NEW : Quake followed by 6.4 aftershocks , the largest reaching 6.4 . 4.8 quake rocks southern Taiwan at more than 15 GMT ; no immediate reports of deaths . Did you feel it ? Quake hits northwest of Taitung , on the southeast coast . Residents in southern Taitung report blackouts ; train services disrupted .
NEW : Quake followed by 6.4 aftershocks , the largest reaching 6.4 . 4.8 quake rocks southern Taiwan at more than 15 GMT ; no immediate reports of deaths . Quake hits northwest of Taitung , on the southeast coast . Residents in southern Taitung report blackouts ; train services disrupted .