QuakeScout
Magnitude6.7

Reviewed by USGSPeru108y ago

M6.7 earthquake 103 km SSW of Atico, Peru

Saturday, September 13, 1919, 12:19:23 UTC · 17.059°S, 74.034°W

A magnitude 6.7 earthquake struck 103 km SSW of Atico, Peru on Saturday, September 13, 1919, 12:19:23 UTC, at a depth of 30.0 km (shallow). It is the strongest earthquake within 300 km since an M6.9 on October 3, 1916.

Magnitude
6.7
Strong · mw
Depth
30 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

147 kilotons of TNT

That is about 10 times the Hiroshima bomb. It released about 309 times the energy of a magnitude 5.0.

Tectonic setting

20 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

30 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 4 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

  1. 7.737 km SSW of Atico, PeruAugust 6, 1913 · 66 km NE of this epicenter
  2. 7.212 km NNE of Cono Norte, PeruFebruary 26, 1914 · 281 km E of this epicenter
  3. 6.913 km SSW of San Juan, PeruOctober 3, 1916 · 256 km N of this epicenter
  4. 6.7165 km SSW of Atiquipa, PeruJuly 28, 1913 · 102 km W 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 579 recorded deaths. The most severe:

  1. 1784M8.0

    Arequipa,Camana,Moquegua,Tambo

    13 May 1784 · 225 km away · intensity X

    383 deathsSevere damage ($5–24M)tsunami

  2. 1821

    Camana, Ocona, Caraveli

    10 Jul 1821 · 155 km away · intensity VIII

    162 deathsSevere damage ($5–24M)

  3. 1914

    Pararca,Paysa,Colta,Oyala

    2 Dec 1914 · 225 km away · intensity X

    34 deathsSevere damage ($5–24M)

  4. 1913M7.9

    Caraveli, Chuquibamba, Ocona, Atico

    6 Aug 1913 · 7 km away · intensity X

    Severe damage ($5–24M)tsunami

  5. 1725

    Callao

    27 Mar 1725 · 151 km away · intensity VII

    Moderate damage ($1–5M)tsunami

  6. 1914

    Caraveli,Nazca,Ica,Atico

    11 Sep 1914 · 196 km away · intensity VII

    Moderate damage ($1–5M)

NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.

Nearby trackers

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