1. Modified-Mercalli intensity distribution for the most significant earthquakes in Alaska, 1899-1981 [cartographic material] Yale Public content 1986. 2002-06-01T04:00:00Z. 2023-10-24T03:01:48Z. Geological Survey (U.S.). The Survey : [Books and Open-file Reports Section, distributor]. English. cartographic image. Public. Alaska.