QuakeScout
Magnitude3.5

Reviewed by USGS44y ago

M3.5 earthquake in Aegean Sea

Friday, June 25, 1982, 16:52:37 UTC · 38.891°N, 25.921°E

A magnitude 3.5 earthquake struck in Aegean Sea on Friday, June 25, 1982, 16:52:37 UTC, at a depth of 33.0 km (shallow).

Magnitude
3.5
Minor · mb
Depth
33 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

3 tons of TNT

That is about 1/5,615 of the Hiroshima bomb. A magnitude 5.0 releases about 178 times more energy.

Tectonic setting

73 km

from the nearest mapped plate boundary, between the Aegean Sea and Anatolian plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.

Depth: shallow

33 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 1 M2.5+ earthquake within 50 km in the following 30 days; the largest was M3.1 on July 12, 1982. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.

M31h6h1d3d7d14d30dMainshock M3.5
Time after the mainshock on a logarithmic scale (first hours stretched), magnitude on the vertical axis. M2.5+ events from USGS.
  1. 3.139 km W of Eresós, Greece44y ago · 49 km NW of this epicenter

Regional history

Past M5+ earthquakes within 300 km

USGS lists 296 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

  1. 7.719 km SSE of Amorgós, GreeceJuly 9, 1956 · 248 km S of this epicenter
  2. 7.37 km N of Gönen, TurkeyMarch 18, 1953 · 206 km NE of this epicenter
  3. 7.2Aegean SeaNovember 8, 1905 · 174 km NW of this epicenter
  4. 7.225 km SE of Malkara, TurkeyAugust 9, 1912 · 229 km NE of this epicenter
  5. 7.261 km W of Eresós, GreeceDecember 19, 1981 · 72 km NW of this epicenter
  6. 7.29 km NNW of Karaburun, TurkeyJuly 23, 1949 · 52 km E of this epicenter
  7. 7.03 km ESE of Soma, TurkeyNovember 18, 1919 · 153 km E of this epicenter
  8. 7.05 km NNW of Kéfalos, GreeceJune 26, 1926 · 250 km S of this epicenter

History · NOAA

Deadliest earthquakes in this area

NOAA’s significant-earthquake database lists 98 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 29,977 recorded deaths. The most severe:

  1. 1883M7.3

    Ayvalik, Izmir, Cesme

    15 Oct 1883 · 70 km away · intensity X

    15,000 deathsExtreme damage ($25M+)

  2. 1881M7.3

    Khios; Turkey: Cesme

    3 Apr 1881 · 77 km away · intensity XI

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

  3. 1912M7.2

    Marmara Sea

    9 Aug 1912 · 229 km away

    2,800 deathsExtreme damage ($25M+)tsunami

  4. 1899M6.7

    Sultanhisar,Atca,Nazilli,Kuyucak,Denizli

    20 Sep 1899 · 276 km away · intensity IX

    1,117 deathsSevere damage ($5–24M)

  5. 1953M7.3

    Yenice, Onon

    18 Mar 1953 · 206 km away

    1,070 deaths$4 million damage

  6. 1867M7.0

    Mitilini; Turkey: Izmir

    7 Mar 1867 · 54 km away

    563 deathsSevere damage ($5–24M)tsunami

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

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