Publication Date:
2022-04-05
Description:
We integrate paleoseismic data sets along the Mt. Vettore‐Mt. Bove normal fault system
rupturing at the surface in the 30 October 2016 Norcia earthquake. Through the analysis of new trenches
from this work and a review of the preexisting data, we correlate events among trench sites along antithetic
and synthetic fault splays. We recognize seven M 6.5, 2016 Norcia‐type (or larger) surface‐faulting events in
the last ~22 kyr, including 2016. Before 2016, one event occurred in the past two millennia (260–575 CE)
and possibly corresponds to the event damaging Rome in 443 or 484/508 CE. Three previous events occurred
between 10590 and 415 BCE, whereas the two oldest ones date between 19820 and 16540 BCE. The
average recurrence time is 3,360–3,640 years for the last ~22 kyr and 1,220–1,970 years for the last ~4 kyr. We
infer a minimum dip‐slip rate of 0.26–0.38 mm/year on the master fault in the central portion of the Mt.
Vettore–Mt. Bove normal fault system and a dip‐slip rate of at least 0.10 mm/year on the southernmost
portion. We infer a Middle–Late Pleistocene inception of the long‐term scarp of the investigated splays. The
along‐strike variation of slip rates well reproduces the trend of the 2016 surface slip; thus, the time window
exposed in the trenches is representative for the present fault activity. Based on trenching data, different
earthquake rupture scenarios should be also considered for local hazard assessment.
Description:
Published
Description:
9021-9048
Description:
4T. Sismicità dell'Italia
Description:
5T. Sismologia, geofisica e geologia per l'ingegneria sismica
Description:
6T. Studi di pericolosità sismica e da maremoto
Description:
7A. Geofisica per il monitoraggio ambientale
Description:
4IT. Banche dati
Description:
JCR Journal
Keywords:
We integrate paleoseismic datasets along the Mt. Vettore‐Mt. Bove normal fault system rupturing on 30 October 2016, M6.5, Norcia Earthquake
;
Seven surface faulting events ruptured the Mt. Vettore‐Mt. Bove fault system in the past ~22 kyr
;
Paleoseismologic slip rates, recurrence intervals, and rupture scenarios contribute to the understanding of seismogenic processes in central Apennines
;
04. Solid Earth
;
04.04. Geology
;
04.06. Seismology
;
04.07. Tectonophysics
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
Permalink