Reviewed by USGSEl Salvador103y ago
M6.7 earthquake 108 km SSW of Puerto El Triunfo, El Salvador
Thursday, May 1, 1924, 19:54:23 UTC · 12.415°N, 89.015°W
A magnitude 6.7 earthquake struck 108 km SSW of Puerto El Triunfo, El Salvador on Thursday, May 1, 1924, 19:54:23 UTC, at a depth of 20.0 km (shallow). It is the strongest earthquake within 300 km since an M7.2 on March 28, 1921.
- Magnitude
- 6.7
- Strong · mw
- Depth
- 20 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- IV
- Light (ShakeMap)
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquakeColoured lines: estimated shaking intensity (USGS ShakeMap)
In context
How big was it, and why here?
Energy released
163 kilotons of TNT
That is about 11 times the Hiroshima bomb. It released about 343 times the energy of a magnitude 5.0.
Tectonic setting
38 km
from the nearest mapped plate boundary, between the Caribbean and Cocos plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
20 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 100 km
USGS has not published any M2.5+ earthquake within 100 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 16 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.712 km NW of Chalatenango, El SalvadorSeptember 7, 1915 · 190 km N of this epicenter
- 7.27 km SW of El Viejo, NicaraguaMarch 28, 1921 · 196 km E of this epicenter
- 7.2116 km SW of Corinto, NicaraguaJuly 1, 1907 · 152 km SE of this epicenter
- 7.0off the coast of Central AmericaAugust 16, 1909 · 248 km SW of this epicenter
- 6.78 km S of San Juan Opico, El SalvadorJune 8, 1917 · 159 km N of this epicenter
- 6.7100 km SSW of Intipucá, El SalvadorJune 29, 1919 · 78 km E of this epicenter
- 6.5off the coast of Central AmericaSeptember 23, 1916 · 273 km SW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 30 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 7,292 recorded deaths. The most severe:
- 1917M6.0
Guatemala City
26 Dec 1917 · 297 km away · intensity IX
2,650 deathsExtreme damage ($25M+)
- 1902M7.5
Quezaltenango, San Marcos
19 Apr 1902 · 278 km away
2,000 deathsSevere damage ($5–24M)tsunami
- 1854
San Salvador
14 Apr 1854 · 155 km away
1,000 deathsExtreme damage ($25M+)
- 1873
Santa Tomas, San Vicente
4 Mar 1873 · 137 km away
800 deathsExtreme damage ($25M+)
- 1874M7.1
Antigua,Chimaltenango,Amatitlan
3 Sep 1874 · 295 km away · intensity VIII
300 deathsSevere damage ($5–24M)
- 1873
Salvador,San Vicente
11 Apr 1873 · 132 km away
300 deaths
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.