Reviewed by USGSPeru69y ago
M7.5 earthquake 81 km SSE of Puerto Rosario de Laberinto, Peru
Saturday, July 26, 1958, 17:37:14 UTC · 13.428°S, 69.388°W
A magnitude 7.5 earthquake struck 81 km SSE of Puerto Rosario de Laberinto, Peru on Saturday, July 26, 1958, 17:37:14 UTC, at a depth of 612.4 km (deep). No earthquake of this size or larger appears within 300 km in the USGS catalog since 1900.
- Magnitude
- 7.5
- Major · mw
- Depth
- 612 km
- Deep
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- III
- Weak (ShakeMap)
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquakeColoured lines: estimated shaking intensity (USGS ShakeMap)
In context
How big was it, and why here?
Energy released
2.7 megatons of TNT
That is about 178 times the Hiroshima bomb. It released about 5,623 times the energy of a magnitude 5.0.
Tectonic setting
14 km
from the nearest mapped plate boundary, between the Altiplano and South American plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: deep
612 km
Deep earthquakes (over 300 km) happen deep inside subducting plates. They rarely cause damage, but can be felt faintly over very large distances.
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 200 km
USGS has not published any M2.5+ earthquake within 200 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 6 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 6.741 km NE of Corani, PeruApril 9, 1928 · 105 km W of this epicenter
- 6.7central PeruApril 26, 1905 · 225 km NW of this epicenter
- 6.557 km NNE of Salvación, PeruOctober 7, 1920 · 218 km NW of this epicenter
- 6.541 km S of Mazuko, PeruApril 27, 1928 · 110 km W of this epicenter
- 6.45 km WNW of Mapiri, BoliviaFebruary 24, 1947 · 237 km SE of this epicenter
- 6.336 km W of Mapiri, BoliviaAugust 23, 1956 · 219 km SE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 11 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 374 recorded deaths. The most severe:
- 1707M5.8
Cuzco
17 Sep 1707 · 298 km away · intensity X
160 deaths
- 1950M6.0
Cusco
21 May 1950 · 283 km away · intensity VII
129 deathsSevere damage ($5–24M)
- 1943M5.0
Yanacoa, Pampamarca
31 Jan 1943 · 244 km away
75 deathsModerate damage ($1–5M)
- 1928M6.7
Peru
9 Apr 1928 · 105 km away · intensity IX
10 deathsSevere damage ($5–24M)tsunami
- 1947M6.4
Conzata
24 Feb 1947 · 237 km away
Severe damage ($5–24M)
- 1747
Carabaya Province: Ayapata
1747 · 116 km away · intensity IX
Severe damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.