Reviewed by USGSGreece22y ago
M3.1 earthquake 4 km NNE of Katoúna, Greece
Wednesday, September 1, 2004, 03:48:47 UTC · 38.820°N, 21.130°E
A magnitude 3.1 earthquake struck 4 km NNE of Katoúna, Greece on Wednesday, September 1, 2004, 03:48:47 UTC, at a depth of 3.0 km (shallow).
- Magnitude
- 3.1
- Minor · md
- Depth
- 3 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
674 kg of TNT
That is about 1/22,353 of the Hiroshima bomb. A magnitude 5.0 releases about 708 times more energy.
Tectonic setting
42 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
3 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 M4.4 on September 15, 2004. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
- 3.31 km SSW of Amfilochía, Greece22y ago · 4 km NE of this epicenter
- 3.41 km ESE of Stános, Greece22y ago · 6 km SE of this epicenter
- 4.421 km SSW of Lefkáda, Greece22y ago · 50 km W of this epicenter
- 3.33 km SE of Kainoúryion, Greece22y ago · 42 km SE of this epicenter
- 3.63 km W of Kalamiá, Greece22y ago · 43 km NW of this epicenter
Regional history
Past M5+ earthquakes within 300 km
USGS lists 546 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 · 234 km S of this epicenter
- 7.026 km SW of Lixoúri, GreeceJanuary 17, 1983 · 118 km SW of this epicenter
- 6.97 km NNE of Ágios Nikólaos, GreeceSeptember 26, 1932 · 278 km NE of this epicenter
- 6.815 km ENE of Póros, GreeceAugust 12, 1953 · 73 km S of this epicenter
- 6.86 km SW of Galaxídhion, GreeceMarch 31, 1965 · 117 km SE of this epicenter
- 6.7Ionian SeaNovember 15, 1959 · 119 km SW of this epicenter
- 6.76 km NW of Lukovo, North MacedoniaNovember 30, 1967 · 290 km N of this epicenter
- 6.75 km SW of Domvraína, GreeceFebruary 24, 1981 · 170 km E of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 178 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 6,383 recorded deaths. The most severe:
- 1851M6.6
Vlore (Valona),Berat; Turkey
12 Oct 1851 · 223 km away · intensity XI
2,000 deathsExtreme damage ($25M+)tsunami
- 1953M7.2
Lixouri-Argostoli (Kephallenia)
12 Aug 1953 · 65 km away · intensity X
476 deaths$100 million damagetsunami
- 1851
Berat
17 Oct 1851 · 223 km away · intensity X
400 deathsSevere damage ($5–24M)
- 1820M6.9
Zakinthos (Zante)
29 Dec 1820 · 119 km away · intensity X
388 deathsSevere damage ($5–24M)tsunami
- 1886M6.8
Triphylie (Peleponese), Philiatra
27 Aug 1886 · 198 km away · intensity X
326 deathsSevere damage ($5–24M)tsunami
- 1767M6.7
Kefalonia
11 Jul 1767 · 84 km away · intensity X
303 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.