Reviewed by USGSPeru13y ago
M4.3 earthquake 77 km WSW of Changuillo, Peru
Wednesday, October 16, 2013, 18:58:39 UTC · 14.940°S, 75.882°W
A magnitude 4.3 earthquake struck 77 km WSW of Changuillo, Peru on Wednesday, October 16, 2013, 18:58:39 UTC, at a depth of 48.3 km (shallow).
- Magnitude
- 4.3
- Light · mb
- Depth
- 48 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 earthquakeDashed circle: 50 km aftershock search area
In context
How big was it, and why here?
Energy released
43 tons of TNT
That is about 1/354 of the Hiroshima bomb. A magnitude 5.0 releases about 11 times more energy.
Tectonic setting
51 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: shallow
48 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 50 km
USGS lists 4 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M4.7 on November 11, 2013. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 333 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.46 km SSW of Atico, PeruJune 23, 2001 · 282 km SE of this epicenter
- 8.121 km NNE of Minas de Marcona, PeruAugust 24, 1942 · 93 km E of this epicenter
- 8.041 km SW of San Vicente de Cañete, PeruAugust 15, 2007 · 189 km NW of this epicenter
- 7.737 km SSW of Atico, PeruAugust 6, 1913 · 290 km SE of this epicenter
- 7.760 km SW of Changuillo, PeruNovember 12, 1996 · 23 km E of this epicenter
- 7.121 km SSE of Nazca, PeruJanuary 15, 1960 · 109 km E of this epicenter
- 7.116 km WSW of Atiquipa, PeruSeptember 25, 2013 · 178 km SE of this epicenter
- 6.939 km SW of Santiago, PeruOctober 28, 2011 · 57 km N of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 32 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 868 recorded deaths. The most severe:
- 2007M8.0
Ica, Pisco, Lima
15 Aug 2007 · 189 km away · intensity VIII
596 deaths$600 million damagetsunami
- 2001M8.4
Arequipa, Moquegua, Tacna, Ayacucho
23 Jun 2001 · 282 km away · intensity VIII
103 deaths$200 million damagetsunami
- 1914
Pararca,Paysa,Colta,Oyala
2 Dec 1914 · 289 km away · intensity X
34 deathsSevere damage ($5–24M)
- 1813
Ica
30 Mar 1813 · 107 km away · intensity VII
32 deathsModerate damage ($1–5M)
- 1942M8.2
Ica, Nazca
24 Aug 1942 · 14 km away · intensity IX
30 deathsSevere damage ($5–24M)tsunami
- 1996M7.7
Chincha Alta, Acari, Nazca, Marcona
12 Nov 1996 · 23 km away · intensity VIII
14 deathsExtreme damage ($25M+)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.