Preprints
https://doi.org/10.5194/essd-2022-326
https://doi.org/10.5194/essd-2022-326
 
02 Jan 2023
02 Jan 2023
Status: this preprint is currently under review for the journal ESSD.

An earthquake focal mechanism catalog for source and tectonic studies in Mexico from February 1928 to July 2022

Quetzalcoatl Rodríguez-Pérez1 and F. Ramón Zúñiga2 Quetzalcoatl Rodríguez-Pérez and F. Ramón Zúñiga
  • 1Dirección de Desarrollo Científico, Consejo Nacional de Ciencia y Tecnología, Mexico City, Mexico
  • 2Centro de Geociencias, Universidad Nacional Autónoma de México, Juriquilla, Querétaro, Mexico

Abstract. We present a focal mechanism catalog for earthquakes that occurred in Mexico and surrounding areas reported from February 1928 to July 2022. The magnitude of the events varies from -0.9 to 8.2. The hypocentral depth is in the range of 0 < Z < 270 km. Focal mechanisms in this catalog are associated with tectonic, geothermal, and volcanic environments. Reported fault plane solutions were derived using different types of data at local, regional, and teleseismic distances and different methods such as first motions, composite solutions, waveform analysis, and moment tensor inversion. So far, focal mechanism data for earthquakes in Mexico, were dispersed over many publications without any link among them. For this reason, we collected and revised focal mechanism solutions previously reported by different agencies and studies from published sources. Our catalog consists of 5701 fault plane solutions, and we report all the available focal mechanisms obtained by different authors and seismological agencies for each seismic event. Additionally, we classified the fault type into seven types: normal (N), normal – strike-slip (N-SS), strike-slip – normal (SS-N), strike-slip (SS), strike-slip – reverse (SS-R), reverse – strike-slip (R-SS), and reverse (R) providing some preliminary statistics results. We used the ternary diagrams of Kaverina-type classification to verify the rupture type of focal mechanism data. We also provide a classification of the quality of the focal mechanism data into three categories: A, B, and C. A represents good/reliable data, B represents regular, and C represents poor/questionable data according to a well-defined criterion. Our intention is to provide a comprehensive compilation of focal mechanism data which can help in future source and tectonic studies in Mexico. 

The earthquake focal mechanism catalog (https://figshare.com/articles/dataset/Earthquake_focal_mechanism_catalog_for_Mexico/21663668; Rodríguez-Pérez and Zúñiga, 2022) is given as the Supplement of this paper.

Quetzalcoatl Rodríguez-Pérez and F. Ramón Zúñiga

Status: open (until 27 Feb 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Quetzalcoatl Rodríguez-Pérez and F. Ramón Zúñiga

Data sets

Earthquake focal mechanism catalog for Mexico Rodríguez-Pérez Quetzalcoatl and Zúñiga F. Ramón https://doi.org/10.6084/m9.figshare.21663668.v1

Quetzalcoatl Rodríguez-Pérez and F. Ramón Zúñiga

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Short summary
We present a focal mechanism catalog for earthquakes that occurred in Mexico. Reported fault plane solutions were derived using different types of data at local, regional, and teleseismic distances and different methods such as first motions, composite solutions, waveform analysis, and moment tensor inversion. Our catalog consists of 5701 fault plane solutions, and we report all the available focal mechanisms obtained by different authors and seismological agencies for each seismic event.