 Later, Nizari Isma'ili "da'i" made inroads and eventually established an Assassin stronghold.In the era of Nader Shah Afshar, groups from the Kurds of Quchan and areas of northern Khorassan also settled there.Rudbar was near the epicenter of the 1990 Manjil–Rudbar earthquake of magnitude 7.3 on the Richter scale (MS=7.7, MW=7.3, mb=6.4) at 12