Reviewed by USGS22y ago
M3.3 earthquake in Greece
Tuesday, October 5, 2004, 06:07:05 UTC · 39.050°N, 21.720°E
A magnitude 3.3 earthquake struck in Greece on Tuesday, October 5, 2004, 06:07:05 UTC, at a depth of 9.0 km (shallow).
- Magnitude
- 3.3
- Minor · md
- Depth
- 9 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
1 tons of TNT
That is about 1/11,203 of the Hiroshima bomb. A magnitude 5.0 releases about 355 times more energy.
Tectonic setting
71 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
9 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 6 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M3.2 on October 24, 2004. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
- 2.911 km ENE of Sardínia, Greece22y ago · 36 km W of this epicenter
- 2.78 km ENE of Kríkellos, Greece22y ago · 40 km W of this epicenter
- 3.210 km ESE of Sardínia, Greece22y ago · 42 km SW of this epicenter
- 3.26 km E of Paravóla, Greece22y ago · 49 km S of this epicenter
- 3.28 km S of Áno Kalentíni, Greece22y ago · 48 km W of this epicenter
- 3.18 km WNW of Makrakómi, Greece22y ago · 28 km E of this epicenter
Regional history
Past M5+ earthquakes within 300 km
USGS lists 571 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 · 250 km S of this epicenter
- 7.2Aegean SeaNovember 8, 1905 · 275 km NE of this epicenter
- 7.026 km SW of Lixoúri, GreeceJanuary 17, 1983 · 173 km SW of this epicenter
- 7.055 km S of Mýrina, GreeceFebruary 19, 1968 · 283 km E of this epicenter
- 6.97 km NNE of Ágios Nikólaos, GreeceSeptember 26, 1932 · 223 km NE of this epicenter
- 6.815 km ENE of Póros, GreeceAugust 12, 1953 · 118 km SW of this epicenter
- 6.86 km SW of Galaxídhion, GreeceMarch 31, 1965 · 95 km SE of this epicenter
- 6.839 km NW of Mýrina, GreeceAugust 6, 1983 · 288 km NE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 185 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 6,595 recorded deaths. The most severe:
- 1851M6.6
Vlore (Valona),Berat; Turkey
12 Oct 1851 · 236 km away · intensity XI
2,000 deathsExtreme damage ($25M+)tsunami
- 1953M7.2
Lixouri-Argostoli (Kephallenia)
12 Aug 1953 · 115 km away · intensity X
476 deaths$100 million damagetsunami
- 1851
Berat
17 Oct 1851 · 236 km away · intensity X
400 deathsSevere damage ($5–24M)
- 1820M6.9
Zakinthos (Zante)
29 Dec 1820 · 150 km away · intensity X
388 deathsSevere damage ($5–24M)tsunami
- 1886M6.8
Triphylie (Peleponese), Philiatra
27 Aug 1886 · 217 km away · intensity X
326 deathsSevere damage ($5–24M)tsunami
- 1767M6.7
Kefalonia
11 Jul 1767 · 139 km away · intensity X
303 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.