Patterns of significant seismic quiescence on the Mexican Pacific coast

Muñoz-Diosdado, Alejandro; Rudolf-Navarro, Adolfo; Angulo‐Brown, F.; Barrera-Ferrer, Amilcar

doi:10.1016/j.pce.2015.03.009

Cited by 4 publications

(3 citation statements)

References 18 publications

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“…The analysis of the temporal series of earthquakes that occurred between January 1990 and September 2017, in the Tehuantepec region, considering a range of threshold magnitudes

for the application of the algorithm, shows a pattern of significant seismic stillness that begins in the year 2008 and ends at the end of 2015, a temporary interval of approximately seven years (alpha stage), which ends with the resumption of seismic activity in the region, activity superior to the average historical activity of the last three decades (beta stage) that lasts until the occurrence of the main event of magnitude

. This pattern of seismic stillness is similar to those reported by [ 14 ] for earthquakes occurring in the Mexican subduction zone of the Pacific with

. Finally, we remark that the two methods used in our study identified significant patterns from spatio-temporal information of earthquake activity for approximately the same period before the main shock, and additional studies are needed in this direction.…”

Section: Discussionsupporting

confidence: 89%

“…However, the great earthquake of 7 September 2017 helps to better understand the dynamics of the subduction process [ 16 , 17 ]. Motivated by this event, we decided to investigate if this great earthquake had some particular statistical features and precursor quietude patterns similar to those we have reported previously [ 14 ]. We report that the spatio-temporal organization represented by the pseudo-velocities exhibits changes in the multifractality with a narrower and asymmetric spectrum for the years 2013 until almost the end of 2016.…”

Section: Introductionmentioning

confidence: 90%

“…Probably the seismic quiescence is the most reported seismicity pattern, prior to the occurrence of a large earthquake [ 11 , 12 ]. The Mexican coast of the Pacific is not the exception; for the last five decades, four earthquakes of magnitude

have been preceded by important patterns of seismic quiescence [ 13 , 14 ]. As we said, on 7 September 2017, a great earthquake of

occurred at Tehuantepec Isthmus in Mexico.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multifractality of Pseudo-Velocities and Seismic Quiescence Associated with the Tehuantepec M8.2 EQ

Carrizales-Velazquez

Rudolf-Navarro

Reyes-Ramírez

et al. 2018

Entropy

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By using earthquake catalogs, previous studies have reported evidence that some changes in the spatial and temporal organization of earthquake activity are observed before and after of a main shock. These previous studies have used different approaches for detecting clustering behavior and distance-events density in order to point out the asymmetric behavior of foreshocks and aftershocks. Here, we present a statistical analysis of the seismic activity related to the M w = 8.2 earthquake that occurred on 7 September 2017 in Mexico. First, we calculated the inter-event time and distance between successive events for the period 1 January 1998 until 20 October 2017 in a circular region centered at the epicenter of the M w = 8.2 EQ. Next, we introduced the concept of pseudo-velocity as the ratio between the inter-event distance and inter-event time. A sliding window is considered to estimate some statistical features of the pseudo-velocity sequence before the main shock. Specifically, we applied the multifractal method to detect changes in the spectrum of singularities for the period before the main event on 7 September. Our results point out that the multifractality associated with the pseudo-velocities exhibits noticeable changes in the characteristics of the spectra (more narrower) for approximately three years, from 2013 until 2016, which is preceded and followed by periods with wider spectra. On the other hand, we present an analysis of patterns of seismic quiescence before the M w = 8.2 earthquake based on the Schreider algorithm over a period of 27 years. We report the existence of an important period of seismic quietude, for six to seven years, from 2008 to 2015 approximately, known as the alpha stage, and a beta stage of resumption of seismic activity, with a duration of approximately three years until the occurrence of the great earthquake of magnitude M w = 8.2 . Our results are in general concordance with previous results reported for statistics based on magnitude temporal sequences.

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“…The analysis of the temporal series of earthquakes that occurred between January 1990 and September 2017, in the Tehuantepec region, considering a range of threshold magnitudes

. This pattern of seismic stillness is similar to those reported by [ 14 ] for earthquakes occurring in the Mexican subduction zone of the Pacific with

Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 90%