On December 30, 1703 CE, a tsunami struck off the southwest Boso Peninsula in Japan. According to the official historical record from the NOAA/NCEI Global Historical Tsunami Database, the event was associated with an earthquake and resulted in significant loss of life.
Event Overview and Measurements
The tsunami occurred at 17.00 hours on December 30, 1703 CE, with its epicenter located at latitude 34.7 and longitude 139.8 off the southwest Boso Peninsula (location ID 367). The associated earthquake reached a magnitude of 8.2. Official records assign the event a validity of 4, indicating a definite tsunami occurrence.
Measurements for the event documented a maximum water height of 11.7 meters. The disaster caused 5,233 deaths.
Frequently asked questions
When did the 1703 tsunami occur off the southwest Boso Peninsula?
The tsunami off the southwest Boso Peninsula occurred on December 30, 1703 CE.
What were the earthquake magnitude and maximum water height for this event?
The associated earthquake had a magnitude of 8.2, and the maximum water height recorded was 11.7 meters.
How many fatalities were recorded in the 1703 Boso Peninsula tsunami?
The official historical database records 5,233 deaths resulting from this tsunami event.
Sources and further context
Official datasets support the event-specific facts.