Key Facts
• Japan Meteorological Agency issued tsunami observation info at 11:17 PM, July 30.
• Tsunami height may increase beyond observed levels; maximum waves may take hours to arrive.
• Observations as of 11:12 PM:
– Eastern Hokkaido Pacific Coast: Nemuro City, max height 0.8m at 2:57 PM.
– Central Hokkaido Pacific Coast: Erimo Town, max height 0.6m at 9:14 PM.
– Western Hokkaido Pacific Coast: Tomakomai East Port, max height 0.5m at 7:04 PM.
– Aomori Prefecture: Hachinohe Port, max height 0.8m at 7:16 PM.
– Iwate Prefecture: Kuji Port, max height 1.3m at 1:52 PM.
– Miyagi Prefecture: Sendai Port, max height 0.8m at 9:29 PM.
– Fukushima Prefecture: Soma, max height 0.7m at 9:57 PM.
– Chiba Prefecture: Tateyama City, max height 0.6m at 8:05 PM.
– Tokyo Bay: Yokohama, max height 0.3m at 1:40 PM.
– Kochi Prefecture: Muroto Cape, max height 0.6m at 10:51 PM.
Summary
The Japan Meteorological Agency released tsunami observation updates at 11:17 PM on July 30. Tsunami waves may take hours to reach their maximum height, and some areas could experience waves higher than initially observed. Key observations include a 1.3m wave at Kuji Port, Iwate Prefecture, and 0.8m waves at Nemuro City, Hokkaido, and Hachinohe Port, Aomori Prefecture. Residents in affected areas are advised to remain cautious as conditions may change.
