ISOLA2024: Assessing and Understanding Uncertainties of Full Moment Tensors
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10508372" target="_blank" >RIV/00216208:11320/25:10508372 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=9.WH-TWcXi" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=9.WH-TWcXi</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1785/0220240420" target="_blank" >10.1785/0220240420</a>
Alternative languages
Result language
angličtina
Original language name
ISOLA2024: Assessing and Understanding Uncertainties of Full Moment Tensors
Original language description
ISOLA is a software package designed to calculate centroid moment tensors (MTs) by waveform inversion for single- and multiple-point-source models. Calculations are running with Fortran codes under Matlab Graphic User Interface. The codes have been continuously developed and widely used for over 20 yr. ISOLA2024 is the latest version upgraded in the assessment of MT uncertainties, important mainly for non-double-couple (non-DC) MT components. Data error is assumed to be represented by residual waveforms. The uncertainties are evaluated with existing methods using four types of covariance matrices (CMs). The code produces simple statistics of non-DC components, including their variations over grid-searched source positions. Hudson's plots of MT scatter enable the classification of the source type. The CM methods are explained with four earthquake data sets. We show that CMs may assist in choosing a low-noise frequency range for inversion and suppress correlated data errors; thus, they improve the MT estimate, yet do not increase waveform fit. Error bounds of the non-DC percentages strongly vary across the example events (up to similar to 20%) and slightly change with the used CM type. In certain applications, as a joint effect of the source position, station configuration, frequency range, and velocity model, MT uncertainty can be so large that tions, the non-DC components can be resolved very well, within similar to 5%. In contrast to automated MT inversions, ISOLA2024 is suitable for applications involving repeated inversions of an earthquake, with varied parameters, and offers insight into the processing steps. It is also a test bed for new CM methods before their automation and can serve as an educational tool.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10500 - Earth and related environmental sciences
Result continuities
Project
<a href="/en/project/GA23-06345S" target="_blank" >GA23-06345S: Seismo-geodynamic modeling of the Hellenic subduction</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Seismological Research Letters
ISSN
0895-0695
e-ISSN
1938-2057
Volume of the periodical
96
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
13
Pages from-to
2647-2659
UT code for WoS article
001533699100043
EID of the result in the Scopus database
2-s2.0-105009954620