Reviewed by USGSGreece22y ago
M3.4 earthquake 12 km WNW of Trípoli, Greece
Wednesday, February 11, 2004, 03:02:29 UTC · 37.560°N, 22.250°E
A magnitude 3.4 earthquake struck 12 km WNW of Trípoli, Greece on Wednesday, February 11, 2004, 03:02:29 UTC, at a depth of 17.0 km (shallow).
- Magnitude
- 3.4
- Minor · ml
- Depth
- 17 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- —
- No ShakeMap
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquakeDashed circle: 50 km aftershock search area
In context
How big was it, and why here?
Energy released
2 tons of TNT
That is about 1/7,931 of the Hiroshima bomb. A magnitude 5.0 releases about 251 times more energy.
Tectonic setting
85 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
17 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 50 km
USGS lists 5 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M5.6 on March 1, 2004. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
- 3.310 km E of Arfará, Greece22y ago · 45 km S of this epicenter
- 2.911 km NE of Arfará, Greece22y ago · 38 km S of this epicenter
- 3.14 km NE of Lálas, Greece22y ago · 47 km NW of this epicenter
- 5.66 km ESE of Arfará, Greece22y ago · 49 km S of this epicenter
- 3.316 km W of Dimitsána, Greece22y ago · 35 km W of this epicenter
Regional history
Past M5+ earthquakes within 300 km
USGS lists 499 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.9Southern GreeceAugust 11, 1903 · 186 km S of this epicenter
- 7.34 km WNW of Koróni, GreeceOctober 6, 1947 · 89 km S of this epicenter
- 7.026 km SW of Lixoúri, GreeceJanuary 17, 1983 · 185 km W of this epicenter
- 6.815 km ENE of Póros, GreeceAugust 12, 1953 · 134 km NW of this epicenter
- 6.86 km SW of Galaxídhion, GreeceMarch 31, 1965 · 87 km N of this epicenter
- 6.7Ionian SeaNovember 15, 1959 · 151 km W of this epicenter
- 6.75 km SW of Domvraína, GreeceFebruary 24, 1981 · 95 km NE of this epicenter
- 6.77 km NE of Anávra, GreeceApril 30, 1954 · 186 km N of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 146 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 5,380 recorded deaths. The most severe:
- 1750
Morea,Cerigo
7 Jun 1750 · 165 km away · intensity X
2,000 deaths
- 1953M7.2
Lixouri-Argostoli (Kephallenia)
12 Aug 1953 · 151 km away · intensity X
476 deaths$100 million damagetsunami
- 1820M6.9
Zakinthos (Zante)
29 Dec 1820 · 91 km away · intensity X
388 deathsSevere damage ($5–24M)tsunami
- 1886M6.8
Triphylie (Peleponese), Philiatra
27 Aug 1886 · 71 km away · intensity X
326 deathsSevere damage ($5–24M)tsunami
- 1767M6.7
Kefalonia
11 Jul 1767 · 175 km away · intensity X
303 deathsSevere damage ($5–24M)
- 1894M6.7
Locride, Malesina-Martinon (Lokris)
20 Apr 1894 · 142 km away · intensity X
255 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.