Reviewed by USGSGreece94y ago
M6.4 earthquake 14 km E of Kardámaina, Greece
Sunday, April 23, 1933, 05:57:34 UTC · 36.759°N, 27.299°E
A magnitude 6.4 earthquake struck 14 km E of Kardámaina, Greece on Sunday, April 23, 1933, 05:57:34 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M7.0 on June 26, 1926.
- Magnitude
- 6.4
- Strong · mw
- Depth
- 15 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- VII
- Very strong (ShakeMap)
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquakeColoured lines: estimated shaking intensity (USGS ShakeMap)
In context
How big was it, and why here?
Energy released
67 kilotons of TNT
That is about 4 times the Hiroshima bomb. It released about 140 times the energy of a magnitude 5.0.
Tectonic setting
100 km
from the nearest mapped plate boundary, between the Aegean Sea and Anatolian plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: shallow
15 km
Shallow earthquakes (under 70 km) produce the strongest surface shaking for their size, so they are the ones most likely to cause damage near the epicenter.
Did You Feel It?
Where it was felt
No “Did You Feel It?” reports have been published for this event yet. If you felt it, you can add your report on the USGS website.
I felt it — report to USGS ↗USGS PAGER estimate
Who was exposed to shaking
USGS publishes PAGER impact estimates for significant earthquakes, usually within an hour. No PAGER estimate is available for this event.
After the main event
Aftershocks within 100 km
USGS has not published any M2.5+ earthquake within 100 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 68 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.115 km WSW of Burdur, TurkeyOctober 3, 1914 · 270 km NE of this epicenter
- 7.03 km ESE of Soma, TurkeyNovember 18, 1919 · 271 km N of this epicenter
- 7.05 km NNW of Kéfalos, GreeceJune 26, 1926 · 33 km W of this epicenter
- 6.815 km SSW of Kaş, TurkeyMarch 18, 1926 · 220 km E of this epicenter
- 6.733 km SE of Karpathos, GreeceAugust 13, 1922 · 160 km S of this epicenter
- 6.4TurkeyMarch 31, 1928 · 169 km N of this epicenter
- 6.452 km SSE of Fry, GreeceAugust 11, 1922 · 197 km S of this epicenter
- 6.14 km SE of Megálo Chorió, GreeceAugust 11, 1904 · 78 km N of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 45 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 34,167 recorded deaths. The most severe:
- 1883M7.3
Ayvalik, Izmir, Cesme
15 Oct 1883 · 197 km away · intensity X
15,000 deathsExtreme damage ($25M+)
- 1881M7.3
Khios; Turkey: Cesme
3 Apr 1881 · 190 km away · intensity XI
7,866 deathsExtreme damage ($25M+)tsunami
- 1914M7.0
Burdur, Kilinc, Keciborlu, Isparta
3 Oct 1914 · 288 km away · intensity IX
4,000 deathsExtreme damage ($25M+)
- 1810
Crete: Iraklion (Candia)
16 Feb 1810 · 249 km away · intensity X
3,000 deathsSevere damage ($5–24M)tsunami
- 1875M7.3
Capali, Dinar, Civril, Yaka
3 May 1875 · 296 km away · intensity X
1,300 deathsExtreme damage ($25M+)
- 1899M6.7
Sultanhisar,Atca,Nazilli,Kuyucak,Denizli
20 Sep 1899 · 188 km away · intensity IX
1,117 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.