Stress inversion of regional seismicity in the Sea of Marmara region, Turkey

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F19%3A00494881" target="_blank" >RIV/67985530:_____/19:00494881 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007%2Fs00024-018-1971-1" target="_blank" >https://link.springer.com/article/10.1007%2Fs00024-018-1971-1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00024-018-1971-1" target="_blank" >10.1007/s00024-018-1971-1</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Stress inversion of regional seismicity in the Sea of Marmara region, Turkey

Popis výsledku v původním jazyce

In this study we derive the stress tensor and its local variations throughout the Marmara region, Turkey. Based on a recently compiled 10-year earthquake catalogue, we directly invert first-motion polarity data and quantify confidence intervals for the principal stress orientations. We find a combined strike-slip and normal faulting stress field for the Marmara region generally reflecting the overall transtensional setting. However, the results clearly show moderate local variations of the stress field. The largest (sigma 1) and intermediate (sigma 2) principal stresses show an average regional trend of N125 degrees E and locally varying plunges. The least principal stress (sigma 3) is well resolved in its confidence interval and consistent throughout the region with an average trend of approximate to N35 degrees E and a subhorizontal plunge. The eastern Sea of Marmara shows local stress field orientations with pronounced strike-slip (northern part) and normal faulting (southern part) components. Along the central Marmara region, normal faulting tends to dominate, while a well resolved strike-slip stress regime is found in the western Sea of Marmara region. Regarding the faulting mechanism of an earthquake with magnitude up to 7.4 which is expected in this area in direct vicinity of the Istanbul metropolitan region, our results imply that neither strike-slip nor normal faulting kinematics can be excluded.

Název v anglickém jazyce

Stress inversion of regional seismicity in the Sea of Marmara region, Turkey

Popis výsledku anglicky

In this study we derive the stress tensor and its local variations throughout the Marmara region, Turkey. Based on a recently compiled 10-year earthquake catalogue, we directly invert first-motion polarity data and quantify confidence intervals for the principal stress orientations. We find a combined strike-slip and normal faulting stress field for the Marmara region generally reflecting the overall transtensional setting. However, the results clearly show moderate local variations of the stress field. The largest (sigma 1) and intermediate (sigma 2) principal stresses show an average regional trend of N125 degrees E and locally varying plunges. The least principal stress (sigma 3) is well resolved in its confidence interval and consistent throughout the region with an average trend of approximate to N35 degrees E and a subhorizontal plunge. The eastern Sea of Marmara shows local stress field orientations with pronounced strike-slip (northern part) and normal faulting (southern part) components. Along the central Marmara region, normal faulting tends to dominate, while a well resolved strike-slip stress regime is found in the western Sea of Marmara region. Regarding the faulting mechanism of an earthquake with magnitude up to 7.4 which is expected in this area in direct vicinity of the Istanbul metropolitan region, our results imply that neither strike-slip nor normal faulting kinematics can be excluded.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10507 - Volcanology

Projekt

<a href="/cs/project/GC16-19751J" target="_blank" >GC16-19751J: Určení seismické anizotropie a útlumu z akustických emisí a pozorování přirozené a indukované seismicity</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Pure and Applied Geophysics

ISSN

0033-4553

e-ISSN

—

Svazek periodika

176

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

23

Strana od-do

1269-1291

Kód UT WoS článku

000462507200016

EID výsledku v databázi Scopus

2-s2.0-85060534269