The 1976 Guatemala Earthquake: ESI Scale and Probabilistic/Deterministic Seismic Hazard Analysis Approaches
A hazard assessment of the 1976 Guatemala earthquake (M = 7.5) was conducted to achieve a better definition of the seismic hazard. The assessment was based on the environmental effects that had effectively contributed to the high destructive impact of that event. An interdisciplinary approach was ad...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-09-01
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| Series: | Geosciences |
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| Online Access: | https://www.mdpi.com/2076-3263/9/9/403 |
| _version_ | 1819290217707732992 |
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| author | Mauro Caccavale Marco Sacchi Efisio Spiga Sabina Porfido |
| author_facet | Mauro Caccavale Marco Sacchi Efisio Spiga Sabina Porfido |
| author_sort | Mauro Caccavale |
| collection | DOAJ |
| description | A hazard assessment of the 1976 Guatemala earthquake (M = 7.5) was conducted to achieve a better definition of the seismic hazard. The assessment was based on the environmental effects that had effectively contributed to the high destructive impact of that event. An interdisciplinary approach was adopted by integrating: (1) historical data; (2) co-seismic geological effects in terms of Environmental Seismic Intensity (ESI) scale intensity values; and (3) ground shaking data estimated by a probabilistic/deterministic approach. A detailed analysis of primary and secondary effects was conducted for a set of 24 localities, to obtain a better evaluation of seismic intensity. The new intensity values were compared with the Modified Mercalli Intensity (MMI) and Peak Ground Acceleration (PGA) distribution estimated using a probabilistic/deterministic hazard analysis approach for the target area. Our results are evidence that the probabilistic/deterministic hazard analysis procedures may result in very different indications on the PGA distributions. Moreover, PGA values often display significant discrepancy from the macroseismic intensity values calculated with the ESI scale. Therefore, the incorporation of the environmental earth effects into the probabilistic/deterministic hazard analysis appears to be mandatory in order to achieve a more accurate seismic estimation. |
| first_indexed | 2024-12-24T03:19:14Z |
| format | Article |
| id | doaj.art-303b1b12e6bc404cb851255cb3ab91d0 |
| institution | Directory Open Access Journal |
| issn | 2076-3263 |
| language | English |
| last_indexed | 2024-12-24T03:19:14Z |
| publishDate | 2019-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Geosciences |
| spelling | doaj.art-303b1b12e6bc404cb851255cb3ab91d02022-12-21T17:17:33ZengMDPI AGGeosciences2076-32632019-09-019940310.3390/geosciences9090403geosciences9090403The 1976 Guatemala Earthquake: ESI Scale and Probabilistic/Deterministic Seismic Hazard Analysis ApproachesMauro Caccavale0Marco Sacchi1Efisio Spiga2Sabina Porfido3CNR-ISMAR, Calata Porta di Massa, Interno Porto, 80133 Napoli, ItalyCNR-ISMAR, Calata Porta di Massa, Interno Porto, 80133 Napoli, ItalyIndependent Researcher, 83100 Avellino, ItalyINGV-Osservatorio Vesuviano, 80133 Napoli, ItalyA hazard assessment of the 1976 Guatemala earthquake (M = 7.5) was conducted to achieve a better definition of the seismic hazard. The assessment was based on the environmental effects that had effectively contributed to the high destructive impact of that event. An interdisciplinary approach was adopted by integrating: (1) historical data; (2) co-seismic geological effects in terms of Environmental Seismic Intensity (ESI) scale intensity values; and (3) ground shaking data estimated by a probabilistic/deterministic approach. A detailed analysis of primary and secondary effects was conducted for a set of 24 localities, to obtain a better evaluation of seismic intensity. The new intensity values were compared with the Modified Mercalli Intensity (MMI) and Peak Ground Acceleration (PGA) distribution estimated using a probabilistic/deterministic hazard analysis approach for the target area. Our results are evidence that the probabilistic/deterministic hazard analysis procedures may result in very different indications on the PGA distributions. Moreover, PGA values often display significant discrepancy from the macroseismic intensity values calculated with the ESI scale. Therefore, the incorporation of the environmental earth effects into the probabilistic/deterministic hazard analysis appears to be mandatory in order to achieve a more accurate seismic estimation.https://www.mdpi.com/2076-3263/9/9/403georiskprobabilistic seismic hazardESI scaleground-shaking mapGuatemalamacroseismic intensity |
| spellingShingle | Mauro Caccavale Marco Sacchi Efisio Spiga Sabina Porfido The 1976 Guatemala Earthquake: ESI Scale and Probabilistic/Deterministic Seismic Hazard Analysis Approaches Geosciences georisk probabilistic seismic hazard ESI scale ground-shaking map Guatemala macroseismic intensity |
| title | The 1976 Guatemala Earthquake: ESI Scale and Probabilistic/Deterministic Seismic Hazard Analysis Approaches |
| title_full | The 1976 Guatemala Earthquake: ESI Scale and Probabilistic/Deterministic Seismic Hazard Analysis Approaches |
| title_fullStr | The 1976 Guatemala Earthquake: ESI Scale and Probabilistic/Deterministic Seismic Hazard Analysis Approaches |
| title_full_unstemmed | The 1976 Guatemala Earthquake: ESI Scale and Probabilistic/Deterministic Seismic Hazard Analysis Approaches |
| title_short | The 1976 Guatemala Earthquake: ESI Scale and Probabilistic/Deterministic Seismic Hazard Analysis Approaches |
| title_sort | 1976 guatemala earthquake esi scale and probabilistic deterministic seismic hazard analysis approaches |
| topic | georisk probabilistic seismic hazard ESI scale ground-shaking map Guatemala macroseismic intensity |
| url | https://www.mdpi.com/2076-3263/9/9/403 |
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