September 12, 664 Earthquake: Kyongju, South Korea
A magnitude 7 earthquake struck Kyongju, South Korea on September 12, 664.
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
- September 12, 664
- Place
- Kyongju, South Korea
- Magnitude
- 7
- Intensity
- 9 on the Modified Mercalli scale
- Tsunami
- None recorded
- Epicenter
- 35.500° N, 129.100° E
- Country
- South Korea
The toll
- Damage
- Severe (about $5 to $25 million)
- Houses destroyed
- Many (101 to 1,000)
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.
What the record says
NCEI’s account, from the sources it cites.
houses ruined, especially in the south (reference #14368)
Other significant earthquakes nearby
Within 200 km, the deadliest first.
- April 16, 1700, Tsushima, Nagasaki Prefecture, Japan
- 780, Kyongju, South Korea
- August 12, 1664, Chonju,chinan, South Korea
- September 12, 2016, Gyeongju, South Korea
- October 304, Kyongju, South Korea
- June 510, Kyongju, South Korea
- December 100, Kyongju, South Korea
- 123, Kyongju, South Korea
- July 25, 1643, Sea of Japan, South Korea
- March 2, 1553, Kyongsang-Do, South Korea
- November 15, 2017, Pohang, South Korea
- July 3, 1936, South Korea
More
Significant earthquakes of 664The 600sRecent 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 160.