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Do earthquake storms repeat in the Apennines of Italy?
Language
English
Status
Published
JCR Journal
JCR Journal
Title of the book
Issue/vol(year)
5/23(2011)
ISSN
0954-4879
Electronic ISSN
1365-3121
Publisher
Wiley-Blackwell
Pages (printed)
300–306
Issued date
2011
Keywords
Abstract
Series of multiple main shocks that develop on adjacent faults is a typical way in which active extension is accommodated in the Apennines of Italy. This behaviour is explained by fault interaction that occurs at a scale ranging from seconds to days, yielding a space–time clustering of earthquakes, termed as earthquake storms. We show that the seismic energy released by historical earthquakes in central Apennines is clustered into two main small time periods, around 600 and 300 years ago, during which a great portion of the normal faulting belt failed. We favour the hypothesis that clustering results from sudden input of deep fluids into the brittle upper crust. The roughly 300 years periodicity and the 3–4 mm year−1 of tectonic extension suggest that earthquake storms need to be taken into account in seismic hazard scenarios.
Type
article
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Size
16 B
Format
Text
Checksum (MD5)
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