Archaeoseismology

Archaeoseismology is the study of past earthquakes deriving from the analysis of archaeological sites. Such analyses reveal information about seismic events that have not been historically recorded. Such data can also help to document seismic risk in areas subject to extremely destructive earthquakes. In 1991, an international conference held in Athens marked the beginning of modern research in the field of archaeoseismology, described as a "study of ancient earthquakes, and their social, cultural, historical and natural effects".
The main idea.
Earthquakes that happened during the far past hide a particularly important information for a regional seismic risk assessment. We have quantitative data concerning past earthquakes only from the beginning of the 20 century (as the invention of the seismograph is from the very late 19 century), but humanity is forced to deal with earthquakes since the very beginning of its time. So, we have an extremely limited information to deal with a reliable seismic risk. As a result, a methodology for reconstruction of historical earthquakes was held during the 20 century, but it has brought a very partial results, especially for archaic earthquakes. Then, it became clear, that research in archaeological sites are needed in aim to identify damages or destructions that are Attributable to ancient earthquakes.
Archeological record.
The archaeological record can carry three different types of evidence of seismic activity: