Bollettino di Geofisica Teorica e Applicata
OGS Website
About the Journal
Contacts
To Authors
On-line Submission
Subscriptions
Forthcoming
On-line First
The Historical First Issue
Issues

2022 Vol. 63
1 / 2 / 3

2021 Vol. 62
1 / 2 / 3 / 4 / Suppl. 1 / Suppl. 2 / Suppl. 3

2020 Vol. 61
1 / 2 / 3 / 4 / Suppl. 1

2019 Vol. 60
1 / 2 / 3 / 4 / Suppl. 1 / Suppl. 2 / Suppl. 3

2018 Vol. 59
1 / 2 / 3 / 4 / Suppl. 1

2017 Vol. 58
1 / 2 / 3 / 4

2016 Vol. 57
1 / 2 / 3 / 4 / Suppl. 1

2015 Vol. 56
1 / 2 / 3 / 4

2014 Vol. 55
1 / 2 / 3 / 4

2013 Vol. 54
1 / 2 / 3 / 4 / Suppl. 1 / Suppl. 2

2012 Vol. 53
1 / 2 / 3 / 4

2011 Vol. 52
1 / 2 / 3 / 4 / Suppl. 1

2010 Vol. 51
1 / 2-3 / 4 / Suppl. 1

2009 Vol. 50
1 / 2 / 3 / 4

2008 Vol. 49
1 / 2 / 3-4 / Suppl. 1

2007 Vol. 48
1 / 2 / 3 / 4

2006 Vol. 47
1-2 / 3 / 4

2005 Vol. 46
1 / 2-3 / 4

2004 Vol. 45
1-2 / 3 / 4 / Suppl. 1 / Suppl. 2

2003 Vol. 44
1 / 2 / 3-4

2002 Vol. 43
1-2 / 3-4

2001 Vol. 42
1-2 / 3-4

2000 Vol. 41
1 / 2 / 3-4

1999 Vol. 40
1 / 2 / 3-4

1998 Vol. 39
1 / 2 / 3 / 4

1997 Vol. 38
1-2 / 3-4

1995 Vol. 37
145 / 146 / 147 / 148 / Suppl. 1

1994 Vol. 36
141-144 / Suppl. 1

1993 Vol. 35
137-138 / 139 / 140

1992 Vol. 34
133 / 134-135 / 136

1991 Vol. 33
129 / 130-131 / 132

 
 

Vol. 35, n.139, September 1993
pp. 349 - 362

Preliminary results from stress tensor inversion of earthquake fault-plane solutions in the southern tyrrhenian region

G. Neri and M. Wyss

Abstract

The method of Gephart and Forsyth (1984) for stress tensor inversion from earthquake faultplane solutions has been applied to 39 crustal seismic events from the region which includes Southern Calabria, Northeastern Sicily and the Aeolian Islands. We conclude that the stress tensor directions are not uniform in the study area because the misfit of the inversion is large if the entire data set is used, but the misfits for inversion of data from sub-regions are small. This result is expected on the basis of the geodynamic information available for the area. Inversion for the stress tensor in separate sub-volumes, defined according to the main structural features of the area, shows that the directions of the greatest principal stress vary from near vertical in Calabria to near horizontal with a strike of N2OE in eastern Sicily. These "best models" agree with geologic and tectonic data. At present, the difference in stress directions between the sub-volumes studied can only be asserted at a confidence level between 50% and 75%. due to the low number of earthquakes suitable far the application of the inversion procedure in each sub-volume. Far this reason, the stress space variation in the Southern Tyrrhenian region needs to be the subject of further investigations with richer data samples, but the present work is a useful basis far them, and far network improvements aimed at a development of this research topic.

Download PDF complete



back to table of contents