Latest death toll from Tuesday 's quake , tsunami stands at 139 . Score: 6 Quake does not trigger a tsunami warning , Pacific Tsunami Warning Center says . Huge rescue effort under way in Samoan islands amid fears death toll could rise .
Latest death toll from Tuesday 's quake , tsunami stands at 139 . Second quake -- magnitude 5.5 -- shook Samoan islands region Wednesday . Quake does not trigger a tsunami warning , Pacific Tsunami Warning Center says . Huge rescue effort under way in Samoan islands amid fears death toll could rise .