Moment tensor solutions along the central Lesser Antilles using regional broadband stations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10366800" target="_blank" >RIV/00216208:11320/17:10366800 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.tecto.2017.06.024" target="_blank" >http://dx.doi.org/10.1016/j.tecto.2017.06.024</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.tecto.2017.06.024" target="_blank" >10.1016/j.tecto.2017.06.024</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Moment tensor solutions along the central Lesser Antilles using regional broadband stations

Popis výsledku v původním jazyce

Using waveform data gathered from the seismological networks of the Lesser Antilles, we calculate 38 moment tensors for earthquakes with M &gt;= 3, from 2013 to middle of 2015 by full waveform inversion. Nine of these moment tensor solutions are in good agreement with those previously reported by other institutions, it provides some guarantee for 29 new moment tensors for the central region of the Lesser Antilles. For earthquakes within the upper Caribbean lithosphere, our results evidence that extensional and strike-slip focal mechanisms are predominant, resulting from the intra-plate deformation produced by the subduction of the North America and South American Plates under the Caribbean Plate, whereas very few thrust events are observed. For deeper earthquakes (&gt;90 km), our results compare well with older focal mechanisms from previous studies, showing normal oblique or strike slip faulting within the subducted slab. However, the inversion for most of the deeper events is less reliable (as documented, for example, by their larger condition numbers). We use the newly obtained moment magnitudes to estimate the scaling relationship with the local magnitude MLv computed by the regional seismic network. The two magnitudes are consistent for earthquakes with magnitudes M &gt; 4, with a slope close to unity. Further work is needed to precise the scaling relation for M &lt; 4. (C) 2017 Published by Elsevier B.V.

Název v anglickém jazyce

Moment tensor solutions along the central Lesser Antilles using regional broadband stations

Popis výsledku anglicky

Using waveform data gathered from the seismological networks of the Lesser Antilles, we calculate 38 moment tensors for earthquakes with M &gt;= 3, from 2013 to middle of 2015 by full waveform inversion. Nine of these moment tensor solutions are in good agreement with those previously reported by other institutions, it provides some guarantee for 29 new moment tensors for the central region of the Lesser Antilles. For earthquakes within the upper Caribbean lithosphere, our results evidence that extensional and strike-slip focal mechanisms are predominant, resulting from the intra-plate deformation produced by the subduction of the North America and South American Plates under the Caribbean Plate, whereas very few thrust events are observed. For deeper earthquakes (&gt;90 km), our results compare well with older focal mechanisms from previous studies, showing normal oblique or strike slip faulting within the subducted slab. However, the inversion for most of the deeper events is less reliable (as documented, for example, by their larger condition numbers). We use the newly obtained moment magnitudes to estimate the scaling relationship with the local magnitude MLv computed by the regional seismic network. The two magnitudes are consistent for earthquakes with magnitudes M &gt; 4, with a slope close to unity. Further work is needed to precise the scaling relation for M &lt; 4. (C) 2017 Published by Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10500 - Earth and related environmental sciences

Projekt

<a href="/cs/project/GA14-04372S" target="_blank" >GA14-04372S: Složitost zdrojů tektonických zemětřesení na různých časoprostorových škálách</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Tectonophysics

ISSN

0040-1951

e-ISSN

—

Svazek periodika

717

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

214-225

Kód UT WoS článku

000414879200015

EID výsledku v databázi Scopus

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