Reviewed by USGSPeru97y ago
M6.6 earthquake 91 km SSW of Santiago, Peru
Wednesday, June 25, 1930, 21:21:42 UTC · 14.945°S, 76.049°W
A magnitude 6.6 earthquake struck 91 km SSW of Santiago, Peru on Wednesday, June 25, 1930, 21:21:42 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M6.9 on October 3, 1916.
- Magnitude
- 6.6
- Strong · mw
- Depth
- 15 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- VI
- Strong (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
133 kilotons of TNT
That is about 9 times the Hiroshima bomb. It released about 279 times the energy of a magnitude 5.0.
Tectonic setting
48 km
from the nearest mapped plate boundary, between the Nazca and South 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 7 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 6.913 km SSW of San Juan, PeruOctober 3, 1916 · 193 km E of this epicenter
- 6.7165 km SSW of Atiquipa, PeruJuly 28, 1913 · 272 km SE of this epicenter
- 6.512 km S of Chiara, PeruJanuary 9, 1921 · 265 km NE of this epicenter
- 6.3144 km W of Paracas, PeruApril 6, 1922 · 191 km NW of this epicenter
- 6.29 km S of San Juan, PeruJune 25, 1930 · 112 km SE of this epicenter
- 5.9108 km W of Paracas, PeruJanuary 18, 1928 · 165 km NW of this epicenter
- 5.784 km WNW of San Juan, PeruJune 5, 1926 · 22 km SE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 9 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 32 recorded deaths. The most severe:
- 1813
Ica
30 Mar 1813 · 117 km away · intensity VII
32 deathsModerate damage ($1–5M)
- 1914
Caraveli,Nazca,Ica,Atico
11 Sep 1914 · 284 km away · intensity VII
Moderate damage ($1–5M)
- 1869
Arequipa
19 Aug 1869 · 281 km away
Limited damage (under $1M)tsunami
- 1716M8.6
Peru
11 Feb 1716 · 139 km away · intensity X
- 1846M7.9
Peru
28 Jun 1846 · 133 km away · intensity VI
- 1907M7.6
Peru
23 Feb 1907 · 206 km away
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.