Reviewed by USGSMexico8h ago
M4.2 earthquake 120 km WSW of Puerto Madero, Mexico
Saturday, September 26, 2026, 17:30:17 UTC · 14.223°N, 93.411°W
A magnitude 4.2 earthquake struck 120 km WSW of Puerto Madero, Mexico on Saturday, September 26, 2026, 17:30:17 UTC, at a depth of 10.0 km (shallow).
- Magnitude
- 4.2
- Light · mb
- Depth
- 10 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 earthquake
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
34 km
from the nearest mapped plate boundary, between the Cocos and North American 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 50 km
USGS has not published any M2.5+ earthquake within 50 km since this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 845 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.22017 Tehuantepec, Mexico EarthquakeSeptember 8, 2017 · 103 km NW of this epicenter
- 7.726 km SSW of La Gomera, GuatemalaAugust 6, 1942 · 246 km E of this epicenter
- 7.433 km S of Champerico, GuatemalaNovember 7, 2012 · 166 km E of this epicenter
- 7.34 km SSW of Puerto Madero, MexicoDecember 14, 1935 · 117 km NE of this epicenter
- 7.360 km WSW of Puerto Madero, MexicoJuly 17, 2026 · 62 km NE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 39 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 3,262 recorded deaths. The most severe:
- 1902M7.5
Quezaltenango, San Marcos
19 Apr 1902 · 261 km away
2,000 deathsSevere damage ($5–24M)tsunami
- 1773
St. Jago
3 Jun 1773 · 295 km away
600 deathsExtreme damage ($25M+)tsunami
- 1874M7.1
Antigua,Chimaltenango,Amatitlan
3 Sep 1874 · 294 km away · intensity VIII
300 deathsSevere damage ($5–24M)
- 1773M7.5
Antigua
29 Jul 1773 · 295 km away · intensity VIII
100 deathsModerate damage ($1–5M)
- 2017M8.2
Oaxaca, Chiapas, Tabasco; Guatemala
8 Sep 2017 · 103 km away · intensity IX
98 deaths$4.0 billion damagetsunami
- 2012M7.3
San Marcos, San Cristobal Cochu
7 Nov 2012 · 166 km away
48 deaths$210 million damagetsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.