Reviewed by USGSPeru114y ago
M6.7 earthquake 165 km SSW of Atiquipa, Peru
Monday, July 28, 1913, 05:39:19 UTC · 17.167°S, 74.984°W
A magnitude 6.7 earthquake struck 165 km SSW of Atiquipa, Peru on Monday, July 28, 1913, 05:39:19 UTC, at a depth of 15.0 km (shallow). No earthquake of this size or larger appears within 300 km in the USGS catalog since 1900.
- Magnitude
- 6.7
- 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
194 kilotons of TNT
That is about 13 times the Hiroshima bomb. It released about 407 times the energy of a magnitude 5.0.
Tectonic setting
55 km
from the nearest mapped plate boundary, between the Nazca and Altiplano 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 no earlier M5.0+ earthquakes within 300 km.
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 6 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 162 recorded deaths. The most severe:
- 1821
Camana, Ocona, Caraveli
10 Jul 1821 · 245 km away · intensity VIII
162 deathsSevere damage ($5–24M)
- 1913M7.9
Caraveli, Chuquibamba, Ocona, Atico
6 Aug 1913 · 106 km away · intensity X
Severe damage ($5–24M)tsunami
- 1725
Callao
27 Mar 1725 · 251 km away · intensity VII
Moderate damage ($1–5M)tsunami
- 1913M7.0
Arequipa
28 Jul 1913 · 190 km away · intensity IX
Limited damage (under $1M)tsunami
- 1868
Lima, Arequipa, Arica
2 Oct 1868 · 265 km away
Limited damage (under $1M)tsunami
- 1869
Arequipa
19 Aug 1869 · 143 km away
Limited damage (under $1M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.