September 25, 477 Earthquake: Istanbul (Constantinople), Turkey

Date

September 25, 477

Place

Istanbul (Constantinople), Turkey

Intensity

10 on the Modified Mercalli scale

Tsunami

None recorded

Epicenter

41.000° N, 29.000° E

Country

Turkey

Deaths

Many (about 101 to 1,000)

Damage

Severe (about $5 to $25 million)

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.

• August 17, 1999, Istanbul, Kocaeli, Sakarya, TurkeyM7.6 · 17,118 deaths · $20 billion · 86 km
• May 25, 1719, Turkey6,000 deaths · 40 km
• September 10, 1509, Istanbul, TurkeyM7.7 · 5,000 deaths · 1,700 houses destroyed · 79 km
• May 22, 1766, TurkeyM6.5 · 4,000 deaths · 22 km
• August 9, 1912, Marmara Sea, TurkeyM7.2 · 2,800 deaths · 24,700 houses destroyed · 161 km
• February 28, 1855, Tayabas, Bursa, TurkeyM6.7 · 2,200 deaths · 89 km
• September 2, 1754, Izmit, TurkeyM6.8 · 2,000 deaths · 28 km
• July 10, 1894, TurkeyM6.7 · 1,349 deaths · 51 km
• April 29, 1855, Bursa, TurkeyM6.7 · 1,300 deaths · 89 km
• March 18, 1953, Yenice, Onon, TurkeyM7.3 · 1,070 deaths · $3.6 million · 146 km
• October 11, 367, Iznik,nicaea, Turkey1,000 deaths · 68 km
• November 12, 1999, Bolu-Duzce-Kaynasli, Adapazari, Zonguldak, TurkeyM7.2 · 894 deaths · $1 billion · 184 km
• May 12, 1866, Goynuk, TurkeyM7.2 · 675 deaths · 2,400 houses destroyed · 167 km
• April 11, 1855, Bursa, Turkey400 deaths · 89 km
• June 20, 1943, Hendek, Adapazari, TurkeyM6.4 · 285 deaths · 140 km

Significant earthquakes of 477The 400sRecent earthquakes near hereThis day in weather history

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 119.