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MediumLandslide risk after an earthquakeCS: 18 · v1

Landslide risk after an earthquake in Peru

PeruUSGS

Right now

The most recent data we hold from USGS arrived 17 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.

Nothing else has been detected within 20 km in the last 24 hours.

Distance and hazards
Only these hazards

Tick none to hear about every hazard.

One message per event, not per detection. We send a confirmation first, and every message carries a link to stop them. We store the address and the place, nothing else.

Reported by USGS 50 days ago.

It is the only one we have recorded within 20 km of this point since 20 August 2026.

What the source measured

USGS reported: M6.7 earthquake near 31 km NW of Aniso, Peru has triggered ground failure alerts. Landslide alert: yellow. Landslide probability: 10.0%. Depth: 99.0 km

How we know

One source: USGS. Not yet confirmed by a second, independent source.

Our own score for this event is 18 out of 100.

This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.

Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.

Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.

This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.

Event data

TypeLandslide risk after an earthquake
SeverityMedium
Calamity Score (ours)18 / 100
Legacy data-support index0.50/1
Coordinates-14.6414, -73.5236
Nearest cityAndahuaylas (110 km)
Urban exposure index (PEI)0 within 10 km
Impact tierminor
Timestamp2026-08-20T18:00:18.626Z
Sourcehttps://earthquake.usgs.gov/earthquakes/eventpage/us6000tm81
LicenceUS public domain · USGS Landslide Hazards Program

Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.

Source and revision timeline

Source: usgs_landslide. Occurrence: 2026-08-20T18:00:18.626Z.

First archived: 2026-08-21T05:45:02.377Z. Material modification: not recorded.

Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.

Score breakdown

40
intensity
0
Urban PEI term
0
Scenario weight
20
Recorded reference / batch anomaly

Technical details

Magnitude6.7
Place31 km NW of Aniso, Peru
DepthKm99
LandslideAlertyellow
LandslideProb0.1
LiquefactionProb0
QuakeIdus6000tm81

Safety information

What to do in a landslide

Three things first, then the warning signs and what to do before, during and after. From FEMA’s Ready.gov.

For this reportLandslide risk after an earthquake · Peru

  1. Get out of its path

    Move quickly uphill or to the side, away from the slide and from the valley below it.

    Ready.gov

  2. Listen in heavy rain

    Cracking trees, knocking boulders, a rumble growing louder: leave at once, even at night.

    Ready.gov

  3. Do not cross flowing mud

    Never drive or walk across a road or bridge covered by moving water or mud.

    Ready.gov

Before, during, after. Here it is “after”.

Before · If you live on or below a slope

  • Learn the slow signs

    Doors that stick, new cracks, tilting walls, poles or trees, water springing from new places.

  • Get the alerts

    And a plan to leave.

  • Ask an expert

    About the ground around your house.

Ready.gov (FEMA)

During · In heavy or long rain

  • Stay awake and alert

    Many deadly slides happen at night.

  • Avoid valleys and low ground

    Debris flows run along them.

Ready.gov (FEMA)

After · When it has moved

  • Keep away

    More slides can follow.

  • Watch for flooding

    It often comes after a slide.

  • Report damage

    Broken pipes, lines and roads, to the authorities.

Ready.gov (FEMA)

If a life is in danger

Emergency numbers: Peru

Questions people ask

What are the warning signs of a landslide?

Sudden: rushing water and mud, cracking trees, a growing rumble. Slow: sticking doors, new cracks, tilting walls, fences or trees, water appearing in new places. Source: Ready.gov (FEMA).

Are burned slopes more dangerous?

Yes. After a wildfire, heavy rain can turn bare slopes into debris flows. Source: Ready.gov (FEMA).

Sources, read on 4 October 2026

  1. Ready.gov (FEMA) — Landslides and debris flows

The advice is summarised from these pages, and the figures are theirs. Calamity.live is not an emergency service and this page is not an official alert: follow your local authorities.

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