Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/3873
AuthorsTosi, P.* 
De Rubeis, V.* 
Loreto, V.* 
Pietronero, L.* 
TitleSpace–time correlation of earthquakes
Issue DateJun-2008
Series/Report no.3 / 173 (2008)
DOI10.1111/j.1365-246X.2008.03770.x
URIhttp://hdl.handle.net/2122/3873
Keywordsearthquake clustering
Subject Classification04. Solid Earth::04.06. Seismology::04.06.02. Earthquake interactions and probability 
05. General::05.01. Computational geophysics::05.01.04. Statistical analysis 
AbstractSeismicity is a complex process featuring non-trivial space–time correlations in which several forms of scale invariance have been identified. A frequently used method to detect scale-invariant features is the correlation integral, which leads to the definition of a correlation dimension separately in space and time. In this paper, we generalize this method with the definition of a space–time combined correlation integral. This approach allows us to analyse medium-strong seismicity as a point process, without any distinction among main, after or background shocks. The analyses performed on the catalogue of worldwide seismicity and the corresponding reshuffled version strongly suggest that earthquakes of medium-large magnitude are time clustered inside specific space–time regions. On the basis of this feature, we recognize a space–time domain statistically characterized by sequences' behaviour and a domain of temporal randomness. Then, focusing on the spatial distribution of hypocentres, we find another domain confined to short distances and characterized by a relatively high degree of spatial correlation. This spatial domain slowly increases with time: we interpret this as the ‘afterevent’ zone representing the set of all subsequent events located very near (about 30 km) to each reference earthquake and embedded on specific seismogenic structures such as faults planes.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
SpaceTimeCorrelation_Tosi_GJI.pdfFull article637.98 kBAdobe PDFView/Open
Show full item record

Page view(s)

88
Last Week
0
Last month
0
checked on Sep 19, 2017

Download(s)

22
checked on Sep 19, 2017

Google ScholarTM

Check

Altmetric