Reviewed by USGSGreece22y ago
M2.9 earthquake 11 km WNW of Ástros, Greece
Friday, October 22, 2004, 02:02:15 UTC · 37.440°N, 22.600°E
A magnitude 2.9 earthquake struck 11 km WNW of Ástros, Greece on Friday, October 22, 2004, 02:02:15 UTC, at a depth of 37.0 km (shallow).
- Magnitude
- 2.9
- Minor · md
- Depth
- 37 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 earthquake
In context
How big was it, and why here?
Energy released
338 kg of TNT
That is about 1/44,601 of the Hiroshima bomb. A magnitude 5.0 releases about 1,413 times more energy.
Tectonic setting
92 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
37 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 has not published any M2.5+ earthquake within 50 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 501 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.9Southern GreeceAugust 11, 1903 · 164 km S of this epicenter
- 7.34 km WNW of Koróni, GreeceOctober 6, 1947 · 93 km SW of this epicenter
- 7.026 km SW of Lixoúri, GreeceJanuary 17, 1983 · 219 km W of this epicenter
- 7.055 km S of Mýrina, GreeceFebruary 19, 1968 · 299 km NE of this epicenter
- 6.815 km ENE of Póros, GreeceAugust 12, 1953 · 167 km NW of this epicenter
- 6.86 km SW of Galaxídhion, GreeceMarch 31, 1965 · 103 km N of this epicenter
- 6.7Ionian SeaNovember 15, 1959 · 184 km W of this epicenter
- 6.75 km SW of Domvraína, GreeceFebruary 24, 1981 · 92 km N of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 142 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 5,401 recorded deaths. The most severe:
- 1750
Morea,Cerigo
7 Jun 1750 · 142 km away · intensity X
2,000 deaths
- 1953M7.2
Lixouri-Argostoli (Kephallenia)
12 Aug 1953 · 185 km away · intensity X
476 deaths$100 million damagetsunami
- 1820M6.9
Zakinthos (Zante)
29 Dec 1820 · 124 km away · intensity X
388 deathsSevere damage ($5–24M)tsunami
- 1886M6.8
Triphylie (Peleponese), Philiatra
27 Aug 1886 · 88 km away · intensity X
326 deathsSevere damage ($5–24M)tsunami
- 1767M6.7
Kefalonia
11 Jul 1767 · 209 km away · intensity X
303 deathsSevere damage ($5–24M)
- 1894M6.7
Locride, Malesina-Martinon (Lokris)
20 Apr 1894 · 139 km away · intensity X
255 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.