Reviewed by USGSPeru7y ago
M4.5 earthquake 46 km SSW of Puerto Casma, Peru
Tuesday, November 20, 2018, 07:56:12 UTC · 9.858°S, 78.527°W
A magnitude 4.5 earthquake struck 46 km SSW of Puerto Casma, Peru on Tuesday, November 20, 2018, 07:56:12 UTC, at a depth of 64.4 km (shallow). It is the strongest earthquake within 300 km since an M5.4 on November 20, 2018.
- Magnitude
- 4.5
- Light · mb
- Depth
- 64 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
85 tons of TNT
That is about 1/178 of the Hiroshima bomb. A magnitude 5.0 releases about 6 times more energy.
Tectonic setting
179 km
from the nearest mapped plate boundary, between the Nazca and South American plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: shallow
64 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 has not published any M2.5+ earthquake within 50 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 180 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.221 km SE of Huacho, PeruMay 24, 1940 · 192 km SE of this epicenter
- 8.167 km W of Paramonga, PeruOctober 17, 1966 · 94 km S of this epicenter
- 7.934 km SW of Chimbote, PeruMay 31, 1970 · 75 km NW of this epicenter
- 7.677 km WSW of Callao, PeruOctober 3, 1974 · 279 km S of this epicenter
- 7.5123 km WSW of Puerto Santa, PeruFebruary 21, 1996 · 120 km W of this epicenter
- 7.155 km SW of Santiago de Cao, PeruJune 21, 1937 · 213 km NW of this epicenter
- 7.0179 km WSW of Huarmey, PeruSeptember 3, 1967 · 154 km SW of this epicenter
- 6.928 km W of Paramonga, PeruSeptember 24, 1963 · 100 km SE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 31 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 75,479 recorded deaths. The most severe:
- 1970M7.9
Northern, Pisco, Chiclayo
31 May 1970 · 79 km away · intensity X
66,794 deaths$530 million damagetsunami
- 1746M8.0
Lima, Callao
29 Oct 1746 · 278 km away · intensity XI
5,941 deathsExtreme damage ($25M+)tsunami
- 1725M7.7
Trujillo, Ancash, Lima
7 Jan 1725 · 109 km away · intensity IX
1,500 deathsSevere damage ($5–24M)
- 1946M7.3
Jocaibamba,Cerro Angaschaj,Cerro Sillapata
10 Nov 1946 · 188 km away · intensity XI
800 deathsSevere damage ($5–24M)
- 1940M8.2
Peru
24 May 1940 · 182 km away · intensity X
179 deathsSevere damage ($5–24M)tsunami
- 1966M8.1
Lima,Huacho,Huaura, Chancay,Supe,San Nicolas
17 Oct 1966 · 100 km away · intensity IX
110 deaths$35 million damagetsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.