A magnitude 5.5 earthquake struck Peru at 02:24 UTC on Sunday, July 19, 2026, with its epicentre recorded 2 km WSW of Sicaya, Peru at a depth of 10.0 km. If you felt this earthquake, you are not alone — and your experience is scientifically valuable.
Did You Feel It?
Community felt reports are an important part of modern earthquake science. The USGS "Did You Feel It?" (DYFI) system collects reports from people who experienced shaking, generating intensity maps that complement instrumental data. These reports help seismologists understand how shaking varied across the affected region and can improve earthquake hazard assessments.
A magnitude 5.5 earthquake is capable of causing significant damage, particularly to older or poorly built structures. Strong earthquakes cause severe shaking that is difficult to stand through. Duration can reach 30–60 seconds. Widespread damage to ordinary buildings is common; even some well-built structures may sustain damage. Strong ground motion can trigger landslides, liquefaction of saturated soils, and rupturing of underground infrastructure.
Understanding the Event
At a focal depth of 10.0 km, this is classified as a shallow earthquake (0–70 km). Shallow events are typically the most damaging: the seismic energy has less distance to travel before reaching the surface, resulting in stronger and more abrupt ground shaking at the epicentre.
The energy released by a magnitude 5.5 earthquake is approximately the equivalent of a large mining explosion or small nuclear device. This is 32 times more energy than a magnitude 4.5 event — the logarithmic nature of the magnitude scale means each whole number increase represents about 32 times more energy.
Why Here? The Geology Behind the Earthquake
Peru lies along the Peru–Chile Trench where the Nazca Plate subducts beneath the South American Plate at roughly 7 cm per year, one of the fastest subduction rates on Earth. This builds enormous stress that is periodically released as powerful earthquakes.
Peru has experienced numerous devastating earthquakes, most notably the 1970 Ancash earthquake (M7.9, ~70,000 deaths — one of the deadliest in the Western Hemisphere) and the 2007 Pisco earthquake (M8.0). The coastal cities of Lima and Callao face significant hazard from both seismic and tsunami risks.
Structural Considerations
This magnitude class poses a serious threat to older and poorly constructed buildings. Collapse is possible in the most vulnerable structures. Modern seismically designed buildings are expected to remain standing, though repair or demolition may be necessary after inspection.
If you are in the affected area and notice damage to your building — cracks in load-bearing walls, shifted foundations, or distorted door frames — treat this as a potential sign of structural compromise and seek professional assessment before resuming normal occupation.
Safety Reminders
The internationally recommended action during earthquake shaking is Drop, Cover, and Hold On: drop to your hands and knees, take cover under a sturdy table or desk (or protect your head with your arms if no shelter is available), and hold on until shaking stops. Do not run outside during shaking — most injuries occur when people attempt to move.
Fasten heavy furniture — bookshelves, water heaters, cabinets — to walls using earthquake straps. Store breakable items on lower shelves and heavy items closest to the floor. These simple steps significantly reduce the risk of injury from falling objects.
Peru's Instituto Geofísico del Perú (IGP) monitors seismic activity. INDECI (Instituto Nacional de Defensa Civil) coordinates emergency response.
Share Your Experience on QuakeWatch
You can submit your own felt report directly on this earthquake's detail page on QuakeWatch. Your input — describing intensity, location, and what you observed — contributes to a richer picture of how this earthquake affected communities across the region. Visit our live map and click on this event to add your report.
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