Reviewed by USGSTurkey117y ago
M5.6 earthquake 7 km N of Datça, Turkey
Sunday, April 30, 1911, 20:42:27 UTC · 36.803°N, 27.683°E
A magnitude 5.6 earthquake struck 7 km N of Datça, Turkey on Sunday, April 30, 1911, 20:42:27 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M6.1 on April 4, 1911.
- Magnitude
- 5.6
- Moderate · mw
- Depth
- 15 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- —
- No ShakeMap
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquake
In context
How big was it, and why here?
Energy released
4 kilotons of TNT
That is about 1/4 of the Hiroshima bomb. It released about 9 times the energy of a magnitude 5.0.
Tectonic setting
67 km
from the nearest mapped plate boundary, between the Aegean Sea and Anatolian plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
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 75 km
USGS has not published any M2.5+ earthquake within 75 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 6 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 6.14 km SE of Megálo Chorió, GreeceAugust 11, 1904 · 91 km NW of this epicenter
- 6.129 km ENE of Mesariá, GreeceApril 4, 1911 · 176 km W of this epicenter
- 6.021 km NNE of Karaburun, TurkeyJanuary 19, 1909 · 245 km NW of this epicenter
- 5.612 km S of Ierápetra, GreeceAugust 21, 1910 · 276 km SW of this epicenter
- 5.59 km NNW of Amorgós, GreeceJune 23, 1908 · 163 km W of this epicenter
- 5.511 km ESE of Kímolos, GreeceJune 23, 1908 · 266 km W of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 39 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 29,791 recorded deaths. The most severe:
- 1883M7.3
Ayvalik, Izmir, Cesme
15 Oct 1883 · 212 km away · intensity X
15,000 deathsExtreme damage ($25M+)
- 1881M7.3
Khios; Turkey: Cesme
3 Apr 1881 · 205 km away · intensity XI
7,866 deathsExtreme damage ($25M+)tsunami
- 1810
Crete: Iraklion (Candia)
16 Feb 1810 · 281 km away · intensity X
3,000 deathsSevere damage ($5–24M)tsunami
- 1875M7.3
Capali, Dinar, Civril, Yaka
3 May 1875 · 265 km away · intensity X
1,300 deathsExtreme damage ($25M+)
- 1899M6.7
Sultanhisar,Atca,Nazilli,Kuyucak,Denizli
20 Sep 1899 · 162 km away · intensity IX
1,117 deathsSevere damage ($5–24M)
- 1856
Crete; Egypt
12 Oct 1856 · 209 km away · intensity XI
600 deathsSevere damage ($5–24M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.