Bimodality of P-wave travel time residuals found in the CTBTO
seismological data (REB-bulletins)

J 2024

Bimodality of P-wave travel time residuals found in the CTBTO seismological data (REB-bulletins)

HAVÍŘ, Josef

Základní údaje

Originální název

Bimodality of P-wave travel time residuals found in the CTBTO seismological data (REB-bulletins)

Název česky

Bimodalita časových reziduí P-vln zjištěná v seismologických datech CTBTO (REB-bulletiny)

Autoři

HAVÍŘ, Josef (203 Česká republika, garant, domácí)

Vydání

Acta Geodynamica et Geomaterialia, CZECH REPUBLIC, ACAD SCI CZECH REPUBLIC INST ROCK STRUCTURE & MECHANICS, 2024, 1214-9705

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10505 Geology

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Odkazy

odkaz na text na domácí stránce časopisu

Impakt faktor

Impact factor: 0.900 v roce 2023

Kód RIV

RIV/00216224:14310/24:00138586

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.13168/AGG.2024.0024

UT WoS

001382747500003

EID Scopus

2-s2.0-85213406837

Klíčová slova anglicky

seismic monitoring; CTBTO; time residuals; lithospheric inhomogeneities

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 21. 3. 2025 15:43, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

REB-bulletins of CTBTO from the period 2000-2023 were used for simple statistical evaluation of the travel time residuals of P-waves detected at the epicentral distance from 30° to 90° arrived from the seismic events of magnitude 5 or greater, with hypocentre no deeper than 50 km. While histograms of time residuals calculated for individual stations of the International Monitoring System CTBTO show expected unimodal (Gaussian) distribution, curves expressing distribution of the arithmetic means and medians calculated from data of these individual stations are bimodal. This bimodality can be explained by the sum of two Gaussian curves related to groups of “fast” and “slow” stations, with a modus difference of about 0.4 to 0.5 seconds. Although discussed bimodality is best visible on residuals related to phases detected at the epicentral distance 70° to 90°, it is evident that also curves related to the nearest evaluated phases (from 30° to 50°) are the sum of two Gaussian curves. So, the reason for bimodality should be sought in the upper mantle or crust, which is consistent with the assumption of “two kinds” of the continental lithosphere (Poupinet et al., 2003). The distribution of “fast” and “slow” stations on the map corresponds with published results of global seismic tomography studies.

Návaznosti

EF16_026/0008459, projekt VaV

Název: Dlouhodobý výzkum geochemických bariér pro ukládání jaderného odpadu

Citovat

HAVÍŘ, Josef. Bimodality of P-wave travel time residuals found in the CTBTO seismological data (REB-bulletins). Acta Geodynamica et Geomaterialia. CZECH REPUBLIC: ACAD SCI CZECH REPUBLIC INST ROCK STRUCTURE & MECHANICS, 2024, roč. 21, č. 4, s. 297-302. ISSN 1214-9705. Dostupné z: https://dx.doi.org/10.13168/AGG.2024.0024.

@article{2470284,
   author = {Havíř, Josef},
   article_location = {CZECH REPUBLIC},
   article_number = {4},
   doi = {http://dx.doi.org/10.13168/AGG.2024.0024},
   keywords = {seismic monitoring; CTBTO; time residuals; lithospheric inhomogeneities},
   language = {eng},
   issn = {1214-9705},
   journal = {Acta Geodynamica et Geomaterialia},
   title = {Bimodality of P-wave travel time residuals found in the CTBTO seismological data (REB-bulletins)},
   url = {https://www.irsm.cas.cz/materialy/acta_content/2024_doi/Havir_AGG_2024_0024.pdf},
   volume = {21},
   year = {2024}
}

TY  - JOUR
ID  - 2470284
AU  - Havíř, Josef
PY  - 2024
TI  - Bimodality of P-wave travel time residuals found in the CTBTO seismological data (REB-bulletins)
JF  - Acta Geodynamica et Geomaterialia
VL  - 21
IS  - 4
SP  - 297-302
EP  - 297-302
PB  - ACAD SCI CZECH REPUBLIC INST ROCK STRUCTURE & MECHANICS
SN  - 12149705
KW  - seismic monitoring
KW  - CTBTO
KW  - time residuals
KW  - lithospheric inhomogeneities
UR  - https://www.irsm.cas.cz/materialy/acta_content/2024_doi/Havir_AGG_2024_0024.pdf
N2  - REB-bulletins of CTBTO from the period 2000-2023 were used for simple statistical evaluation of the travel time residuals of P-waves detected at the epicentral distance from 30° to 90° arrived from the seismic events of magnitude 5 or greater, with hypocentre no deeper than 50 km. While histograms of time residuals calculated for individual stations of the International Monitoring System CTBTO show expected unimodal (Gaussian) distribution, curves expressing distribution of the arithmetic means and medians calculated from data of these individual stations are bimodal. This bimodality can be explained by the sum of two Gaussian curves related to groups of “fast” and “slow” stations, with a modus difference of about 0.4 to 0.5 seconds. Although discussed bimodality is best visible on residuals related to phases detected at the epicentral distance 70° to 90°, it is evident that also curves related to the nearest evaluated phases (from 30° to 50°) are the sum of two Gaussian curves. So, the reason for bimodality should be sought in the upper mantle or crust, which is consistent with the assumption of “two kinds” of the continental lithosphere (Poupinet et al., 2003). The distribution of “fast” and “slow” stations on the map corresponds with published results of global seismic tomography studies.
ER  -

HAVÍŘ, Josef. Bimodality of P-wave travel time residuals found in the CTBTO seismological data (REB-bulletins). \textit{Acta Geodynamica et Geomaterialia}. CZECH REPUBLIC: ACAD SCI CZECH REPUBLIC INST ROCK STRUCTURE \&{} MECHANICS, 2024, roč.~21, č.~4, s.~297-302. ISSN~1214-9705. Dostupné z: https://dx.doi.org/10.13168/AGG.2024.0024.

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