M6.1 earthquake 4 km SE of Megálo Chorió, Greece

Thursday, August 11, 1904, 06:06:57 UTC · 37.426°N, 27.011°E

A magnitude 6.1 earthquake struck 4 km SE of Megálo Chorió, Greece on Thursday, August 11, 1904, 06:06:57 UTC, at a depth of 15.0 km (shallow). No earthquake of this size or larger appears within 300 km in the USGS catalog since 1900.

Magnitude: 6.1; Strong · 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

21 kilotons of TNT

That is about the energy of the Hiroshima bomb. It released about 45 times the energy of a magnitude 5.0.

Tectonic setting

110 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 no earlier M5.0+ earthquakes within 300 km.

History · NOAA

Deadliest earthquakes in this area

NOAA’s significant-earthquake database lists 40 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 29,808 recorded deaths. The most severe:

1883M7.3
Ayvalik, Izmir, Cesme
15 Oct 1883 · 120 km away · intensity X
15,000 deathsExtreme damage ($25M+)
1881M7.3
Khios; Turkey: Cesme
3 Apr 1881 · 113 km away · intensity XI
7,866 deathsExtreme damage ($25M+)tsunami
1810
Crete: Iraklion (Candia)
16 Feb 1810 · 280 km away · intensity X
3,000 deathsSevere damage ($5–24M)tsunami
1875M7.3
Capali, Dinar, Civril, Yaka
3 May 1875 · 290 km away · intensity X
1,300 deathsExtreme damage ($25M+)
1899M6.7
Sultanhisar,Atca,Nazilli,Kuyucak,Denizli
20 Sep 1899 · 170 km away · intensity IX
1,117 deathsSevere damage ($5–24M)
1856
Crete; Egypt
12 Oct 1856 · 232 km away · intensity XI
600 deathsSevere damage ($5–24M)tsunami

NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.

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