What to know

• Authorities revised up the death toll from a powerful 7.0 magnitude quake in Kumamoto prefecture in southwestern Japan to 34, with another 89 injured.S1
• Japan is one of the world's most seismically active countries, sitting on top of four major tectonic plates along the western edge of the Pacific "Ring of Fire."S2
• The death toll from a strong earthquake that struck southwestern Japan climbed to 14 on Wednesday.S3