Reviewed by USGSGreece101y ago
M6.3 earthquake 5 km NNW of Géfyra, Greece
Monday, August 30, 1926, 11:38:05 UTC · 36.734°N, 23.016°E
A magnitude 6.3 earthquake struck 5 km NNW of Géfyra, Greece on Monday, August 30, 1926, 11:38:05 UTC, at a depth of 50.0 km (shallow). It is the strongest earthquake within 300 km since an M6.5 on January 27, 1915.
- Magnitude
- 6.3
- Strong · mw
- Depth
- 50 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- VI
- 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
38 kilotons of TNT
That is about 3 times the Hiroshima bomb. It released about 80 times the energy of a magnitude 5.0.
Tectonic setting
124 km
from the nearest mapped plate boundary, between the Aegean Sea and African plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: shallow
50 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 55 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.9Southern GreeceAugust 11, 1903 · 82 km S of this epicenter
- 6.56 km N of Tríkeri, GreeceJanuary 20, 1905 · 269 km N of this epicenter
- 6.521 km SW of Lixoúri, GreeceJanuary 27, 1915 · 284 km NW of this epicenter
- 6.411 km W of Kyllíni, GreeceJanuary 24, 1912 · 221 km NW of this epicenter
- 6.326 km NNW of Itháki, GreeceNovember 27, 1914 · 297 km NW of this epicenter
- 6.21 km SW of Avlónas, GreeceOctober 17, 1914 · 178 km N of this epicenter
- 6.233 km WSW of Filiatrá, GreeceFebruary 24, 1919 · 161 km W of this epicenter
- 6.129 km ENE of Mesariá, GreeceApril 4, 1911 · 244 km E of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 64 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 7,228 recorded deaths. The most severe:
- 1810
Crete: Iraklion (Candia)
16 Feb 1810 · 225 km away · intensity X
3,000 deathsSevere damage ($5–24M)tsunami
- 1750
Morea,Cerigo
7 Jun 1750 · 59 km away · intensity X
2,000 deaths
- 1820M6.9
Zakinthos (Zante)
29 Dec 1820 · 193 km away · intensity X
388 deathsSevere damage ($5–24M)tsunami
- 1886M6.8
Triphylie (Peleponese), Philiatra
27 Aug 1886 · 124 km away · intensity X
326 deathsSevere damage ($5–24M)tsunami
- 1767M6.7
Kefalonia
11 Jul 1767 · 282 km away · intensity X
303 deathsSevere damage ($5–24M)
- 1894M6.7
Locride, Malesina-Martinon (Lokris)
20 Apr 1894 · 208 km away · intensity X
255 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.