The first known isoseismal map was produced for the 1810 earthquake in Mór in Hungary , and published by Kitaibel and Tomtsányi in 1814 . The first , six-level intensity scale was proposed by Egen in 1828 for an earthquake in Rhineland . Robert Mallet coined the term ' isoseismal ' and produced a map for the 1857 Basilicata earthquake with a threefold intensity scale and used this and other information to identify the epicentral area ( a term he also coined ) . Later studies made use of similar techniques , the main changes being to the actual seismic intensity scale employed
1857 Basilicata earthquake
1857 Basilicata earthquake
Isoseismal map