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A magnitude 7.7 earthquake occurred in the Gilan Province between the towns of Rudbar
and Manjil in northern Iran on Thursday, June 21, 1990 (June 20 at 21:00 GMT). The
event, the largest ever to be recorded in that part of the Caspian Sea region, may
have been composed of two or more closely-spaced earthquakes occurring in rapid succession.
These quakes, exceptionally close to the surface for this region, were also unusually
destructive. |