Reviewed by USGSGreece43y ago
M4.3 earthquake 41 km ESE of Sykiá, Greece
Wednesday, November 16, 1983, 05:56:28 UTC · 39.874°N, 24.382°E
A magnitude 4.3 earthquake struck 41 km ESE of Sykiá, Greece on Wednesday, November 16, 1983, 05:56:28 UTC, at a depth of 10.9 km (shallow).
- Magnitude
- 4.3
- Light · mb
- Depth
- 11 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
43 tons of TNT
That is about 1/354 of the Hiroshima bomb. A magnitude 5.0 releases about 11 times more energy.
Tectonic setting
15 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
11 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 M3.7 on November 25, 1983. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 293 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.37 km N of Gönen, TurkeyMarch 18, 1953 · 280 km E of this epicenter
- 7.2Aegean SeaNovember 8, 1905 · 32 km NE of this epicenter
- 7.225 km SE of Malkara, TurkeyAugust 9, 1912 · 251 km NE of this epicenter
- 7.261 km W of Eresós, GreeceDecember 19, 1981 · 101 km SE of this epicenter
- 7.29 km NNW of Karaburun, TurkeyJuly 23, 1949 · 222 km SE of this epicenter
- 7.19 km S of Stara Zagora, BulgariaApril 14, 1928 · 295 km N of this epicenter
- 7.13 km W of Brezovo, BulgariaApril 18, 1928 · 281 km N of this epicenter
- 7.07 km SE of Stara Kresna, BulgariaApril 4, 1904 · 230 km NW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 103 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 28,730 recorded deaths. The most severe:
- 1883M7.3
Ayvalik, Izmir, Cesme
15 Oct 1883 · 235 km away · intensity X
15,000 deathsExtreme damage ($25M+)
- 1881M7.3
Khios; Turkey: Cesme
3 Apr 1881 · 242 km away · intensity XI
7,866 deathsExtreme damage ($25M+)tsunami
- 1912M7.2
Marmara Sea
9 Aug 1912 · 251 km away
2,800 deathsExtreme damage ($25M+)tsunami
- 1953M7.3
Yenice, Onon
18 Mar 1953 · 280 km away
1,070 deaths$4 million damage
- 1867M7.0
Mitilini; Turkey: Izmir
7 Mar 1867 · 189 km away
563 deathsSevere damage ($5–24M)tsunami
- 1894M6.7
Locride, Malesina-Martinon (Lokris)
20 Apr 1894 · 174 km away · intensity X
255 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.