(AGI) Tokyo, Sept 16 - Eastern Japan experienced an earthquakemeasuring 5.6 on the Richter scale on Tuesday, which was feltas far as Tokyo. No damage or tsunami alerts were reported. Theepicentre was in the prefecture of Ibaraki, northeast of thecapital, at a depth of 50 kilometres. No irregularities werereported at the three nuclear plants in the east of thecountry. . .