QuakeScout
Magnitude3.7

Reviewed by USGSGreece48y ago

M3.7 earthquake 2 km NE of Lagkadás, Greece

Thursday, September 28, 1978, 23:16:10 UTC · 40.766°N, 23.090°E

A magnitude 3.7 earthquake struck 2 km NE of Lagkadás, Greece on Thursday, September 28, 1978, 23:16:10 UTC, at a depth of 10.0 km (shallow).

Magnitude
3.7
Minor · mb
Depth
10 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

5 tons of TNT

That is about 1/2,814 of the Hiroshima bomb. A magnitude 5.0 releases about 89 times more energy.

Tectonic setting

121 km

from the nearest mapped plate boundary, between the Aegean Sea and Eurasian plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.

Depth: shallow

10 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 301 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

  1. 7.2Aegean SeaNovember 8, 1905 · 150 km SE of this epicenter
  2. 7.19 km S of Stara Zagora, BulgariaApril 14, 1928 · 276 km NE of this epicenter
  3. 7.13 km W of Brezovo, BulgariaApril 18, 1928 · 240 km NE of this epicenter
  4. 7.07 km SE of Stara Kresna, BulgariaApril 4, 1904 · 111 km N of this epicenter
  5. 7.055 km S of Mýrina, GreeceFebruary 19, 1968 · 222 km SE of this epicenter
  6. 6.97 km NNE of Ágios Nikólaos, GreeceSeptember 26, 1932 · 75 km SE of this epicenter
  7. 6.86 km W of Stara Kresna, BulgariaApril 4, 1904 · 115 km N of this epicenter
  8. 6.86 km SW of Galaxídhion, GreeceMarch 31, 1965 · 278 km S of this epicenter

History · NOAA

Deadliest earthquakes in this area

NOAA’s significant-earthquake database lists 99 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 5,242 recorded deaths. The most severe:

  1. 1851M6.6

    Vlore (Valona),Berat; Turkey

    12 Oct 1851 · 288 km away · intensity XI

    2,000 deathsExtreme damage ($25M+)tsunami

  2. 1963M6.0

    Macedonia: Skopje

    26 Jul 1963 · 210 km away · intensity X

    1,070 deaths$1.0 billion damage

  3. 1851

    Berat

    17 Oct 1851 · 288 km away · intensity X

    400 deathsSevere damage ($5–24M)

  4. 1894M6.7

    Locride, Malesina-Martinon (Lokris)

    20 Apr 1894 · 241 km away · intensity X

    255 deathsSevere damage ($5–24M)

  5. 1920M6.2

    Tepelene, Dragoti, Peshtani, Maricaj

    26 Nov 1920 · 269 km away · intensity XI

    200 deathsSevere damage ($5–24M)

  6. 1932M6.9

    Hierissos-Strantonion (Chalkidiki)

    26 Sep 1932 · 74 km away · intensity X

    161 deathsExtreme damage ($25M+)tsunami

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

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