Key Facts
• At 03:22 AM on July 31, the Japan Meteorological Agency issued tsunami observation updates.
• Tsunami height changes may take hours to reach their maximum after initial observation.
• Eastern Hokkaido Pacific Coast: Kushiro observed a maximum wave height of 0.4m at 3:59 PM on July 30.
• Central Hokkaido Pacific Coast: Tokachi Port recorded a maximum wave height of 0.7m at 1:18 AM on July 31.
• Northern Hokkaido Sea of Japan Coast: Wakkanai observed a maximum wave height of 0.4m at 2:18 AM on July 31.
• Iwate Prefecture: Kuji Port recorded the highest wave at 1.3m at 1:52 PM on July 30.
• Miyagi Prefecture: Sendai Port observed a maximum wave height of 0.9m at 11:20 PM on July 30.
• Fukushima Prefecture: Soma recorded a maximum wave height of 0.7m at 9:57 PM on July 30.
• Tokyo Bay: Harumi observed a maximum wave height of 0.2m at 2:15 PM on July 30.
• Tsunami warnings remain in effect for multiple regions, with potential for further height increases.
Summary
The Japan Meteorological Agency issued tsunami observation updates at 03:22 AM on July 31. Tsunami height changes may take hours to reach their maximum, and larger waves than initially observed could still arrive. Key observations include a 1.3m wave at Kuji Port in Iwate Prefecture and a 0.9m wave at Sendai Port in Miyagi Prefecture. Warnings remain in effect across various regions, including Hokkaido, Fukushima, and Tokyo Bay, with the possibility of further height increases. Residents are advised to stay alert and follow safety measures.
