Reviewed by USGSGreece73y ago
M6.7 earthquake 7 km NE of Anávra, Greece
Friday, April 30, 1954, 13:02:39 UTC · 39.228°N, 22.162°E
A magnitude 6.7 earthquake struck 7 km NE of Anávra, Greece on Friday, April 30, 1954, 13:02:39 UTC, at a depth of 10.0 km (shallow). It is the strongest earthquake within 300 km since an M6.8 on August 12, 1953.
- 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 earthquakeDashed circle: 100 km aftershock search areaColoured lines: estimated shaking intensity (USGS ShakeMap)
In context
How big was it, and why here?
Energy released
147 kilotons of TNT
That is about 10 times the Hiroshima bomb. It released about 309 times the energy of a magnitude 5.0.
Tectonic setting
94 km
from the nearest mapped plate boundary, between the Aegean Sea and Eurasian plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
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 lists 3 M2.5+ earthquakes within 100 km in the following 30 days; the largest was M5.8 on May 4, 1954. 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 248 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.34 km WNW of Koróni, GreeceOctober 6, 1947 · 270 km S of this epicenter
- 7.2Aegean SeaNovember 8, 1905 · 232 km NE of this epicenter
- 7.07 km SE of Stara Kresna, BulgariaApril 4, 1904 · 296 km N of this epicenter
- 6.97 km NNE of Ágios Nikólaos, GreeceSeptember 26, 1932 · 181 km NE of this epicenter
- 6.86 km W of Stara Kresna, BulgariaApril 4, 1904 · 297 km N of this epicenter
- 6.815 km ENE of Póros, GreeceAugust 12, 1953 · 157 km SW of this epicenter
- 6.73 km SW of Kuklis, North MacedoniaMarch 8, 1931 · 243 km N of this epicenter
- 6.635 km NW of Itháki, GreeceApril 22, 1948 · 167 km SW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 126 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 6,151 recorded deaths. The most severe:
- 1851M6.6
Vlore (Valona),Berat; Turkey
12 Oct 1851 · 253 km away · intensity XI
2,000 deathsExtreme damage ($25M+)tsunami
- 1953M7.2
Lixouri-Argostoli (Kephallenia)
12 Aug 1953 · 157 km away · intensity X
476 deaths$100 million damagetsunami
- 1851
Berat
17 Oct 1851 · 253 km away · intensity X
400 deathsSevere damage ($5–24M)
- 1820M6.9
Zakinthos (Zante)
29 Dec 1820 · 183 km away · intensity X
388 deathsSevere damage ($5–24M)tsunami
- 1886M6.8
Triphylie (Peleponese), Philiatra
27 Aug 1886 · 240 km away · intensity X
326 deathsSevere damage ($5–24M)tsunami
- 1767M6.7
Kefalonia
11 Jul 1767 · 182 km away · intensity X
303 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.