In:
Earthquake Spectra, SAGE Publications, Vol. 20, No. 1_suppl ( 2004-07), p. 23-37
Abstract:
Two M w 5.7 earthquakes struck a sparsely populated region of southern Italy, on October 31 and November 1, triggering a swarm-like sequence that lasted for several days. The earthquakes were caused by pure right-lateral slip between 10 and 24 km depth over a nearly vertical, previously undetected east-west fault. This mechanism is not typical for southern Italy, where normal faulting in the uppermost 12 km of the crust seems to dominate. However, east-west strike-slip faulting is kinematically consistent with the widely documented Apennines extension. The earthquake-causative fault appears to connect the Mattinata fault, a major active strike-slip feature cutting across the Gargano promontory, with east-west structures known beneath the axial part of the Apennines. The 2002 earthquakes thus highlighted a mode of earthquake release that may explain several large yet poorly understood historical earthquakes (e.g., 1361, 1456, 1731, 1930) located between the crest of the Apennines and the Adriatic coastline.
Type of Medium:
Online Resource
ISSN:
8755-2930
,
1944-8201
Language:
English
Publisher:
SAGE Publications
Publication Date:
2004
detail.hit.zdb_id:
2183411-8
SSG:
16,13
