Japan Meteorological Agency's earthquake and tsunami observations division director Gen Aoki speaks next to screens showing the seismic event was indicated on North Korea and observed in Japan at the Japan Meteorological Agency in Tokyo

Japan Meteorological Agency's earthquake and tsunami observations division director Gen Aoki speaks next to screens showing the seismic event was indicated on North Korea and observed in Japan at the Japan Meteorological Agency in Tokyo

Japan Meteorological Agency's earthquake and tsunami observations division director Gen Aoki speaks next to screens showing the seismic event was indicated on North Korea and observed in Japan during a news conference at the Japan Meteorological Agency in Tokyo, Japan, September 9, 2016.   REUTERS/Kim Kyung-Hoon
Students sit on a playground of a school in Yanji, Jilin Province, China as they are evacuated after a seismic event in North Korea, September 9, 2016. REUTERS/Stringer
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