert System of Mexico.

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

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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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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Communication links showing the topology of the network linking the FS stat...

Communication links showing the topology of the network linking the FS stat...

Published: 07 February 2018
Figure 4. Communication links showing the topology of the network linking the FS stations (solid circles) to the repeaters (triangles) and on the control and emission centers (EASAS [acronym in Spanish of Alternate Emission Stations of the Seismic Alert System]) (large gray circles) installed
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Technical architecture of Résif‐SI. A‐nodes collect and validate the raw da...

Technical architecture of Résif‐SI. A‐nodes collect and validate the raw da...

Published: 07 April 2021
Figure 4. Technical architecture of Résif‐SI. A‐nodes collect and validate the raw data, manage real‐time data flow, edit the metadata, and submit them to the B‐node Résif‐DC. Résif‐DC concentrates the real‐time data flow, which is used by the national seismic alert system operated
Journal Article

Performance of a Hybrid Demonstration Earthquake Early Warning System in the Sichuan–Yunnan Border Region

Chaoyong Peng, Qiang Ma, Peng Jiang, Wenhui Huang, Dake Yang, Hanshu Peng, Liang Chen, Jiansi Yang
Published: 29 January 2020
Seismological Research Letters (2020) 91 (2A): 835–846.
DOI: https://doi.org/10.1785/0220190101
... Seismic Alert System (SASMEX): Its alert signals, broadcast results and performance during the M 7.4 Punta Maldonado earthquake of March 20 th , 2012 , in Early Warning for Geological Disasters , Wenzel F. , and Zschau J. (Editors), Springer , Berlin, Germany , 71 – 87 . Cuéllar...
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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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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
...‐based algorithms, reducing area that receives no warning near the source that generally have the highest ground motions. PLUM is a simple, independent seismic method that may complement existing source‐based algorithms in EEW systems, including the ShakeAlert system, even when alerting to light ( I MMI...
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Earthquake Early Warning ShakeAlert System: Testing and Certification Platform

Elizabeth S. Cochran, Monica D. Kohler, Douglas D. Given, Stephen Guiwits, Jennifer Andrews, Men‐Andrin Meier, Mohammad Ahmad, Ivan Henson, Renate Hartog, Deborah Smith
Published: 06 December 2017
Seismological Research Letters (2018) 89 (1): 108–117.
DOI: https://doi.org/10.1785/0220170138
.... First, point‐source assessments are undertaken to compare magnitude, epicentral location, and origin time with the Advanced National Seismic System Comprehensive Catalog, as well as to evaluate alert latency. Second, we describe assessment of the quality of ground‐motion predictions at end‐user sites...
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Advanced National <span class="search-highlight">Seismic</span> <span class="search-highlight">System</span> (ANSS) <span class="search-highlight">seismic</span> network stations in the wes...

Advanced National Seismic System (ANSS) seismic network stations in the wes...

Published: 06 December 2017
Figure 1. Advanced National Seismic System (ANSS) seismic network stations in the western United States, making up the three Tier 1 regional seismic network centers in California and Washington that operate ShakeAlert and send alerts and data streams. Dashed orange lines show the boundaries