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d) a cluster of events located around Brescia, including the event of 1222, Io 11
MCS, Mm 6.8, which appears as the most energetic one of the area;
e) a number of events located west and east of Verona, at the border of the Lessini
Mountains;
f) the event of 1117, Io 10-11 MCS, Mm 6.5, located near the Northern part of the
Lake Garda.
In 1983-1984 the seismicity of the Southern part of the area was the object of a
massive investigation in the framework studies for the sites of the projected nuclear
power plants in Northern Italy (ENEL, 1985).
The seismicity of Valtellina and the of the strongest events of the surrounding
regions in the 13th-20th centuries was studied by CNR in 1987-1988 (Stucchi and
Albini, 1988; see also Albini et al. 1988; Albini et al. 1994a). CNR then updated the
knowledge on the seismicity of Lombardy (Stucchi et al., 1993) and Trentino-Alto
Adige (Albini et al., 1994b). In the framework of these investigations seismological
compilations hitherto not considered were searched, such as Lavizzari (1716) and
Candreia (1905) for Valtellina and the Graubuenden, Tovazzi (1803) and Schorn
(1902) for the provinces of Trento and Bolzano and for Tyrol. A study by Albini
et al. (1996) was performed to assess the informative potential of Schorn (1902)
with respect to the seismicity of the historical Tyrol.
2.3 Relocating and Resizing Earthquakes
Some events were given more reliable location and size. As for the location, the
earthquake of 1276 was known in Postpischl (1985a) as located near Milano, Io
8 MCS, Mm 5.2. ENEL (1985) studied this event together with two others: (i)
one reported near Asti, Piedmont, without damage by a reliable source (Ventura,
14th cent.); (ii) the other one reported by Dalla Corte (1592-1594) as happened on
1277, July 28, with damage to the buildings, although this information could not be
supported by other sources. The final result was that the three events are just one
earthquake, to be located somewhere south-east of Milano, with Io as great as 6
MCS (ENEL, 1985).
The event of 1267 was found to have little to do with Verona and relocated in
Austria (ENEL, 1985), where the national catalogue already listed it. In a sim-
ilar way another, although smaller event in the Postpischl catalogue, the one of
1295 near Bergamo (Io 7 MCS), was found to represent nothing else than the ef-
fects of a strong earthquake occurred in the region of Chur, Switzerland (Albini
et al., 1994a). The “Bergamo”, 1295 event had actually been built up from a lim-
ited dataset based on Italian sources only, derived from Baratta (1901). It must
be said that this was not the only case in the area: in a similar way a later event
of 1670 near Verona was built on the far field effects of a strong earthquake in
Tyrol (Guidoboni and Stucchi, 1993). Similarly, the Postpischl catalogue (1985a)
located two small earthquakes (Io 4 MCS in both cases) at Menaggio (1943) and
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