April 21, 1955 Earthquake: Aegean Sea, Greece

Date

April 21, 1955

Time

07:18:00 UTC

Place

Aegean Sea, Greece

Magnitude

6

Intensity

10 on the Modified Mercalli scale

Tsunami

None recorded

Epicenter

39.500° N, 23.000° E

Country

Greece

Deaths

7

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.

• December 856, Korinthos,patrai (Patras), Greece45,000 deaths · 178 km
• July 7, 551, Schisma, Boetia, GreeceM7.1 · 5,000 deaths · 136 km
• June 426 BC, Euboea, GreeceM7.1 · 2,500 deaths · 72 km
• April 20, 1894, Locride, Malesina-Martinon (Lokris), GreeceM6.7 · 255 deaths · 102 km
• September 26, 1932, Hierissos-Strantonion (Chalkidiki), GreeceM6.9 · 161 deaths · 4,106 houses destroyed · 135 km
• September 7, 1999, Athens, GreeceM6 · 143 deaths · $4.2 billion · 53,000 houses destroyed · 162 km
• August 23, 1817, Aeghion, Achaia, GreeceM6.6 · 128 deaths · 153 km
• August 1, 1870, Itea Delphi (Phokis), GreeceM7 · 100 deaths · 119 km
• September 30, 1870, GreeceM7.5 · 100 deaths · 119 km
• June 20, 1978, Thessaloniki, GreeceM6.4 · 50 deaths · $250 million · 139 km
• March 9, 1965, Alonisos, Skopelos, GreeceM6.3 · 38 deaths · $8 million · 87 km
• January 30, 1785, Patrai (Patras), Zakynthos (Zante), Greece38 deaths · 183 km
• April 30, 1954, Sophades (Karditsa), GreeceM6.7 · 31 deaths · $3.2 million · 78 km
• April 27, 1894, St Konstantinos-Arkitsa (Lokris), GreeceM6.9 · 30 deaths · 3,800 houses destroyed · 89 km
• June 15, 1995, Aiyion, Eratini, GreeceM6.5 · 26 deaths · $660 million · 137 km

Significant earthquakes of 1955The 1900sEvery quake the USGS located in 1955Recent 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 4075.