Reviewed by USGSTurkey74y ago
M7.3 earthquake 7 km N of Gönen, Turkey
Wednesday, March 18, 1953, 19:06:17 UTC · 40.175°N, 27.648°E
A magnitude 7.3 earthquake struck 7 km N of Gönen, Turkey on Wednesday, March 18, 1953, 19:06:17 UTC, at a depth of 10.0 km (shallow). No earthquake of this size or larger appears within 300 km in the USGS catalog since 1900.
- Magnitude
- 7.3
- Major · mw
- Depth
- 10 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- VIII
- Severe (ShakeMap)
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquakeDashed circle: 200 km aftershock search areaColoured lines: estimated shaking intensity (USGS ShakeMap)
In context
How big was it, and why here?
Energy released
1.3 megatons of TNT
That is about 89 times the Hiroshima bomb. It released about 2,818 times the energy of a magnitude 5.0.
Tectonic setting
51 km
from the nearest mapped plate boundary, between the Anatolian and Eurasian plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
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 200 km
USGS lists 4 M2.5+ earthquakes within 200 km in the following 30 days; the largest was M5.5 on March 18, 1953. 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 75 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.2Aegean SeaNovember 8, 1905 · 257 km W of this epicenter
- 7.225 km SE of Malkara, TurkeyAugust 9, 1912 · 76 km NW of this epicenter
- 7.29 km NNW of Karaburun, TurkeyJuly 23, 1949 · 191 km SW of this epicenter
- 7.19 km S of Stara Zagora, BulgariaApril 14, 1928 · 294 km NW of this epicenter
- 7.03 km ESE of Soma, TurkeyNovember 18, 1919 · 111 km S of this epicenter
- 6.7TurkeyOctober 6, 1944 · 117 km SW of this epicenter
- 6.730 km SW of Kumbağ, TurkeySeptember 13, 1912 · 68 km NW of this epicenter
- 6.59 km NNW of Bergama, TurkeySeptember 22, 1939 · 116 km S of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 66 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 48,007 recorded deaths. The most severe:
- 1883M7.3
Ayvalik, Izmir, Cesme
15 Oct 1883 · 243 km away · intensity X
15,000 deathsExtreme damage ($25M+)
- 1881M7.3
Khios; Turkey: Cesme
3 Apr 1881 · 246 km away · intensity XI
7,866 deathsExtreme damage ($25M+)tsunami
- 1719
Turkey
25 May 1719 · 164 km away · intensity X
6,000 deathsExtreme damage ($25M+)
- 1766M6.5
Turkey
22 May 1766 · 134 km away · intensity X
4,000 deathsExtreme damage ($25M+)tsunami
- 1912M7.2
Marmara Sea
9 Aug 1912 · 76 km away
2,800 deathsExtreme damage ($25M+)tsunami
- 1855M6.7
Tayabas, Bursa
28 Feb 1855 · 123 km away · intensity X
2,200 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.