Review of Historical Earthquakes in the Lower Middle Ages: Earthquakes of the XIV and XV Centuries in Catalonia (NE Spain) - Historical Seismology: Interdisciplinary Studies of Past and Recent Earthquakes - page 142

Fig. 1 Macroseismic epicentres for the earthquakes of the XIV and XV centuries, with Io > VI

2 From Historical Sources to Earthquakes Parameters

Our research into contemporary sources has yielded a large volume of documents
some of which are new and contain accurate descriptions. A rigorous analysis of
the historical sources and context has enabled us to interpret older documents in a
different perspective with respect to earlier studies.
In order to obtain the most reliable evaluation of the earthquakes, only primary
sources - those contemporary to the events - have been used. Occasionally, sec-
ondary sources - non contemporary to the events but clearly derived from former
primary sources - were considered in accordance with the context and type of
source.
The Geological Survey of Catalonia has established an archive collection, which
includes microfilms and photocopies of the documentation consulted. The