Over 1,600 quakes won't raise megaquake risk, experts say NipponTV 0 29 07.09 06:00 https://www.youtube.com/watch?v=cN3PS5ughnw + 6 https://www.youtube.com/feeds/videos.xml?channel_id=UCJD2Br_xC-3vY4nkJ… + 7 Over 1,600 quakes won't raise megaquake risk, experts say