Physically Based and Empirical Ground Motion Prediction Equations for Multiple Intensity Measures (PGA, PGV, <i>I<sub>a</sub></i>, FIV3, CII, and Maximum Fourier Acceleration Spectra) on Sakhalin Island
In the present study, empirical attenuation relations for multiple ground motion intensity measures (PGA, PGV, <i>I<sub>a</sub></i>, FIV3, CII, and MFAS) were developed for Sakhalin Island (in the far east of Russia). A recorded strong motion dataset was used, making GMPEs ap...
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MDPI AG
2023-06-01
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| Online Access: | https://www.mdpi.com/2076-3263/13/7/201 |
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| author | Alexey Konovalov Ilia Orlin Andrey Stepnov Yulia Stepnova |
| author_facet | Alexey Konovalov Ilia Orlin Andrey Stepnov Yulia Stepnova |
| author_sort | Alexey Konovalov |
| collection | DOAJ |
| description | In the present study, empirical attenuation relations for multiple ground motion intensity measures (PGA, PGV, <i>I<sub>a</sub></i>, FIV3, CII, and MFAS) were developed for Sakhalin Island (in the far east of Russia). A recorded strong motion dataset was used, making GMPEs applicable in active crustal regions with an earthquake magnitude range of 4–6 and a distance range of up to 150 km. The hypocentral distance was used as a basic distance metric. For the first time in the research, an analytical representation of Arias intensity (<i>I<sub>a</sub></i>) was obtained in the framework of a multi-asperity source model. Asperities are considered as sub-sources of high-frequency incoherent radiation. The physical representation of the attenuation model in our study was based on a stress drop on the asperities and the ratio of the total rupture area to the combined area of asperities. The average stress drop on asperities for the examined earthquakes was approximately 13.4 MPa, and the ratio of the total rupture area to the asperity area was 0.22, which is generally close to similar estimates for crustal earthquakes. The coefficients and statistical scattering of the attenuation models were also analyzed. Moreover, a magnitude scale based on a modified Arias intensity is proposed in the present study. The new magnitude scale has an explicit physical meaning and is characterized by its simplicity of measurement. It is associated with the acceleration source spectrum level and can be successfully used in early warning systems. |
| first_indexed | 2024-03-11T01:03:04Z |
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| issn | 2076-3263 |
| language | English |
| last_indexed | 2024-03-11T01:03:04Z |
| publishDate | 2023-06-01 |
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| spelling | doaj.art-c2c0fff826b64cf58fa1f68a7bc949b32023-11-18T19:31:49ZengMDPI AGGeosciences2076-32632023-06-0113720110.3390/geosciences13070201Physically Based and Empirical Ground Motion Prediction Equations for Multiple Intensity Measures (PGA, PGV, <i>I<sub>a</sub></i>, FIV3, CII, and Maximum Fourier Acceleration Spectra) on Sakhalin IslandAlexey Konovalov0Ilia Orlin1Andrey Stepnov2Yulia Stepnova3Far East Geological Institute of Far Eastern Branch, Russian Academy of Sciences, Prospect 100-Letya, 159, 690022 Vladivostok, RussiaFar East Geological Institute of Far Eastern Branch, Russian Academy of Sciences, Prospect 100-Letya, 159, 690022 Vladivostok, RussiaFar East Geological Institute of Far Eastern Branch, Russian Academy of Sciences, Prospect 100-Letya, 159, 690022 Vladivostok, RussiaFar East Geological Institute of Far Eastern Branch, Russian Academy of Sciences, Prospect 100-Letya, 159, 690022 Vladivostok, RussiaIn the present study, empirical attenuation relations for multiple ground motion intensity measures (PGA, PGV, <i>I<sub>a</sub></i>, FIV3, CII, and MFAS) were developed for Sakhalin Island (in the far east of Russia). A recorded strong motion dataset was used, making GMPEs applicable in active crustal regions with an earthquake magnitude range of 4–6 and a distance range of up to 150 km. The hypocentral distance was used as a basic distance metric. For the first time in the research, an analytical representation of Arias intensity (<i>I<sub>a</sub></i>) was obtained in the framework of a multi-asperity source model. Asperities are considered as sub-sources of high-frequency incoherent radiation. The physical representation of the attenuation model in our study was based on a stress drop on the asperities and the ratio of the total rupture area to the combined area of asperities. The average stress drop on asperities for the examined earthquakes was approximately 13.4 MPa, and the ratio of the total rupture area to the asperity area was 0.22, which is generally close to similar estimates for crustal earthquakes. The coefficients and statistical scattering of the attenuation models were also analyzed. Moreover, a magnitude scale based on a modified Arias intensity is proposed in the present study. The new magnitude scale has an explicit physical meaning and is characterized by its simplicity of measurement. It is associated with the acceleration source spectrum level and can be successfully used in early warning systems.https://www.mdpi.com/2076-3263/13/7/201GMPEFourier acceleration spectraasperityArias intensityactive cruststress drop |
| spellingShingle | Alexey Konovalov Ilia Orlin Andrey Stepnov Yulia Stepnova Physically Based and Empirical Ground Motion Prediction Equations for Multiple Intensity Measures (PGA, PGV, <i>I<sub>a</sub></i>, FIV3, CII, and Maximum Fourier Acceleration Spectra) on Sakhalin Island Geosciences GMPE Fourier acceleration spectra asperity Arias intensity active crust stress drop |
| title | Physically Based and Empirical Ground Motion Prediction Equations for Multiple Intensity Measures (PGA, PGV, <i>I<sub>a</sub></i>, FIV3, CII, and Maximum Fourier Acceleration Spectra) on Sakhalin Island |
| title_full | Physically Based and Empirical Ground Motion Prediction Equations for Multiple Intensity Measures (PGA, PGV, <i>I<sub>a</sub></i>, FIV3, CII, and Maximum Fourier Acceleration Spectra) on Sakhalin Island |
| title_fullStr | Physically Based and Empirical Ground Motion Prediction Equations for Multiple Intensity Measures (PGA, PGV, <i>I<sub>a</sub></i>, FIV3, CII, and Maximum Fourier Acceleration Spectra) on Sakhalin Island |
| title_full_unstemmed | Physically Based and Empirical Ground Motion Prediction Equations for Multiple Intensity Measures (PGA, PGV, <i>I<sub>a</sub></i>, FIV3, CII, and Maximum Fourier Acceleration Spectra) on Sakhalin Island |
| title_short | Physically Based and Empirical Ground Motion Prediction Equations for Multiple Intensity Measures (PGA, PGV, <i>I<sub>a</sub></i>, FIV3, CII, and Maximum Fourier Acceleration Spectra) on Sakhalin Island |
| title_sort | physically based and empirical ground motion prediction equations for multiple intensity measures pga pgv i i sub a sub i fiv3 cii and maximum fourier acceleration spectra on sakhalin island |
| topic | GMPE Fourier acceleration spectra asperity Arias intensity active crust stress drop |
| url | https://www.mdpi.com/2076-3263/13/7/201 |
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