Reviewed by USGSEl Salvador25y ago
M4.4 earthquake 6 km NNW of Lolotique, El Salvador
Sunday, March 11, 2001, 01:45:45 UTC · 13.607°N, 88.368°W
A magnitude 4.4 earthquake struck 6 km NNW of Lolotique, El Salvador on Sunday, March 11, 2001, 01:45:45 UTC, at a depth of 185.4 km (intermediate).
- Magnitude
- 4.4
- Light · mb
- Depth
- 185 km
- Intermediate
- 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
60 tons of TNT
That is about 1/251 of the Hiroshima bomb. A magnitude 5.0 releases about 8 times more energy.
Tectonic setting
187 km
from the nearest mapped plate boundary, between the Caribbean and Cocos plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: intermediate
185 km
Intermediate-depth earthquakes usually break inside a plate that is sinking into the mantle. Shaking spreads over a wide area but is gentler at the epicenter than a shallow quake of the same size.
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 2 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M4.3 on March 14, 2001. 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 423 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 · 90 km NW of this epicenter
- 7.783 km SSW of Corinto, NicaraguaSeptember 2, 1992 · 235 km SE of this epicenter
- 7.728 km SSW of Puerto El Triunfo, El SalvadorJanuary 13, 2001 · 70 km SW of this epicenter
- 7.57 km N of Los Amates, GuatemalaFebruary 4, 1976 · 207 km N of this epicenter
- 7.318 km SSW of La Libertad, El SalvadorJune 19, 1982 · 114 km W of this epicenter
- 7.27 km SW of El Viejo, NicaraguaMarch 28, 1921 · 167 km SE of this epicenter
- 7.2116 km SW of Corinto, NicaraguaJuly 1, 1907 · 223 km S of this epicenter
- 7.1113 km SSW of Puerto El Triunfo, El SalvadorFebruary 8, 1926 · 154 km S of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 71 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 48,561 recorded deaths. The most severe:
- 1976M7.5
Chimaltenango, Guatemala City
4 Feb 1976 · 207 km away · intensity IX
23,000 deaths$2.1 billion damagetsunami
- 1972M6.2
Managua
23 Dec 1972 · 280 km away
10,000 deaths$3.0 billion damage
- 1917M6.0
Guatemala City
26 Dec 1917 · 265 km away · intensity IX
2,650 deathsExtreme damage ($25M+)
- 1931M5.6
Managua
31 Mar 1931 · 292 km away
2,450 deaths$15 million damage
- 1902M7.5
Quezaltenango, San Marcos
19 Apr 1902 · 288 km away
2,000 deathsSevere damage ($5–24M)tsunami
- 1986M5.4
San Salvador
10 Oct 1986 · 85 km away
1,100 deaths$1.5 billion damage
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.