Reviewed by USGSGreece98y ago
M6.1 earthquake 53 km S of Folégandros, Greece
Friday, February 14, 1930, 18:38:12 UTC · 36.152°N, 24.808°E
A magnitude 6.1 earthquake struck 53 km S of Folégandros, Greece on Friday, February 14, 1930, 18:38:12 UTC, at a depth of 70.0 km (intermediate). It is the strongest earthquake within 300 km since an M6.3 on April 22, 1928.
- Magnitude
- 6.1
- Strong · mw
- Depth
- 70 km
- Intermediate
- 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
19 kilotons of TNT
That is about the energy of the Hiroshima bomb. It released about 39 times the energy of a magnitude 5.0.
Tectonic setting
180 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: intermediate
70 km
Intermediate-depth earthquakes usually break inside a plate that is sinking into the mantle. Shaking spreads over a wide area but is gentler at the epicenter than a shallow quake of the same size.
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 54 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.9Southern GreeceAugust 11, 1903 · 163 km W of this epicenter
- 7.05 km NNW of Kéfalos, GreeceJune 26, 1926 · 203 km E of this epicenter
- 6.733 km SE of Karpathos, GreeceAugust 13, 1922 · 261 km E of this epicenter
- 6.452 km SSE of Fry, GreeceAugust 11, 1922 · 249 km SE of this epicenter
- 6.329 km SSW of Asopós, GreeceJuly 1, 1927 · 191 km W of this epicenter
- 6.32 km NW of Sofikón, GreeceApril 22, 1928 · 243 km NW of this epicenter
- 6.35 km NNW of Géfyra, GreeceAugust 30, 1926 · 173 km NW of this epicenter
- 6.21 km SW of Avlónas, GreeceOctober 17, 1914 · 253 km NW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 48 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 29,187 recorded deaths. The most severe:
- 1883M7.3
Ayvalik, Izmir, Cesme
15 Oct 1883 · 269 km away · intensity X
15,000 deathsExtreme damage ($25M+)
- 1881M7.3
Khios; Turkey: Cesme
3 Apr 1881 · 266 km away · intensity XI
7,866 deathsExtreme damage ($25M+)tsunami
- 1810
Crete: Iraklion (Candia)
16 Feb 1810 · 75 km away · intensity X
3,000 deathsSevere damage ($5–24M)tsunami
- 1750
Morea,Cerigo
7 Jun 1750 · 162 km away · intensity X
2,000 deaths
- 1856
Crete; Egypt
12 Oct 1856 · 130 km away · intensity XI
600 deathsSevere damage ($5–24M)tsunami
- 1886M6.8
Triphylie (Peleponese), Philiatra
27 Aug 1886 · 297 km away · intensity X
326 deathsSevere damage ($5–24M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.