Reviewed by USGSNorth Macedonia96y ago
M6.7 earthquake 3 km SW of Kuklis, North Macedonia
Sunday, March 8, 1931, 01:50:21 UTC · 41.385°N, 22.641°E
A magnitude 6.7 earthquake struck 3 km SW of Kuklis, North Macedonia on Sunday, March 8, 1931, 01:50:21 UTC, at a depth of 10.0 km (shallow). It is the strongest earthquake within 300 km since an M7.1 on April 18, 1928.
- Magnitude
- 6.7
- Strong · mw
- Depth
- 10 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 earthquakeColoured lines: estimated shaking intensity (USGS ShakeMap)
In context
How big was it, and why here?
Energy released
142 kilotons of TNT
That is about 9 times the Hiroshima bomb. It released about 299 times the energy of a magnitude 5.0.
Tectonic setting
198 km
from the nearest mapped plate boundary, between the Aegean Sea and Eurasian plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: shallow
10 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 76 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.2Aegean SeaNovember 8, 1905 · 221 km SE of this epicenter
- 7.19 km S of Stara Zagora, BulgariaApril 14, 1928 · 271 km NE of this epicenter
- 7.13 km W of Brezovo, BulgariaApril 18, 1928 · 226 km NE of this epicenter
- 7.07 km SE of Stara Kresna, BulgariaApril 4, 1904 · 65 km NE of this epicenter
- 6.86 km W of Stara Kresna, BulgariaApril 4, 1904 · 60 km NE of this epicenter
- 6.617 km NNW of Bilisht, AlbaniaFebruary 18, 1911 · 162 km SW of this epicenter
- 6.59 km E of Stari Bar, MontenegroJune 1, 1905 · 292 km W of this epicenter
- 6.56 km N of Tríkeri, GreeceJanuary 20, 1905 · 251 km S of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 52 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 3,166 recorded deaths. The most severe:
- 1851M6.6
Vlore (Valona),Berat; Turkey
12 Oct 1851 · 266 km away · intensity XI
2,000 deathsExtreme damage ($25M+)tsunami
- 1851
Berat
17 Oct 1851 · 266 km away · intensity X
400 deathsSevere damage ($5–24M)
- 1920M6.2
Tepelene, Dragoti, Peshtani, Maricaj
26 Nov 1920 · 258 km away · intensity XI
200 deathsSevere damage ($5–24M)
- 1928M6.8
Chirpan
14 Apr 1928 · 238 km away · intensity X
127 deathsExtreme damage ($25M+)
- 1905M6.6
Shkoder
1 Jun 1905 · 265 km away · intensity X
120 deaths$24 million damage
- 1931M5.8
Korce
28 Jan 1931 · 177 km away · intensity IX
90 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.