Reviewed by USGSGreece92y ago
M6.2 earthquake 66 km SSW of Folégandros, Greece
Monday, February 25, 1935, 02:51:29 UTC · 36.046°N, 24.756°E
A magnitude 6.2 earthquake struck 66 km SSW of Folégandros, Greece on Monday, February 25, 1935, 02:51:29 UTC, at a depth of 70.0 km (intermediate). It is the strongest earthquake within 300 km since an M6.4 on April 23, 1933.
- Magnitude
- 6.2
- 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
28 kilotons of TNT
That is about 2 times the Hiroshima bomb. It released about 59 times the energy of a magnitude 5.0.
Tectonic setting
169 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 81 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.9Southern GreeceAugust 11, 1903 · 158 km W of this epicenter
- 7.05 km NNW of Kéfalos, GreeceJune 26, 1926 · 212 km NE of this epicenter
- 6.733 km SE of Karpathos, GreeceAugust 13, 1922 · 262 km E of this epicenter
- 6.414 km E of Kardámaina, GreeceApril 23, 1933 · 241 km E of this epicenter
- 6.452 km SSE of Fry, GreeceAugust 11, 1922 · 247 km SE of this epicenter
- 6.329 km SSW of Asopós, GreeceJuly 1, 1927 · 189 km W of this epicenter
- 6.32 km NW of Sofikón, GreeceApril 22, 1928 · 249 km NW of this epicenter
- 6.35 km NNW of Géfyra, GreeceAugust 30, 1926 · 174 km NW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 49 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 29,365 recorded deaths. The most severe:
- 1883M7.3
Ayvalik, Izmir, Cesme
15 Oct 1883 · 281 km away · intensity X
15,000 deathsExtreme damage ($25M+)
- 1881M7.3
Khios; Turkey: Cesme
3 Apr 1881 · 279 km away · intensity XI
7,866 deathsExtreme damage ($25M+)tsunami
- 1810
Crete: Iraklion (Candia)
16 Feb 1810 · 65 km away · intensity X
3,000 deathsSevere damage ($5–24M)tsunami
- 1750
Morea,Cerigo
7 Jun 1750 · 159 km away · intensity X
2,000 deaths
- 1856
Crete; Egypt
12 Oct 1856 · 128 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.