Evaluating the seismic hazard to Sikkim region of Himalaya using simulated accelerograms.
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| Title: | Evaluating the seismic hazard to Sikkim region of Himalaya using simulated accelerograms. |
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| Authors: | Yadav, Renu1 (AUTHOR) renuyadav_geokuk@yahoo.com, Kumar, Dinesh1 (AUTHOR) |
| Source: | Journal of Earth System Science. Jun2022, Vol. 131 Issue 2, p1-18. 18p. |
| Subjects: | Accelerograms, Tall buildings, Spectral sensitivity, Earthquake hazard analysis, Earthquake damage, Hazards |
| Geographic Terms: | Himalaya Mountains |
| Abstract: | The 2011 Sikkim earthquake (M 6.9) of the Himalaya has shown that a moderate size earthquake may also cause severe damage to the region. Simulated accelerograms using a modified hybrid technique have been generated at spatially distributed 702 points for a moderate size (M 6.9) earthquake in the Sikkim region of Himalaya to evaluate the seismic hazard in the region. The peak ground acceleration (PGA) values and response spectra have been derived from the simulated accelerograms. The synthetic PGA values, corresponding modified mercalli (MM) intensity values and response spectral acceleration values have been contoured to present the scenario hazard maps of the region. A PGA value of 400 cm/s2 has been estimated in the region near the epicentre of the earthquake. The response spectral acceleration values for five periods corresponding to the natural period (T) of single-storey buildings, double-storey buildings, 3–4 storey buildings, tall buildings and high-rise buildings have been obtained. The maximum values of response spectral accelerations estimated in the centre of meizoseismal zone are 1200 cm/s2 (T = 0.1 s), 1800 cm/s2 (T = 0.2 s), 900 cm/s2 (T = 0.5 s), 800 cm/s2 (T = 1.0 s) and 80 cm/s2 (T = 6 s). The decay curves show that PGA values in the west direction are lower as compared to the values in other directions at similar distances. Also, it has been observed that the PGA and spectral acceleration values decay slowly in the west direction compared to other directions. The scenario hazard maps present here are expected to be useful for mitigating seismic hazards from the region as these maps indicate the damage potential due to future moderate size earthquakes in the region. Article Highlights: The application of a modified hybrid technique has been presented to evaluate the seismic hazard based on simulating accelerograms for a moderate size earthquake in the Sikkim region of Himalaya. The synthetic accelerograms have been generated at 702 points distributed spatially on a grid. The scenario hazard maps showing the spatial distribution of PGA values, MM intensity values and response spectral acceleration values at different periods. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Earth System Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 156496763 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Evaluating the seismic hazard to Sikkim region of Himalaya using simulated accelerograms. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Yadav%2C+Renu%22">Yadav, Renu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> renuyadav_geokuk@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Kumar%2C+Dinesh%22">Kumar, Dinesh</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Earth+System+Science%22">Journal of Earth System Science</searchLink>. Jun2022, Vol. 131 Issue 2, p1-18. 18p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Accelerograms%22">Accelerograms</searchLink><br /><searchLink fieldCode="DE" term="%22Tall+buildings%22">Tall buildings</searchLink><br /><searchLink fieldCode="DE" term="%22Spectral+sensitivity%22">Spectral sensitivity</searchLink><br /><searchLink fieldCode="DE" term="%22Earthquake+hazard+analysis%22">Earthquake hazard analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Earthquake+damage%22">Earthquake damage</searchLink><br /><searchLink fieldCode="DE" term="%22Hazards%22">Hazards</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Himalaya+Mountains%22">Himalaya Mountains</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The 2011 Sikkim earthquake (M 6.9) of the Himalaya has shown that a moderate size earthquake may also cause severe damage to the region. Simulated accelerograms using a modified hybrid technique have been generated at spatially distributed 702 points for a moderate size (M 6.9) earthquake in the Sikkim region of Himalaya to evaluate the seismic hazard in the region. The peak ground acceleration (PGA) values and response spectra have been derived from the simulated accelerograms. The synthetic PGA values, corresponding modified mercalli (MM) intensity values and response spectral acceleration values have been contoured to present the scenario hazard maps of the region. A PGA value of 400 cm/s2 has been estimated in the region near the epicentre of the earthquake. The response spectral acceleration values for five periods corresponding to the natural period (T) of single-storey buildings, double-storey buildings, 3–4 storey buildings, tall buildings and high-rise buildings have been obtained. The maximum values of response spectral accelerations estimated in the centre of meizoseismal zone are 1200 cm/s2 (T = 0.1 s), 1800 cm/s2 (T = 0.2 s), 900 cm/s2 (T = 0.5 s), 800 cm/s2 (T = 1.0 s) and 80 cm/s2 (T = 6 s). The decay curves show that PGA values in the west direction are lower as compared to the values in other directions at similar distances. Also, it has been observed that the PGA and spectral acceleration values decay slowly in the west direction compared to other directions. The scenario hazard maps present here are expected to be useful for mitigating seismic hazards from the region as these maps indicate the damage potential due to future moderate size earthquakes in the region. Article Highlights: The application of a modified hybrid technique has been presented to evaluate the seismic hazard based on simulating accelerograms for a moderate size earthquake in the Sikkim region of Himalaya. The synthetic accelerograms have been generated at 702 points distributed spatially on a grid. The scenario hazard maps showing the spatial distribution of PGA values, MM intensity values and response spectral acceleration values at different periods. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Earth System Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s12040-022-01833-0 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 1 Subjects: – SubjectFull: Accelerograms Type: general – SubjectFull: Tall buildings Type: general – SubjectFull: Spectral sensitivity Type: general – SubjectFull: Earthquake hazard analysis Type: general – SubjectFull: Earthquake damage Type: general – SubjectFull: Hazards Type: general – SubjectFull: Himalaya Mountains Type: general Titles: – TitleFull: Evaluating the seismic hazard to Sikkim region of Himalaya using simulated accelerograms. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Yadav, Renu – PersonEntity: Name: NameFull: Kumar, Dinesh IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2022 Type: published Y: 2022 Identifiers: – Type: issn-print Value: 02534126 Numbering: – Type: volume Value: 131 – Type: issue Value: 2 Titles: – TitleFull: Journal of Earth System Science Type: main |
| ResultId | 1 |
