Reviewed by USGSMexico97y ago
M6.1 earthquake 128 km SSE of Puerto Ángel, Mexico
Thursday, January 29, 1931, 17:10:17 UTC · 14.555°N, 96.157°W
A magnitude 6.1 earthquake struck 128 km SSE of Puerto Ángel, Mexico on Thursday, January 29, 1931, 17:10:17 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M6.4 on January 16, 1931.
- Magnitude
- 6.1
- Strong · mw
- Depth
- 15 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
24 kilotons of TNT
That is about 2 times the Hiroshima bomb. It released about 51 times the energy of a magnitude 5.0.
Tectonic setting
86 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
15 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 32 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.015 km ESE of San Gabriel Mixtepec, MexicoJune 17, 1928 · 188 km NW of this epicenter
- 7.82 km NW of Teojomulco, MexicoApril 15, 1907 · 256 km NW of this epicenter
- 7.65 km SSW of San Miguel Suchixtepec, MexicoJanuary 15, 1931 · 170 km N of this epicenter
- 7.56 km WSW of San Miguel Panixtlahuaca, MexicoOctober 9, 1928 · 231 km NW of this epicenter
- 7.48 km ENE of Santiago Xanica, MexicoMarch 22, 1928 · 165 km N of this epicenter
- 7.440 km S of Corralero, MexicoAugust 4, 1928 · 267 km NW of this epicenter
- 7.2127 km SW of La Esperanza (El Zapotal), MexicoMarch 30, 1914 · 235 km E of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 28 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 39 recorded deaths. The most severe:
- 1870M7.9
Oaxaca,Zanaguia,San Francisco Ozolotepec
11 May 1870 · 95 km away
24 deathsSevere damage ($5–24M)tsunami
- 1801M7.0
Oaxaca
5 Oct 1801 · 183 km away
7 deathsSevere damage ($5–24M)
- 1854M7.7
Veracruz,Oaxaca
5 May 1854 · 259 km away · intensity IX
4 deathsSevere damage ($5–24M)
- 1928M7.7
Oaxaca
17 Jun 1928 · 189 km away
4 deathsModerate damage ($1–5M)tsunami
- 1845M7.5
Oaxaca
9 Mar 1845 · 245 km away · intensity V
Severe damage ($5–24M)
- 1872M7.4
Oaxaca,Mexico City
27 Mar 1872 · 210 km away · intensity VII
Severe damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.