(Oso, WA)  --  Officials say it will be at least Thursday before Highway 530 near Oso, Washington is reopened, following a slow-moving landslide.  Authorities say the slide stopped moving over the weekend, but geologists warn that the land remains unstable.  The slide, which happened near the site of the deadly Oso landslide more than three years ago, prompted the evacuation of eight homes and the shut-down of a three-and-a-half-mile stretch of the highway.  Officials initially said 530 would be ready to reopen today, but the state transportation department said yesterday the instability of the hillside will keep the highway closed until at least Thursday.