123 Earthquake: Kyongju, South Korea
A magnitude 6.3 earthquake struck Kyongju, South Korea in 123. 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
- 123
- Place
- Kyongju, South Korea
- Magnitude
- 6.3 (Ms)
- Intensity
- 8 on the Modified Mercalli scale
- Tsunami
- Yes: the tsunami it caused
- Epicenter
- 35.800° N, 129.200° E
- Country
- South Korea
The toll
- Damage
- Limited (under about $1 million)
- Houses destroyed
- Some (about 51 to 100)
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.
123, Kyongju, magnitude 6.3, intensity VIII, Houses destroyed, water developed. (reference #1213)
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
- December 100, Kyongju, South Korea
- November 15, 2017, Pohang, South Korea
- October 304, Kyongju, South Korea
- June 510, Kyongju, South Korea
- September 12, 664, Kyongju, South Korea
- March 2, 1553, Kyongsang-Do, South Korea
- July 25, 1643, Sea of Japan, South Korea
- July 3, 1936, South Korea
- June 12, 1681, Yangyang, Sanchok, South Korea
More
Significant earthquakes of 123The 100sRecent earthquakes near here
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 65.