Publication Date:
2018-05-14
Description:
In the seismological literature the 3 January 1117 earthquake represents an interesting
case study, both for the sheer size of the area in which that event is recorded by the
monastic sources of the 12th century, and for the amount of damage mentioned. The
1117 event has been added to the earthquake catalogues of up to five European countries
(Italy, France, Belgium, Switzerland, the Iberian peninsula), and it is the largest historical
earthquake for northern Italy. We have analyzed the monastic time system in the 12th
century and, by means of a comparative analysis of the sources, have correlated the two
shocks mentioned (in the night and in the afternoon of 3 January) to territorial effects,
seeking to make the overall picture reported for Europe more consistent. The connection
between the linguistic indications and the localization of the effects has allowed us to
shed light, with a reasonable degree of approximation, upon two previously little known
earthquakes, probably generated by a sequence of events. A first earthquake in lower
Germany (I0 (epicentral intensity) VII–VIII MCS (Mercalli, Cancani, Sieberg), M 6.4)
preceded the far more violent one in northern Italy (Verona area) by about 12–13 hours.
The second event is the one reported in the literature. We have put forward new parameters
for this Veronese earthquake (Io IX MCS, M 7.0). A third earthquake is independently
recorded in the northwestern area of Tuscany (Imax VII-VIII MCS), but for the latter event
the epicenter and magnitude cannot be evaluated.
Description:
Published
Description:
B12309
Description:
3T. Storia Sismica
Description:
JCR Journal
Keywords:
historical seismology
;
1117
;
northern Italy
;
Tuscany
;
central Europe
;
04.06. Seismology
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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