Reviewed by USGSGuatemala51y ago
M4.2 earthquake 8 km SSE of Joyabaj, Guatemala
Tuesday, February 10, 1976, 02:28:39 UTC · 14.921°N, 90.778°W
A magnitude 4.2 earthquake struck 8 km SSE of Joyabaj, Guatemala on Tuesday, February 10, 1976, 02:28:39 UTC, at a depth of 5.0 km (shallow).
- Magnitude
- 4.2
- Light · mb
- Depth
- 5 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
99 km
from the nearest mapped plate boundary, between the Caribbean and North American plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
5 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 3 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M5.2 on March 9, 1976. 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 189 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 · 210 km SE of this epicenter
- 7.726 km SSW of La Gomera, GuatemalaAugust 6, 1942 · 125 km S of this epicenter
- 7.57 km N of Los Amates, GuatemalaFebruary 4, 1976 · 186 km E of this epicenter
- 7.34 km SSW of Puerto Madero, MexicoDecember 14, 1935 · 180 km W of this epicenter
- 7.334 km SW of Puerto Madero, MexicoApril 29, 1970 · 203 km W of this epicenter
- 7.21 km NNW of Champerico, GuatemalaOctober 23, 1950 · 140 km SW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 43 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 31,564 recorded deaths. The most severe:
- 1976M7.5
Chimaltenango, Guatemala City
4 Feb 1976 · 186 km away · intensity IX
23,000 deaths$2.1 billion damagetsunami
- 1917M6.0
Guatemala City
26 Dec 1917 · 41 km away · intensity IX
2,650 deathsExtreme damage ($25M+)
- 1902M7.5
Quezaltenango, San Marcos
19 Apr 1902 · 105 km away
2,000 deathsSevere damage ($5–24M)tsunami
- 1854
San Salvador
14 Apr 1854 · 211 km away
1,000 deathsExtreme damage ($25M+)
- 1873
Santa Tomas, San Vicente
4 Mar 1873 · 228 km away
800 deathsExtreme damage ($25M+)
- 1773
St. Jago
3 Jun 1773 · 37 km away
600 deathsExtreme damage ($25M+)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.