Complex rupture of the M6.3 2015 March 10 Bucaramanga earthquake: Evidence of strong weakening process

P. Poli, G. A. Prieto, C. Q. Yu, M. Florez, H. Agurto-Detzel, T. D. Mikesell, G. Chen, V. Dionicio, P. Pedraza

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

© The Authors 2016.Summary: We use seismic waves for a magnitude 6.3 intermediate-depth (160 km) earthquake in the Bucaramanga Nest, Colombia, to infer a complex rupture process with two distinct stages, characterized by different rupture velocities possibly controlled by the evolution of strength on the fault. Our integrated data processing permitted to precisely characterize the multistage rupture and the presence of a strong weakening event. The resulting seismic radiation is interpreted as resulting from an extreme weakening due to a cascading thermal shear runaway, with an initial inefficient radiation process followed by a fast and dynamic efficient rupture. Our results imply dynamic complexity of the seismic rupture deep inside the Earth, and may help to give some new insights about the physical mechanism of intermediate-depth earthquakes.
Original languageEnglish (US)
Pages (from-to)988-994
Number of pages7
JournalGeophysical Journal International
Volume205
Issue number2
DOIs
StatePublished - May 1 2016

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rupture
Earthquakes
earthquakes
Colombia
Radiation
earthquake
Seismic waves
seismic waves
radiation
Earth (planet)
shear
seismic wave
nest
Hot Temperature

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Poli, P., Prieto, G. A., Yu, C. Q., Florez, M., Agurto-Detzel, H., Mikesell, T. D., ... Pedraza, P. (2016). Complex rupture of the M6.3 2015 March 10 Bucaramanga earthquake: Evidence of strong weakening process. Geophysical Journal International, 205(2), 988-994. https://doi.org/10.1093/gji/ggw065
Poli, P. ; Prieto, G. A. ; Yu, C. Q. ; Florez, M. ; Agurto-Detzel, H. ; Mikesell, T. D. ; Chen, G. ; Dionicio, V. ; Pedraza, P. / Complex rupture of the M6.3 2015 March 10 Bucaramanga earthquake: Evidence of strong weakening process. In: Geophysical Journal International. 2016 ; Vol. 205, No. 2. pp. 988-994.
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Poli, P, Prieto, GA, Yu, CQ, Florez, M, Agurto-Detzel, H, Mikesell, TD, Chen, G, Dionicio, V & Pedraza, P 2016, 'Complex rupture of the M6.3 2015 March 10 Bucaramanga earthquake: Evidence of strong weakening process', Geophysical Journal International, vol. 205, no. 2, pp. 988-994. https://doi.org/10.1093/gji/ggw065

Complex rupture of the M6.3 2015 March 10 Bucaramanga earthquake: Evidence of strong weakening process. / Poli, P.; Prieto, G. A.; Yu, C. Q.; Florez, M.; Agurto-Detzel, H.; Mikesell, T. D.; Chen, G.; Dionicio, V.; Pedraza, P.

In: Geophysical Journal International, Vol. 205, No. 2, 01.05.2016, p. 988-994.

Research output: Contribution to journalArticle

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AU - Poli, P.

AU - Prieto, G. A.

AU - Yu, C. Q.

AU - Florez, M.

AU - Agurto-Detzel, H.

AU - Mikesell, T. D.

AU - Chen, G.

AU - Dionicio, V.

AU - Pedraza, P.

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N2 - © The Authors 2016.Summary: We use seismic waves for a magnitude 6.3 intermediate-depth (160 km) earthquake in the Bucaramanga Nest, Colombia, to infer a complex rupture process with two distinct stages, characterized by different rupture velocities possibly controlled by the evolution of strength on the fault. Our integrated data processing permitted to precisely characterize the multistage rupture and the presence of a strong weakening event. The resulting seismic radiation is interpreted as resulting from an extreme weakening due to a cascading thermal shear runaway, with an initial inefficient radiation process followed by a fast and dynamic efficient rupture. Our results imply dynamic complexity of the seismic rupture deep inside the Earth, and may help to give some new insights about the physical mechanism of intermediate-depth earthquakes.

AB - © The Authors 2016.Summary: We use seismic waves for a magnitude 6.3 intermediate-depth (160 km) earthquake in the Bucaramanga Nest, Colombia, to infer a complex rupture process with two distinct stages, characterized by different rupture velocities possibly controlled by the evolution of strength on the fault. Our integrated data processing permitted to precisely characterize the multistage rupture and the presence of a strong weakening event. The resulting seismic radiation is interpreted as resulting from an extreme weakening due to a cascading thermal shear runaway, with an initial inefficient radiation process followed by a fast and dynamic efficient rupture. Our results imply dynamic complexity of the seismic rupture deep inside the Earth, and may help to give some new insights about the physical mechanism of intermediate-depth earthquakes.

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