Reviewed by USGSGreece44y ago
M4.2 earthquake 60 km W of Eresós, Greece
Thursday, July 22, 1982, 19:57:23 UTC · 39.071°N, 25.248°E
A magnitude 4.2 earthquake struck 60 km W of Eresós, Greece on Thursday, July 22, 1982, 19:57:23 UTC, at a depth of 23.2 km (shallow).
- Magnitude
- 4.2
- Light · mb
- Depth
- 23 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
30 tons of TNT
That is about 1/500 of the Hiroshima bomb. A magnitude 5.0 releases about 16 times more energy.
Tectonic setting
88 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
23 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 8 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M4.5 on July 23, 1982. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
- 3.753 km W of Eresós, Greece44y ago · 11 km NE of this epicenter
- 3.625 km WNW of Eresós, Greece44y ago · 42 km NE of this epicenter
- 3.527 km ESE of Skýros, Greece44y ago · 49 km SW of this epicenter
- 4.138 km WSW of Eresós, Greece44y ago · 22 km E of this epicenter
- 3.636 km ESE of Skýros, Greece44y ago · 37 km SW of this epicenter
- 3.143 km ESE of Skýros, Greece44y ago · 38 km SW of this epicenter
- 3.058 km ENE of Skýros, Greece44y ago · 6 km SW of this epicenter
- 4.561 km ENE of Skýros, Greece44y ago · 2 km S of this epicenter
Regional history
Past M5+ earthquakes within 300 km
USGS lists 284 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.719 km SSE of Amorgós, GreeceJuly 9, 1956 · 275 km S of this epicenter
- 7.37 km N of Gönen, TurkeyMarch 18, 1953 · 239 km NE of this epicenter
- 7.2Aegean SeaNovember 8, 1905 · 125 km NW of this epicenter
- 7.225 km SE of Malkara, TurkeyAugust 9, 1912 · 244 km NE of this epicenter
- 7.261 km W of Eresós, GreeceDecember 19, 1981 · 19 km N of this epicenter
- 7.29 km NNW of Karaburun, TurkeyJuly 23, 1949 · 114 km E of this epicenter
- 7.03 km ESE of Soma, TurkeyNovember 18, 1919 · 208 km E of this epicenter
- 7.05 km NNW of Kéfalos, GreeceJune 26, 1926 · 293 km SE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 104 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 28,890 recorded deaths. The most severe:
- 1883M7.3
Ayvalik, Izmir, Cesme
15 Oct 1883 · 119 km away · intensity X
15,000 deathsExtreme damage ($25M+)
- 1881M7.3
Khios; Turkey: Cesme
3 Apr 1881 · 126 km away · intensity XI
7,866 deathsExtreme damage ($25M+)tsunami
- 1912M7.2
Marmara Sea
9 Aug 1912 · 244 km away
2,800 deathsExtreme damage ($25M+)tsunami
- 1953M7.3
Yenice, Onon
18 Mar 1953 · 239 km away
1,070 deaths$4 million damage
- 1867M7.0
Mitilini; Turkey: Izmir
7 Mar 1867 · 100 km away
563 deathsSevere damage ($5–24M)tsunami
- 1894M6.7
Locride, Malesina-Martinon (Lokris)
20 Apr 1894 · 185 km away · intensity X
255 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.