GREENLAND'S RULING SOCIALIST Siumut Party of home-rule premier Jonathan Motzfeldt seemed set to retain power Wednesday following general elections on the world's largest island, according to official prognoses. . . . A STRONG EARTHQUAKE Wednesday jolted southeastern Sumatra, damaging some houses and sending panicked residents into the streets. There were no immediate reports of casualties. . . . THE JOBLESS RATE in eastern Germany hit another record-high in February, rising to 8.9 percent from 8.6 percent in January.