QuakeScout
Magnitude6.1

Reviewed by USGSPeru2y ago

M6.1 earthquake 34 km SW of Atiquipa, Peru

Saturday, June 29, 2024, 07:05:32 UTC · 16.049°S, 74.556°W

A magnitude 6.1 earthquake struck 34 km SW of Atiquipa, Peru on Saturday, June 29, 2024, 07:05:32 UTC, at a depth of 18.0 km (shallow). USGS received 11 “Did You Feel It?” reports, with a maximum reported intensity of VII (very strong). The USGS PAGER alert is green: low likelihood of casualties and damage. It is the strongest earthquake within 300 km since an M7.2 on June 28, 2024.

Magnitude
6.1
Strong · mww
Depth
18 km
Shallow
Felt reports
11
Max intensity VII
Est. shaking
VI
Strong (ShakeMap)
PAGER alert
Green
Impact estimate
Tsunami
No flag
USGS feed

Outlined circle: this earthquakeDashed circle: 100 km aftershock search areaColoured lines: estimated shaking intensity (USGS ShakeMap)

In context

How big was it, and why here?

Energy released

21 kilotons of TNT

That is about the energy of the Hiroshima bomb. It released about 45 times the energy of a magnitude 5.0.

Tectonic setting

72 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

18 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

Reports sent by people to USGS, grouped by place (most reports first). Intensity uses the Modified Mercalli scale (I–X): what people felt, not the magnitude.

PlaceIntensityReportsDistance
Acarí, Arequipa, PeruVI · Strong671 km
Arequipa, Arequipa, PeruIII · Weak1326 km
Ica, Ica, PeruII · Weak1255 km
Vicuña, Coquimbo, ChileII · Weak11597 km
Lima, Lima Provincias, PeruII · Weak1516 km
Vista Alegre, Ica, PeruII · Weak1254 km
I felt it — report to USGS ↗

USGS PAGER estimate

Who was exposed to shaking

Modelled from the ShakeMap and population data. Alert level green: low likelihood of casualties and damage.

VI · Strong shaking
1,500 people
V · Moderate shaking
21,000 people
IV · Light shaking
200,000 people
III · Weak shaking
119,000 people

Estimated shaking in nearby towns

  • ChalaPopulation 0VI · Strong
  • YaucaPopulation 0V · Moderate
  • AtiquipaPopulation 0V · Moderate
  • LomasPopulation 0V · Moderate
  • AcariPopulation 4,400V · Moderate
  • TocotaPopulation 0IV · Light
  • Minas de MarconaPopulation 15,000IV · Light
  • NazcaPopulation 24,000IV · Light

After the main event

Aftershocks within 100 km

USGS lists 12 M2.5+ earthquakes within 100 km in the following 30 days; the largest was M5.8 on July 12, 2024. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.

M3M4M5M61h6h1d3d7d14d30dMainshock M6.1
Time after the mainshock on a logarithmic scale (first hours stretched), magnitude on the vertical axis. M2.5+ events from USGS.
  1. 4.632 km WSW of Atiquipa, Peru2y ago · 17 km NW of this epicenter
  2. 4.847 km WSW of Atiquipa, Peru2y ago · 25 km W of this epicenter
  3. 5.824 km SW of Acarí, Peru2y ago · 61 km NW of this epicenter
  4. 4.253 km SW of Atiquipa, Peru2y ago · 20 km SW of this epicenter
  5. 4.551 km WSW of Atiquipa, Peru2y ago · 29 km W of this epicenter
  6. 5.459 km WSW of Atiquipa, Peru2y ago · 38 km W of this epicenter
  7. 4.846 km W of Atiquipa, Peru2y ago · 32 km NW of this epicenter
  8. 5.356 km WSW of Atiquipa, Peru2y ago · 35 km W of this epicenter

Regional history

Past M5+ earthquakes within 300 km

USGS lists 515 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

  1. 8.46 km SSW of Atico, PeruJune 23, 2001 · 101 km E of this epicenter
  2. 8.121 km NNE of Minas de Marcona, PeruAugust 24, 1942 · 123 km NW of this epicenter
  3. 7.737 km SSW of Atico, PeruAugust 6, 1913 · 103 km SE of this epicenter
  4. 7.760 km SW of Changuillo, PeruNovember 12, 1996 · 168 km NW of this epicenter
  5. 7.235 km N of El Cardo, PeruOctober 11, 1922 · 199 km E of this epicenter
  6. 7.210 km WSW of Atiquipa, PeruJune 28, 2024 · 27 km NE of this epicenter
  7. 7.121 km SSE of Nazca, PeruJanuary 15, 1960 · 120 km N of this epicenter
  8. 7.130 km SW of Islay (Matarani), PeruApril 12, 1988 · 271 km SE of this epicenter

History · NOAA

Deadliest earthquakes in this area

NOAA’s significant-earthquake database lists 42 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 1,060 recorded deaths. The most severe:

  1. 1784M8.0

    Arequipa,Camana,Moquegua,Tambo

    13 May 1784 · 277 km away · intensity X

    383 deathsSevere damage ($5–24M)tsunami

  2. 1821

    Camana, Ocona, Caraveli

    10 Jul 1821 · 170 km away · intensity VIII

    162 deathsSevere damage ($5–24M)

  3. 1913M6.3

    Amyaraes, Abancay, Casaya, Soraya

    4 Nov 1913 · 272 km away · intensity X

    150 deathsSevere damage ($5–24M)

  4. 2001M8.4

    Arequipa, Moquegua, Tacna, Ayacucho

    23 Jun 2001 · 101 km away · intensity VIII

    103 deaths$200 million damagetsunami

  5. 1960M7.8

    Arequipa,Chuquibamba,Caraveli,Cotahuasi

    13 Jan 1960 · 196 km away · intensity X

    63 deathsSevere damage ($5–24M)tsunami

  6. 1914

    Pararca,Paysa,Colta,Oyala

    2 Dec 1914 · 173 km away · intensity X

    34 deathsSevere damage ($5–24M)

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

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