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Journal Article

Updated GMICE for Central and Eastern North America Extending to Higher Intensities

Chris H. Cramer
Published: 23 September 2020
Seismological Research Letters (2020) 91 (6): 3518–3527.
DOI: https://doi.org/10.1785/0220200061
... and Eastern North America (CENA) ground‐motion intensity correlation equation (GMICE) database allows the updating of a CENA GMICE from a linear (below intensity six) relationship to a more accurate bilinear relationship (up to intensity eight). The updating of the CENA GMICE is accomplished using linear...
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New Ground Motion to Intensity Conversion Equations (GMICEs) for New Zealand

Jose M. Moratalla, Tatiana Goded, David A. Rhoades, Silvia Canessa, Matthew C. Gerstenberger
Published: 30 September 2020
Seismological Research Letters (2021) 92 (1): 448–459.
DOI: https://doi.org/10.1785/0220200156
... estimations that require statistical relationships between intensities and strong‐motion data. In New Zealand, there was an urgent need to update the ground motion to intensity conversion equation (GMICE) from 2007, developed prior to a large number of recent earthquakes including the 2010–2011 Canterbury...
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Ground Motion to Intensity Conversion Equations (GMICEs): A Global Relationship and Evaluation of Regional Dependency

Marta Caprio, Bernadetta Tarigan, C. Bruce Worden, Stefan Wiemer, David J. Wald
Published: 05 May 2015
Bulletin of the Seismological Society of America (2015) 105 (3): 1476–1490.
DOI: https://doi.org/10.1785/0120140286
... ). With the development of seismic networks and the growing abundance of strong‐motion records, the tendency is reversed, now associating intensity to a given ground‐motion value with ground motion to intensity conversion equations ( GMICE s; Wald, Quitoriano, Heaton, and Kanamori, 1999 ; Atkinson and Sonley, 2000...
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Uncertainty in Ground‐Motion‐to‐Intensity Conversions Significantly Affects Earthquake Early Warning Alert Regions

Jessie K. Saunders, Annemarie S. Baltay, Sarah E. Minson, Maren Böse
Published: 16 May 2024
The Seismic Record (2024) 4 (2): 121–130.
DOI: https://doi.org/10.1785/0320240004
...Jessie K. Saunders; Annemarie S. Baltay; Sarah E. Minson; Maren Böse Abstract We examine how the choice of ground‐motion‐to‐intensity conversion equations (GMICEs) in earthquake early warning (EEW) systems affects resulting alert regions. We find that existing GMICEs can underestimate observed...
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New Methodology for Unbiased Ground‐Motion Intensity Conversion Equations

Molly Gallahue, Norman Abrahamson
Published: 29 March 2023
Bulletin of the Seismological Society of America (2023) 113 (3): 1133–1151.
DOI: https://doi.org/10.1785/0120220224
...Molly Gallahue; Norman Abrahamson ABSTRACT Ground‐motion intensity conversion equations (GMICEs) allow for conversions between ground‐motion amplitude and shaking intensity. The current methods used to develop GMICEs model the dependence of the intensity on the peak ground‐motion (PGM) parameter...
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<span class="search-highlight">GMICEs</span> derived for New Zealand, for (a)  log PGV and (b)  log P...

GMICEs derived for New Zealand, for (a)  log PGV and (b)  log P...

Published: 30 September 2020
Figure 6. GMICEs derived for New Zealand, for (a)  log PGV and (b)  log PGA . (c,d) New Zealand GMICE and comparison with other published GMICEs.
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Distributions of modified Mercalli intensity (MMI) with distance for three ...

Distributions of modified Mercalli intensity (MMI) with distance for three ...

Published: 16 May 2024
; Bozorgnia et al. , 2014 ) with modeling assumptions consistent with ShakeAlert and the different Worden et al. (2012) ground‐motion‐to‐intensity conversion equations (GMICEs) considered in this study (colored lines; Table  1 ). We have separated this comparison into two plots for clarity: (a) GMICEs
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Operational flow chart of processing steps performed. <span class="search-highlight">GMICE</span>, ground‐motion ...

Operational flow chart of processing steps performed. GMICE, ground‐motion ...

Published: 13 September 2024
Figure 1. Operational flow chart of processing steps performed. GMICE, ground‐motion intensity conversion equation; and NRMSE, normalized root mean square error. The color version of this figure is available only in the electronic edition.
Journal Article

New Macroseismic Intensity Assessment Method for New Zealand Web Questionnaires

Tatiana Goded, Nick Horspool, Silvia Canessa, Adam Lewis, Krystal Geraghty, Amy Jeffrey, Matt Gerstenberger
Published: 24 January 2018
Seismological Research Letters (2018) 89 (2A): 640–652.
DOI: https://doi.org/10.1785/0220170163
...‐motion intensity conversion equation (GMICE), and (3) community intensities from a recent GMICE using California data. Results show a good consistency in community intensities between the matrix, postal traditional, and California GMICE methods. However, CMMI derived using the New Zealand GMICE shows...
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Comparison of the scaling of the <span class="search-highlight">GMICE</span> with the ϵ ln ( PGA ) ...

Comparison of the scaling of the GMICE with the ϵ ln ( PGA ) ...

Published: 29 March 2023
Figure 8. Comparison of the scaling of the GMICE with the ϵ ln ( PGA ) for the current approach (WGRW12) and the proposed approaches. The strong scaling with ϵ ln ( PGA ) in the current approach leads to a large bias in the estimated intensity as the | ϵ ln
Journal Article

High‐Intensity Assignments for the 22 February 2011 M w 6.2 Christchurch, Canterbury, New Zealand, Earthquake: A Contribution toward Understanding the Severe Damage Caused by This Event

Tatiana Goded, Matt Gerstenberger, Mark Stirling, Jim Cousins, Silvia Canessa
Published: 17 April 2019
Seismological Research Letters (2019) 90 (4): 1468–1482.
DOI: https://doi.org/10.1785/0220180385
... intensity correlation equations (GMICEs) indicate an underestimation of MMI when using the GMICEs and the need to review New Zealand’s GMICE. * Corresponding author: [email protected] 17 December 2018 © Seismological Society of America Internet‐based macroseismic surveys have...
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Journal Article

Felt Intensity versus Instrumental Ground Motion: A Difference between California and Eastern North America?

Donny T. Dangkua, Chris H. Cramer
Published: 01 August 2011
Bulletin of the Seismological Society of America (2011) 101 (4): 1847–1858.
DOI: https://doi.org/10.1785/0120100133
...Donny T. Dangkua; Chris H. Cramer Abstract We examine the question of whether a single ground-motion intensity correlation equation ( GMICE ) is applicable to both eastern North America ( ENA ; intraplate) and California (interplate). We initially address this issue with the datasets from previous...
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(a) MMI versus PGA and (b) MMI versus PGV <span class="search-highlight">GMICE</span> curves from this study for ...

(a) MMI versus PGA and (b) MMI versus PGV GMICE curves from this study for ...

Published: 23 September 2020
Figure 9. (a) MMI versus PGA and (b) MMI versus PGV GMICE curves from this study for various distance and magnitude combinations: M  4.0 at 100 km—dashed‐dotted line, M  5.0 at 100 km—dotted line, M  6.0 at 10 km—long‐dashed–short‐dashed line, M  6.0 at 100 km—solid line, M
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Comparison of CMMI between the matrix and Gerstenberger and Worden <span class="search-highlight">GMICE</span> me...

Comparison of CMMI between the matrix and Gerstenberger and Worden GMICE me...

Published: 24 January 2018
Figure 6. Comparison of CMMI between the matrix and Gerstenberger and Worden GMICE methods corresponding to the total number of communities from the nine earthquakes analyzed in this article.
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Performance of our relationship with respect to the previous <span class="search-highlight">GMICE</span> for P...

Performance of our relationship with respect to the previous GMICE for P...

Published: 29 November 2016
Figure 13. Performance of our relationship with respect to the previous GMICE for PGV . Symbols show binned data, and the circles show the observed log 10 ( PGV ) used in this study.The color version of this figure is available only in the electronic edition.
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Intensity residuals (predicted–observed) for <span class="search-highlight">GMICE</span> derived in this study,...

Intensity residuals (predicted–observed) for GMICE derived in this study,...

Published: 05 May 2015
Figure 12. Intensity residuals (predicted–observed) for GMICE derived in this study, Atkinson and Kaka (2007 ; AK07), and Worden et al. (2012 ; Wo12), for PGV . Triangles show the results before the application of the correction terms defined in each study, and circles include
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Distributions of intensity residuals between the DYFI CDI observations and ...

Distributions of intensity residuals between the DYFI CDI observations and ...

Published: 16 May 2024
Figure 3. Distributions of intensity residuals between the DYFI CDI observations and MMI calculated using the NGA‐West2 GMPEs and the different Worden et al. (2012) GMICEs tested: (a)  MMI PGA (eq. 3); (b)  MMI PGV (eq. 3); (c) MMI (eq.s 3+9); (d) MMI (eq.s 3+10); (e)  MMI
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NRMSEs were calculated to compare the simulated intensity obtained using th...

NRMSEs were calculated to compare the simulated intensity obtained using th...

Published: 13 September 2024
Figure 7. NRMSEs were calculated to compare the simulated intensity obtained using the GMICEs by (a)  Gomez‐Capera et al. (2020 , referred to as GC20) and (b)  Oliveti et al. (2022 , referred to as OL22) and the observed intensity. The model performance is evaluated for PGA, PGV, spectral
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I hazard curves from AWW14 IPE (expected) and from the PGA hazard converte...

I hazard curves from AWW14 IPE (expected) and from the PGA hazard converte...

Published: 29 March 2023
Figure 13. I hazard curves from AWW14 IPE (expected) and from the PGA hazard converted to I using various GMICEs developed from the simulation data using WGRW12 methods (equation  13 ) and using the proposed methods. For this example, ln(PGA) is the predictor variable used in the GMICE
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(a) CMMI differences between he Gerstenberger ground‐motion intensity conve...

(a) CMMI differences between he Gerstenberger ground‐motion intensity conve...

Published: 24 January 2018
Figure 5. (a) CMMI differences between he Gerstenberger ground‐motion intensity conversion equation (GMICE) and the traditional method and (b) MMI differences using the matrix, traditional, and Gerstenberger GMICE methods for the 10 communities for which the 3 MMIs have been assigned in the 14