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Journal Article

Improvements and Heterogeneities of the Global Centroid Moment Tensor Catalog Available to Purchase

Álvaro González
Published: 11 October 2024
Seismological Research Letters (2024) 95 (6): 3566–3578.
DOI: https://doi.org/10.1785/0220240272
... and considered in any application of the catalog, especially in statistical seismology, which analyzes large earthquake data sets. The Global Centroid Moment Tensor catalog is considered the most homogeneous database of global seismicity. However, a detailed analysis of its heterogeneities has been lacking...
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View PDF for article title, Improvements and Heterogeneities of the <span class="search-highlight">Global</span> <span class="search-highlight">Centroid</span> <span class="search-highlight">Moment</span> <span class="search-highlight">Tensor</span> Catalog
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Includes: Supplemental Content
Image
Eras distinguished in the Global Centroid Moment Tensor (Global CMT) catalog, separated by the beginning of the years 1977, 1986, and 2004 (marked). (a) Cumulative number of earthquakes, for all magnitudes or for moment magnitude Mw≤5.2 (median magnitude as of the end of 2023 in the catalog). (b) Centroid depths and their determination type. Note that in panel (b) the vertical scale is logarithmic, to enhance the differences in the minimum depth used during different eras (10, 12, or 15 km). The color version of this figure is available only in the electronic edition.

Eras distinguished in the Global Centroid Moment Tensor (Global CMT) catalo... Available to Purchase

Published: 11 October 2024
Figure 1. Eras distinguished in the Global Centroid Moment Tensor (Global CMT) catalog, separated by the beginning of the years 1977, 1986, and 2004 (marked). (a) Cumulative number of earthquakes, for all magnitudes or for moment magnitude M w ≤ 5.2 (median magnitude as of the end
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Epicenter locations of the Global Centroid Moment Tensor (Global CMT) catalog, Mw≥5.15, from 1 January 1996 to 31 October 2021. The color version of this figure is available only in the electronic edition.

Epicenter locations of the Global Centroid Moment Tensor (Global CMT) catal... Available to Purchase

Published: 27 February 2023
Figure 7. Epicenter locations of the Global Centroid Moment Tensor (Global CMT) catalog, M w ≥ 5.15 , from 1 January 1996 to 31 October 2021. The color version of this figure is available only in the electronic edition.
Image
(a) Earthquakes during 1976–2023 from the Global Centroid Moment Tensor (Global CMT) catalog are plotted by filled circles, and focal mechanisms are color‐coded: strike‐slip (red), normal faulting (green), and thrust (blue). The mainshock of the 2021 Offshore Gunsan earthquake is denoted by a red star in the inset figure, and its focal mechanism is shown as a focal mechanism plot with a lower hemispheric projection. The location of our study area is marked as a black rectangle. Earthquakes of magnitude mb&gt;4.0 during 1978–2020 from the International Seismological Centre (ISC) catalog are plotted by open circles to show background seismicity. Used seismographic stations around the Yellow Sea are plotted by filled triangles. All the stations are plotted in Figure S1a. Sedimentary basins in the Yellow Sea are represented as gray shaded areas: GB, Gunsan basin; NSYSB, northern south Yellow Sea basin; NYSB, north Yellow Sea basin; and SSYSB, southern south Yellow Sea basin. Triassic–Jurassic collision zone between the northern Sino‐Korean and southern Yangtze blocks is represented as a broad suture zone along the Wulian–Rongcheng fault (WRF) and Sulu suture–Qianliyan fault. The trend of the compressional stress axis σ1 is drawn with yellow arrows. (b) Earthquakes of the 2021 Offshore Gunsan earthquake sequences reported by the Korea Meteorological Administration (KMA) (blue circles), ISC (green circles), and nine events located in this study (red circles). Location uncertainties in horizontal and vertical directions in 95% confidence level are indicated by error bars on those events located in this study. For smaller events 3, 4, 5, and 8, their ISC epicenters are outside the map range. The color version of this figure is available only in the electronic edition.

(a) Earthquakes during 1976–2023 from the Global Centroid Moment Tensor (Gl... Available to Purchase

Published: 08 October 2024
Figure 1. (a) Earthquakes during 1976–2023 from the Global Centroid Moment Tensor (Global CMT) catalog are plotted by filled circles, and focal mechanisms are color‐coded: strike‐slip (red), normal faulting (green), and thrust (blue). The mainshock of the 2021 Offshore Gunsan earthquake
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Long‐term seismicity forecast and Global Centroid Moment Tensor earthquake catalog 1977–2021 for events Mw &gt; 5.663. The color version of this figure is available only in the electronic edition.

Long‐term seismicity forecast and Global Centroid Moment Tensor earthquake ... Available to Purchase

Published: 14 September 2022
Figure 10. Long‐term seismicity forecast and Global Centroid Moment Tensor earthquake catalog 1977–2021 for events M w  > 5.663. The color version of this figure is available only in the electronic edition.
Image
Regression between Mw from Global Centroid Moment Tensor (CMT) and Geo Forschungs Zentrum Potsdam (GFZP) global catalogs, (a) using all data and (b) using only those with MwGFZP&gt;5.4 (b). CSQ, chi square; OLS, ordinary least squares. The color version of this figure is available only in the electronic edition.

Regression between M w from Global Centroid Moment Tensor (CMT) an... Available to Purchase

Published: 02 September 2020
Figure 1. Regression between M w from Global Centroid Moment Tensor (CMT) and Geo Forschungs Zentrum Potsdam (GFZP) global catalogs, (a) using all data and (b) using only those with M w GFZP > 5.4 (b). CSQ, chi square; OLS, ordinary least squares. The color version
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Focal Mechanisms (Global Centroid Moment Tensor; see Data and Resources) of major earthquakes in Georgia and surrounding regions. The color version of this figure is available only in the electronic edition.

Focal Mechanisms (Global Centroid Moment Tensor; see Data and Resources ) ... Available to Purchase

Published: 15 April 2020
Figure 3. Focal Mechanisms (Global Centroid Moment Tensor; see Data and Resources ) of major earthquakes in Georgia and surrounding regions. The color version of this figure is available only in the electronic edition.
Image
The focal mechanism obtained from the Global Centroid Moment Tensor (CMT) catalog in the vicinity of the observed east‐northeast–west‐southwest‐oriented trends (T1–T3). The Global CMT solutions suggest the presence of oblique left‐lateral strike‐slip motion on either side of the trench.The color version of this figure is available only in the electronic edition.

The focal mechanism obtained from the Global Centroid Moment Tensor (CMT) c... Available to Purchase

Published: 29 January 2019
Figure 8. The focal mechanism obtained from the Global Centroid Moment Tensor (CMT) catalog in the vicinity of the observed east‐northeast–west‐southwest‐oriented trends (T1–T3). The Global CMT solutions suggest the presence of oblique left‐lateral strike‐slip motion on either side
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Earthquakes from the Global Centroid Moment Tensor (CMT) catalog, with shading by depth, and size scaled by magnitude, from the beginning of the catalog in 1976 to end‐2016. (a) Thrust earthquakes (tension axis plunge &gt;45) within 150 km of the Main Frontal thrust (MFT) and (b) nonthrust earthquakes within 250 km of the MFT. Faults shown are active faults from Styron et al. (2010). The surface trace of the MFT is highlighted. NSC, National Seismological Centre; NEIC, National Earthquake Information Center.The color version of this figure is available only in the electronic edition.

Earthquakes from the Global Centroid Moment Tensor (CMT) catalog, with shad... Available to Purchase

Published: 11 September 2018
Figure 1. Earthquakes from the Global Centroid Moment Tensor (CMT) catalog, with shading by depth, and size scaled by magnitude, from the beginning of the catalog in 1976 to end‐2016. (a) Thrust earthquakes (tension axis plunge > 45 ) within 150 km of the Main Frontal thrust (MFT) and (b
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REGIONAL b VALUE CALCULATIONS BASED ON GLOBAL CENTROID MOMENT TENSOR (GCM... Open Access

Published: 06 July 2018
TABLE 2. REGIONAL b VALUE CALCULATIONS BASED ON GLOBAL CENTROID MOMENT TENSOR (GCMT) CATALOG DATA
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Comparison between Mw (determined by the Global Centroid Moment Tensor project) and Me (determined by GeoForschungsZentrums [GFZ], German Research Centre for Geosciences) for 990 events. Different symbols represent the type of mechanism. The 1:1 line is also plotted, as well as dotted lines indicating Me=Mw±0.5. Modified from Di Giacomo et al. (2010), including data from the year 2008. The color version of this figure is available only in the electronic edition.

Comparison between M w (determined by the Global Centroid Moment Tensor ... Available to Purchase

Published: 04 November 2014
Figure 1. Comparison between M w (determined by the Global Centroid Moment Tensor project) and M e (determined by GeoForschungsZentrums [GFZ], German Research Centre for Geosciences) for 990 events. Different symbols represent the type of mechanism. The 1:1 line is also plotted, as well
Image
Earthquakes are for Global Centroid Moment Tensor (CMT) thrust solutions of M 5–6 (yellow), M 6–7 (orange), M 7–8 (green), and M &gt;8 (red) dating from 1976 to 2010 (http://www.globalcmt.org/). The locations of significant earthquake epicenters (1957, 1986, and 1996) are labeled. The depth to the top of the subducting Pacific plate (in km) is shown by red lines (Hayes et al., 2012). Note the shallow depth of the plate beneath Adak Island.

Earthquakes are for Global Centroid Moment Tensor (CMT) thrust solutions of... Open Access

Published: 01 December 2012
Figure 3. Earthquakes are for Global Centroid Moment Tensor (CMT) thrust solutions of M 5–6 (yellow), M 6–7 (orange), M 7–8 (green), and M >8 (red) dating from 1976 to 2010 ( http://www.globalcmt.org/ ). The locations of significant earthquake epicenters (1957, 1986, and 1996) are labeled
Journal Article

Uncertainties in Seismic Moment Tensors Inferred from Differences between Global Catalogs Available to Purchase

Boris Rösler, Seth Stein, Bruce D. Spencer
Published: 02 June 2021
Seismological Research Letters (2021) 92 (6): 3698–3711.
DOI: https://doi.org/10.1785/0220210066
... in the U.S. Geological Survey (USGS) and the Global Centroid Moment Tensor (Global CMT) Project catalogs for November 2015–December 2020 and use the differences to illustrate the uncertainties. The differences are typically an order of magnitude larger than the reported errors, suggesting that the errors...
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View PDF for article title, Uncertainties in Seismic <span class="search-highlight">Moment</span> <span class="search-highlight">Tensors</span> Inferred from Differences between <span class="search-highlight">Global</span> Catalogs
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Journal Article

Characterizing Lithospheric Transverse Isotropy Using Moment Tensors—On the Origin of the Non–Double‐Couple Components of Global CMT Solutions Available to Purchase

Hitoshi Kawakatsu
Published: 30 September 2024
Bulletin of the Seismological Society of America (2024) 114 (6): 2995–3010.
DOI: https://doi.org/10.1785/0120240136
... and the fifth parameter η κ , but with moderate to severe correlation depending on data types. The application of this method to real data sourced from the Global Centroid Moment Tensor catalog suggests that the lithospheric transverse isotropy of PREM at the sub‐Moho depth serves as a suitable initial model...
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View PDF for article title, Characterizing Lithospheric Transverse Isotropy Using <span class="search-highlight">Moment</span> <span class="search-highlight">Tensors</span>—On the Origin of the Non–Double‐Couple Components of <span class="search-highlight">Global</span> CMT Solutions
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Journal Article

Improved Earthquake Source Parameters with 3D Wavespeed Models in California and Nevada Available to Purchase

Claire Doody, Arthur Rodgers, Andrea Chiang, Michael Afanasiev, Christian Boehm, Lion Krischer, Nathan Simmons
Published: 22 July 2024
Seismological Research Letters (2025) 96 (1): 499–509.
DOI: https://doi.org/10.1785/0220240011
... than the Global Centroid Moment Tensor catalog and increase usable, well‐correlated data by up to 7%. Therefore, we argue that recalculating source parameters should be considered in AWT workflows, particularly for smaller magnitude events ( M w < 5.0 ). Summarizing the results for the Santa...
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View PDF for article title, Improved Earthquake Source Parameters with 3D Wavespeed Models in California and Nevada
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Journal Article

gWFM: A Global Catalog of Moderate‐Magnitude Earthquakes Studied Using Teleseismic Body Waves Available to Purchase

Sam Wimpenny, C. Scott Watson
Published: 09 December 2020
Seismological Research Letters (2021) 92 (1): 212–226.
DOI: https://doi.org/10.1785/0220200218
... online (see Data and Resources ). In this article, we describe the methods used to construct the gWFM and present a comparison between the earthquake depths and focal mechanisms in the gWFM with those derived by the International Seismological Centre, Global Centroid Moment Tensor (Global CMT) project...
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View PDF for article title, gWFM: A <span class="search-highlight">Global</span> Catalog of Moderate‐Magnitude Earthquakes Studied Using Teleseismic Body Waves
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Journal Article

gCAPjoint, A Software Package for Full Moment Tensor Inversion of Moderately Strong Earthquakes with Local and Teleseismic Waveforms Available to Purchase

Qipeng Bai, Sidao Ni, Risheng Chu, Zhe Jia
Published: 19 August 2020
Seismological Research Letters (2020) 91 (6): 3550–3562.
DOI: https://doi.org/10.1785/0220200031
..., we perform case studies on three earthquakes with different tectonic settings and source properties. Comparison of our results with global centroid moment tensor and other catalog solutions illustrates that both non‐double‐couple compositions of the focal mechanisms and centroid depths can...
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View PDF for article title, gCAPjoint, A Software Package for Full <span class="search-highlight">Moment</span> <span class="search-highlight">Tensor</span> Inversion of Moderately Strong Earthquakes with Local and Teleseismic Waveforms
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Journal Article

Which Global Moment Tensor Catalog Provides the Most Precise Non‐Double‐Couple Components? Available to Purchase

Boris Rösler, Bruce D. Spencer, Seth Stein
Published: 06 March 2024
Seismological Research Letters (2024) 95 (4): 2444–2451.
DOI: https://doi.org/10.1785/0220230372
... in different catalogs, we quantify the reliability of NDC components in moment tensor catalogs through the determination of the effects of unmodeled and inaccurately modeled effects contained in them. We determine that the NDC components in the Global Centroid Moment Tensor catalog are, on average, more...
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View PDF for article title, Which <span class="search-highlight">Global</span> <span class="search-highlight">Moment</span> <span class="search-highlight">Tensor</span> Catalog Provides the Most Precise Non‐Double‐Couple Components?
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Journal Article

Early Source Characterization of Large Earthquakes Using W Phase and Prompt Elastogravity Signals Available to Purchase

Kévin Juhel, Zacharie Duputel, Luis Rivera, Martin Vallée
Published: 14 November 2023
Seismological Research Letters (2024) 95 (3): 1558–1568.
DOI: https://doi.org/10.1785/0220230195
... quality of global and regional networks enabled to gather the best PEGS data set so far. We first confirm that the well‐established W ‐phase method, using records from global seismological networks, is able to provide a reliable centroid moment tensor solution 22 min after the earthquake origin time...
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View PDF for article title, Early Source Characterization of Large Earthquakes Using W Phase and Prompt Elastogravity Signals
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Journal Article

A New Automatic Full‐Waveform Regional Moment Tensor Inversion Algorithm and Its Applications in the Taiwan Area Available to Purchase

Pei‐Ru Jian, Tai‐Lin Tseng, Wen‐Tzong Liang, Ping‐Han Huang
Published: 13 February 2018
Bulletin of the Seismological Society of America (2018) 108 (2): 573–587.
DOI: https://doi.org/10.1785/0120170231
... MT catalog for the Taiwan area. Overall, the AutoBATS MTs are consistent with the Global Centroid Moment Tensors, with a mean difference in the Kagan angle of 22.0 ° ± 16.6 ° and M w of − 0.08 ± 0.10 . Those focal mechanisms better illuminate the tectonic structures, which is a result...
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View PDF for article title, A New Automatic Full‐Waveform Regional <span class="search-highlight">Moment</span> <span class="search-highlight">Tensor</span> Inversion Algorithm and Its Applications in the Taiwan Area
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