Reviewed by USGSGreece101y ago
M7.0 earthquake 5 km NNW of Kéfalos, Greece
Saturday, June 26, 1926, 19:46:34 UTC · 36.794°N, 26.935°E
A magnitude 7.0 earthquake struck 5 km NNW of Kéfalos, Greece on Saturday, June 26, 1926, 19:46:34 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M7.0 on November 18, 1919.
- Magnitude
- 7.0
- 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 earthquakeDashed circle: 100 km aftershock search areaColoured lines: estimated shaking intensity (USGS ShakeMap)
In context
How big was it, and why here?
Energy released
430 kilotons of TNT
That is about 29 times the Hiroshima bomb. It released about 902 times the energy of a magnitude 5.0.
Tectonic setting
128 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 lists 1 M2.5+ earthquake within 100 km in the following 30 days; the largest was M5.2 on June 27, 1926. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 43 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 · 299 km E of this epicenter
- 7.03 km ESE of Soma, TurkeyNovember 18, 1919 · 272 km N of this epicenter
- 6.815 km SSW of Kaş, TurkeyMarch 18, 1926 · 251 km E of this epicenter
- 6.733 km SE of Karpathos, GreeceAugust 13, 1922 · 171 km S of this epicenter
- 6.452 km SSE of Fry, GreeceAugust 11, 1922 · 202 km S of this epicenter
- 6.14 km SE of Megálo Chorió, GreeceAugust 11, 1904 · 71 km N of this epicenter
- 6.129 km ENE of Mesariá, GreeceApril 4, 1911 · 111 km W of this epicenter
- 6.035 km S of Amorgós, GreeceOctober 25, 1919 · 100 km W of this epicenter
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 28,516 recorded deaths. The most severe:
- 1883M7.3
Ayvalik, Izmir, Cesme
15 Oct 1883 · 180 km away · intensity X
15,000 deathsExtreme damage ($25M+)
- 1881M7.3
Khios; Turkey: Cesme
3 Apr 1881 · 173 km away · intensity XI
7,866 deathsExtreme damage ($25M+)tsunami
- 1810
Crete: Iraklion (Candia)
16 Feb 1810 · 226 km away · intensity X
3,000 deathsSevere damage ($5–24M)tsunami
- 1899M6.7
Sultanhisar,Atca,Nazilli,Kuyucak,Denizli
20 Sep 1899 · 210 km away · intensity IX
1,117 deathsSevere damage ($5–24M)
- 1856
Crete; Egypt
12 Oct 1856 · 167 km away · intensity XI
600 deathsSevere damage ($5–24M)tsunami
- 1867M7.0
Mitilini; Turkey: Izmir
7 Mar 1867 · 272 km away
563 deathsSevere damage ($5–24M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.