From earthquake swarm to a mainshock-aftershocks: the 2018 activity in West Bohemia/Vogtland

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F21%3A00536049" target="_blank" >RIV/67985530:_____/21:00536049 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/21:10427176

Výsledek na webu

<a href="https://academic.oup.com/gji/article/224/3/1835/5955445" target="_blank" >https://academic.oup.com/gji/article/224/3/1835/5955445</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/gji/ggaa523" target="_blank" >10.1093/gji/ggaa523</a>

Jazyk výsledku

angličtina

Název v původním jazyce

From earthquake swarm to a mainshock-aftershocks: the 2018 activity in West Bohemia/Vogtland

Popis výsledku v původním jazyce

In earthquake swarms, seismic energy is released gradually by many earthquakes without a dominant event, which offers detailed insight into the processes on activated faults. The swarm of May 2018 that occurred in West Bohemia/Vogtland region included more than 4000 earthquakes with ML =(0.5, 3.8&x3009 x232A, and its character showed significant changes during the two weeks duration: what started as a pure earthquake swarm ended as a typical main shock-aftershock sequence. Based on precise double-difference relocations, four fault segments differing in strikes and dips were identified with similar dimensions. First, two segments of typical earthquake swarm character took place, and at the end a fault segment hosting a main shock-aftershock sequence was activated. The differences were observable in the earthquakes spatio-temporal evolutions (systematic versus disordered migration of the hypocentres), b-values (>1.3 for the swarm, <1 for the main shock-aftershocks), or the smoothness of seismic moment spatial distribution along the fault plane. Our findings can be interpreted by local variations of fault rheology, differential stress and/or smoothness of the faults surface, possibly related to the crustal fluids circulating along the fault plane and their interplay with the seismic cycle.

Název v anglickém jazyce

From earthquake swarm to a mainshock-aftershocks: the 2018 activity in West Bohemia/Vogtland

Popis výsledku anglicky

In earthquake swarms, seismic energy is released gradually by many earthquakes without a dominant event, which offers detailed insight into the processes on activated faults. The swarm of May 2018 that occurred in West Bohemia/Vogtland region included more than 4000 earthquakes with ML =(0.5, 3.8&x3009 x232A, and its character showed significant changes during the two weeks duration: what started as a pure earthquake swarm ended as a typical main shock-aftershock sequence. Based on precise double-difference relocations, four fault segments differing in strikes and dips were identified with similar dimensions. First, two segments of typical earthquake swarm character took place, and at the end a fault segment hosting a main shock-aftershock sequence was activated. The differences were observable in the earthquakes spatio-temporal evolutions (systematic versus disordered migration of the hypocentres), b-values (>1.3 for the swarm, <1 for the main shock-aftershocks), or the smoothness of seismic moment spatial distribution along the fault plane. Our findings can be interpreted by local variations of fault rheology, differential stress and/or smoothness of the faults surface, possibly related to the crustal fluids circulating along the fault plane and their interplay with the seismic cycle.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10507 - Volcanology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Geophysical Journal International

ISSN

0956-540X

e-ISSN

1365-246X

Svazek periodika

224

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

1835-1848

Kód UT WoS článku

000606573600022

EID výsledku v databázi Scopus

2-s2.0-85099632278