Why Japan stayed on tsunami alert for 30+ hours after Kamchatka quake NipponTV 0 45 2025.08.15 14:44 https://www.youtube.com/watch?v=YYPzawsaqvk + 9 https://www.youtube.com/feeds/videos.xml?channel_id=UCJD2Br_xC-3vY4nkJ… + 8 Why Japan stayed on tsunami alert for 30+ hours after Kamchatka quake