QuakeScout
Magnitude2.5

Reviewed by USGSGreece22y ago

M2.5 earthquake 4 km ENE of Tríkeri, Greece

Monday, October 11, 2004, 22:07:26 UTC · 39.120°N, 23.120°E

A magnitude 2.5 earthquake struck 4 km ENE of Tríkeri, Greece on Monday, October 11, 2004, 22:07:26 UTC, at a depth of 4.0 km (shallow).

Magnitude
2.5
Minor · md
Depth
4 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

85 kg of TNT

That is about 1/177,558 of the Hiroshima bomb. A magnitude 5.0 releases about 5,623 times more energy.

Tectonic setting

16 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

4 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 536 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

  1. 7.34 km WNW of Koróni, GreeceOctober 6, 1947 · 278 km SW of this epicenter
  2. 7.2Aegean SeaNovember 8, 1905 · 168 km NE of this epicenter
  3. 7.261 km W of Eresós, GreeceDecember 19, 1981 · 182 km E of this epicenter
  4. 7.29 km NNW of Karaburun, TurkeyJuly 23, 1949 · 294 km E of this epicenter
  5. 7.07 km SE of Stara Kresna, BulgariaApril 4, 1904 · 294 km N of this epicenter
  6. 7.026 km SW of Lixoúri, GreeceJanuary 17, 1983 · 279 km SW of this epicenter
  7. 7.055 km S of Mýrina, GreeceFebruary 19, 1968 · 162 km E of this epicenter
  8. 6.97 km NNE of Ágios Nikólaos, GreeceSeptember 26, 1932 · 143 km N of this epicenter

History · NOAA

Deadliest earthquakes in this area

NOAA’s significant-earthquake database lists 183 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 27,440 recorded deaths. The most severe:

  1. 1883M7.3

    Ayvalik, Izmir, Cesme

    15 Oct 1883 · 282 km away · intensity X

    15,000 deathsExtreme damage ($25M+)

  2. 1881M7.3

    Khios; Turkey: Cesme

    3 Apr 1881 · 288 km away · intensity XI

    7,866 deathsExtreme damage ($25M+)tsunami

  3. 1867M7.0

    Mitilini; Turkey: Izmir

    7 Mar 1867 · 283 km away

    563 deathsSevere damage ($5–24M)tsunami

  4. 1953M7.2

    Lixouri-Argostoli (Kephallenia)

    12 Aug 1953 · 221 km away · intensity X

    476 deaths$100 million damagetsunami

  5. 1820M6.9

    Zakinthos (Zante)

    29 Dec 1820 · 223 km away · intensity X

    388 deathsSevere damage ($5–24M)tsunami

  6. 1886M6.8

    Triphylie (Peleponese), Philiatra

    27 Aug 1886 · 257 km away · intensity X

    326 deathsSevere damage ($5–24M)tsunami

NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.

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