EGU21-13834
https://doi.org/10.5194/egusphere-egu21-13834
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Nowcasting and multifractal features of the seismicity in the subduction zone of Tehuantepec Isthmus, southern México

Alejandro Ramírez-Rojas1 and Elsa Leticia Flores-Márquez2
Alejandro Ramírez-Rojas and Elsa Leticia Flores-Márquez
  • 1Universidad Autónoma Metropolitana, Ciencias Básicas, México D.F., Mexico (arr@correo.azc.uam.mx)
  • 2Instituto de Geofísica, Universidad Nacional Autónoma de México, México (leticia@igeofisica.unam.mx)

After the M8.2 earthquake occurred on September 07, 2017 at Isthmus of Tehuantepec, notable spatial and temporal changes where
registered, the temporal rate of occurrence increased and the spatial seismicity distribution showed a clear clusterization along
the region of collision of the Tehuantepec Transform/Ridge with the Middle America Trench off Chiapas. Also, the b-value in the
Gutenberg-Richer law showed changes in time. On the basis of that behavior we studied the sequence of magnitudes of the
earthquakes occurred within the Isthmus of Tehuantepec at southern Mexico from 2010 to 2020, by using the nowcasting method
and the multifractal detrended fluctuation analysis. Our findings suggest the b-value could depend on time and after the main-shock
M8.2, the underlying dynamics in the Tehuantepec ridge has been changed, which is clearly described by our analyses based on
nowcasting method and in the multifractality estimated changes.

How to cite: Ramírez-Rojas, A. and Flores-Márquez, E. L.: Nowcasting and multifractal features of the seismicity in the subduction zone of Tehuantepec Isthmus, southern México, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-13834, https://doi.org/10.5194/egusphere-egu21-13834, 2021.

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