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6. Response of the Mexican National Seismological Service to Significant Earthquakes, under Normal and COVID-19 Pandemic Circumstances

Author

Pérez-Campos, Xyoli, primary, Espíndola, Víctor H., additional, Pérez, Jesús, additional, Estrada, Jorge A., additional, Monroy, Caridad Cárdenas, additional, Bello, Delia, additional, González-López, Adriana, additional, Ávila, Daniel González, additional, Maldonado, Rafael, additional, Montoya-Quintanar, Edgar, additional, Ramírez Ruiz, Jesús Elihú, additional, Rasilla, Iván Rodríguez, additional, Tan, Yi, additional, Vela Rosas, Miguel Angel, additional, Sosa Jiménez, Miguel Ángel, additional, Cruz, José Luis, additional, Cárdenas, Arturo, additional, Estrada, Fernando Navarro, additional, Hurtado, Alejandro, additional, Carvajal, Antonio de Jesús Mendoza, additional, Fabila, Betty Zanolli, additional, Hurtado Meléndez, Hugo Michel, additional, Valdés-González, Carlos M., additional, Ramirez-Guzman, Leonardo, additional, and Montalvo-Arrieta, Juan Carlos, additional

Published
2020
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8. The effect of confinement due to COVID-19 on seismic noise in Mexico.

Author

Pérez-Campos, Xyoli, Espíndola, Víctor H., González-Ávila, Daniel, Fabila, Betty Zanolli, Márquez-Ramírez, Víctor H., Plaen, Raphael S. M. De, Montalvo-Arrieta, Juan Carlos, and Quintanar, Luis

Subjects
*COVID-19, *COVID-19 pandemic, *NOISE control, *STAY-at-home orders, *SIGNAL processing
Abstract

The world experienced the beginning of the COVID-19 pandemic by the end of 2019, beginning of 2020. Governments implemented strategies to contain it, most based on lockdowns. Mexico was not the exception. The lockdown was initiated in March 2020 and with it, a reduction on the seismic noise level was witnessed by the seismic stations of the national and the Valley of Mexico networks. Stations located in municipalities with more than 50,000 people usually experience larger seismic noise levels at frequencies between 1 to 5 Hz, associated with human activity. The largest noise levels are recorded in Mexico City, with the largest population in the country. The largest drop was observed in Hermosillo, Sonora, however, it was also the city with the fastest return to activities, which seems to correlate with a quick increase in confirmed COVID-19 cases. Mexico initiated a traffic-light system to modulate the re-opening of economic activities for each state. Therefore, since 1 June, noise levels reflect, in general, the colour of the state traffic light. Furthermore, the reduction in the noise level at seismic stations has allowed identification of smaller earthquakes without signal processing. Also, people in cities have perceived smaller or distant quakes. [ABSTRACT FROM AUTHOR]

Published
2020
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