Reviewed by USGSGreece113y ago
M5.7 earthquake 3 km SSW of Markópoulo Oropoú, Greece
Saturday, October 17, 1914, 10:42:07 UTC · 38.257°N, 23.816°E
A magnitude 5.7 earthquake struck 3 km SSW of Markópoulo Oropoú, Greece on Saturday, October 17, 1914, 10:42:07 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M6.2 on October 17, 1914.
- Magnitude
- 5.7
- 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
6 kilotons of TNT
That is about 1/2 of the Hiroshima bomb. It released about 13 times the energy of a magnitude 5.0.
Tectonic setting
84 km
from the nearest mapped plate boundary, between the Aegean Sea and Eurasian 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 16 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.9Southern GreeceAugust 11, 1903 · 261 km S of this epicenter
- 7.2Aegean SeaNovember 8, 1905 · 216 km N of this epicenter
- 6.56 km N of Tríkeri, GreeceJanuary 20, 1905 · 118 km NW of this epicenter
- 6.411 km W of Kyllíni, GreeceJanuary 24, 1912 · 248 km W of this epicenter
- 6.21 km SW of Avlónas, GreeceOctober 17, 1914 · 12 km W of this epicenter
- 6.14 km SE of Megálo Chorió, GreeceAugust 11, 1904 · 295 km E of this epicenter
- 6.129 km ENE of Mesariá, GreeceApril 4, 1911 · 257 km SE of this epicenter
- 6.021 km NNE of Karaburun, TurkeyJanuary 19, 1909 · 248 km E of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 93 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 27,839 recorded deaths. The most severe:
- 1883M7.3
Ayvalik, Izmir, Cesme
15 Oct 1883 · 208 km away · intensity X
15,000 deathsExtreme damage ($25M+)
- 1881M7.3
Khios; Turkey: Cesme
3 Apr 1881 · 213 km away · intensity XI
7,866 deathsExtreme damage ($25M+)tsunami
- 1750
Morea,Cerigo
7 Jun 1750 · 240 km away · intensity X
2,000 deaths
- 1867M7.0
Mitilini; Turkey: Izmir
7 Mar 1867 · 247 km away
563 deathsSevere damage ($5–24M)tsunami
- 1820M6.9
Zakinthos (Zante)
29 Dec 1820 · 232 km away · intensity X
388 deathsSevere damage ($5–24M)tsunami
- 1886M6.8
Triphylie (Peleponese), Philiatra
27 Aug 1886 · 226 km away · intensity X
326 deathsSevere damage ($5–24M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.