Significant earthquakes of 1099

February 22, 1099 Earthquake: Nankaido, Japan

February 22, 1099 · M8.4

A magnitude 8.4 earthquake struck Nankaido, Japan on February 22, 1099. It caused a tsunami.

Map

Where it struck, with the other significant earthquakes within 200 km. Circles are sized and colored by magnitude; select one for its page.

The earthquake

Date
February 22, 1099
Place
Nankaido, Japan
Magnitude
8.4 (Ms)
Epicenter
33.000° N, 135.500° E
Country
Japan

The toll

Damage
Limited (under about $1 million) with its tsunami and other effects

Where the literature gives no number, NCEI records a description on a scale of 1 to 4, printed here in its words. Damage is in millions of US dollars of the year of the event, not adjusted for inflation.

Other significant earthquakes nearby

Within 200 km, the deadliest first.

More

Significant earthquakes of 1099The 1000sRecent earthquakes near hereThis day in weather history

Sources

Significant earthquakes from NOAA’s National Centers for Environmental Information, Global Historical Hazard Database, cited as NCEI/WDS, doi:10.7289/V5PN93H7. Public domain. Read 2026-09-24. NCEI earthquake 7381.