Time-clustering analysis of the 1978–2008 sub-crustal seismicity of Vrancea region
The analysis of time-clustering behaviour of the sub-crustal seismicity (depth larger than 60 km) of the Vrancea region has been performed. The time span of the analyzed catalogue is from 1978 to 2008, and only the events with a magnitude of <i>M</i><sub>w&a...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2011-08-01
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| Series: | Natural Hazards and Earth System Sciences |
| Online Access: | http://www.nat-hazards-earth-syst-sci.net/11/2335/2011/nhess-11-2335-2011.pdf |
| _version_ | 1818586463844958208 |
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| author | L. Telesca V. Alcaz R. Burtiev I. Sandu |
| author_facet | L. Telesca V. Alcaz R. Burtiev I. Sandu |
| author_sort | L. Telesca |
| collection | DOAJ |
| description | The analysis of time-clustering behaviour of the sub-crustal seismicity (depth larger than 60 km) of the Vrancea region has been performed. The time span of the analyzed catalogue is from 1978 to 2008, and only the events with a magnitude of <i>M</i><sub>w</sub> ≥ 3 have been considered. The analysis, carried out on the full and aftershock-depleted catalogues, was performed using the Allan Factor (AF) that allows the identificatiion and quantification of correlated temporal structures in temporal point processes. Our results, whose significance was analysed by means of two methods of generation of surrogate series, reveal the presence of time-clustering behaviour in the temporal distribution of seismicity data of the full catalogue. The analysis performed on the aftershock-depleted catalogue indicates that the time-clustering is associated mainly to the aftershocks generated by the two largest events occurred on 30 August 1986 (<i>M</i><sub>w</sub> = 7.1) and 30 May 1990 (<i>M</i><sub>w</sub> = 6.9). |
| first_indexed | 2024-12-16T08:53:22Z |
| format | Article |
| id | doaj.art-425bd1c4819343a085b68e371c0f7974 |
| institution | Directory Open Access Journal |
| issn | 1561-8633 1684-9981 |
| language | English |
| last_indexed | 2024-12-16T08:53:22Z |
| publishDate | 2011-08-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Natural Hazards and Earth System Sciences |
| spelling | doaj.art-425bd1c4819343a085b68e371c0f79742022-12-21T22:37:21ZengCopernicus PublicationsNatural Hazards and Earth System Sciences1561-86331684-99812011-08-011182335234010.5194/nhess-11-2335-2011Time-clustering analysis of the 1978–2008 sub-crustal seismicity of Vrancea regionL. TelescaV. AlcazR. BurtievI. SanduThe analysis of time-clustering behaviour of the sub-crustal seismicity (depth larger than 60 km) of the Vrancea region has been performed. The time span of the analyzed catalogue is from 1978 to 2008, and only the events with a magnitude of <i>M</i><sub>w</sub> ≥ 3 have been considered. The analysis, carried out on the full and aftershock-depleted catalogues, was performed using the Allan Factor (AF) that allows the identificatiion and quantification of correlated temporal structures in temporal point processes. Our results, whose significance was analysed by means of two methods of generation of surrogate series, reveal the presence of time-clustering behaviour in the temporal distribution of seismicity data of the full catalogue. The analysis performed on the aftershock-depleted catalogue indicates that the time-clustering is associated mainly to the aftershocks generated by the two largest events occurred on 30 August 1986 (<i>M</i><sub>w</sub> = 7.1) and 30 May 1990 (<i>M</i><sub>w</sub> = 6.9).http://www.nat-hazards-earth-syst-sci.net/11/2335/2011/nhess-11-2335-2011.pdf |
| spellingShingle | L. Telesca V. Alcaz R. Burtiev I. Sandu Time-clustering analysis of the 1978–2008 sub-crustal seismicity of Vrancea region Natural Hazards and Earth System Sciences |
| title | Time-clustering analysis of the 1978–2008 sub-crustal seismicity of Vrancea region |
| title_full | Time-clustering analysis of the 1978–2008 sub-crustal seismicity of Vrancea region |
| title_fullStr | Time-clustering analysis of the 1978–2008 sub-crustal seismicity of Vrancea region |
| title_full_unstemmed | Time-clustering analysis of the 1978–2008 sub-crustal seismicity of Vrancea region |
| title_short | Time-clustering analysis of the 1978–2008 sub-crustal seismicity of Vrancea region |
| title_sort | time clustering analysis of the 1978 2008 sub crustal seismicity of vrancea region |
| url | http://www.nat-hazards-earth-syst-sci.net/11/2335/2011/nhess-11-2335-2011.pdf |
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