Reviewed by USGSMexico57y ago
M5.7 earthquake 64 km SW of Puerto Madero, Mexico
Friday, May 15, 1970, 09:44:45 UTC · 14.261°N, 92.789°W
A magnitude 5.7 earthquake struck 64 km SW of Puerto Madero, Mexico on Friday, May 15, 1970, 09:44:45 UTC, at a depth of 31.9 km (shallow). It is the strongest earthquake within 300 km since an M5.8 on May 2, 1970.
- Magnitude
- 5.7
- Moderate · mw
- Depth
- 32 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
6 kilotons of TNT
That is about 1/3 of the Hiroshima bomb. It released about 12 times the energy of a magnitude 5.0.
Tectonic setting
63 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
32 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 75 km
USGS has not published any M2.5+ earthquake within 75 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 133 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.726 km SSW of La Gomera, GuatemalaAugust 6, 1942 · 181 km E of this epicenter
- 7.34 km SSW of Puerto Madero, MexicoDecember 14, 1935 · 61 km NE of this epicenter
- 7.334 km SW of Puerto Madero, MexicoApril 29, 1970 · 30 km NE of this epicenter
- 7.2127 km SW of La Esperanza (El Zapotal), MexicoMarch 30, 1914 · 134 km W of this epicenter
- 7.21 km NNW of Champerico, GuatemalaOctober 23, 1950 · 94 km E of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 19 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 5,693 recorded deaths. The most severe:
- 1917M6.0
Guatemala City
26 Dec 1917 · 239 km away · intensity IX
2,650 deathsExtreme damage ($25M+)
- 1902M7.5
Quezaltenango, San Marcos
19 Apr 1902 · 195 km away
2,000 deathsSevere damage ($5–24M)tsunami
- 1773
St. Jago
3 Jun 1773 · 228 km away
600 deathsExtreme damage ($25M+)tsunami
- 1874M7.1
Antigua,Chimaltenango,Amatitlan
3 Sep 1874 · 227 km away · intensity VIII
300 deathsSevere damage ($5–24M)
- 1773M7.5
Antigua
29 Jul 1773 · 228 km away · intensity VIII
100 deathsModerate damage ($1–5M)
- 1816M7.5
Soloma
22 Jul 1816 · 195 km away · intensity IX
23 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.