Figure D1. Characteristics of data accuracy:
a–d: Histograms of the 2nd decimal digit in latitude value: (a) Romanian data for the 1986 event, the values 0 and 5 are dominating; (b) Romanian data for the 1990 (main) event; (c) Bulgarian data for the 1940 event; (d) Ukrainian data for the 1977 event,
e: histogram of distances between the nearest IDPs in Romanian data, reported in different IDP-maps; number of names: 234, number of IDPs: 1703.