Reviewed by USGSMexico99y ago
M6.1 earthquake 106 km SSE of El Carrizal, Mexico
Friday, April 13, 1928, 23:16:19 UTC · 15.152°N, 95.083°W
A magnitude 6.1 earthquake struck 106 km SSE of El Carrizal, Mexico on Friday, April 13, 1928, 23:16:19 UTC, at a depth of 25.0 km (shallow). It is the strongest earthquake within 300 km since an M7.4 on March 22, 1928.
- Magnitude
- 6.1
- Strong · mw
- Depth
- 25 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
23 kilotons of TNT
That is about 2 times the Hiroshima bomb. It released about 48 times the energy of a magnitude 5.0.
Tectonic setting
27 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
25 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 17 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.82 km NW of Teojomulco, MexicoApril 15, 1907 · 282 km NW of this epicenter
- 7.48 km ENE of Santiago Xanica, MexicoMarch 22, 1928 · 151 km NW of this epicenter
- 7.2127 km SW of La Esperanza (El Zapotal), MexicoMarch 30, 1914 · 133 km SE of this epicenter
- 7.231 km S of San Francisco Cozoaltepec, MexicoDecember 29, 1917 · 184 km W of this epicenter
- 7.07 km N of Jesús Carranza, MexicoJune 2, 1916 · 262 km N of this epicenter
- 6.94 km NNW of El Palmarcito, MexicoDecember 10, 1925 · 203 km E of this epicenter
- 6.933 km WSW of Puerto Madero, MexicoDecember 9, 1912 · 262 km E of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 24 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 35 recorded deaths. The most severe:
- 1870M7.9
Oaxaca,Zanaguia,San Francisco Ozolotepec
11 May 1870 · 133 km away
24 deathsSevere damage ($5–24M)tsunami
- 1801M7.0
Oaxaca
5 Oct 1801 · 159 km away
7 deathsSevere damage ($5–24M)
- 1928M7.7
Oaxaca
17 Jun 1928 · 231 km away
4 deathsModerate damage ($1–5M)tsunami
- 1845M7.5
Oaxaca
9 Mar 1845 · 261 km away · intensity V
Severe damage ($5–24M)
- 1872M7.4
Oaxaca,Mexico City
27 Mar 1872 · 211 km away · intensity VII
Severe damage ($5–24M)
- 1897M7.0
Oaxaca: Tehuantepec
5 Jun 1897 · 243 km away
Severe damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.