Moderate Earthquake (M4.6) Reported Near 61 km E of La Tirana, Chile

Seismologists have recorded a magnitude 4.6 earthquake in Chile, with the epicentre located 61 km E of La Tirana, Chile. The event occurred at 10:24 UTC on Monday, July 27, 2026 and originated at a depth of 105.2 km.

Seismic Context for Chile

Chile runs along the subduction boundary where the Nazca Plate dives beneath the South American Plate — one of the most seismically active convergent boundaries on the planet. This setting has produced the largest instrumentally recorded earthquake in history.

Chile holds the record for the strongest earthquake ever measured: the 1960 Valdivia earthquake at magnitude 9.5. More recently, the 2010 Maule earthquake (M8.8) and its associated tsunami caused widespread damage. Chileans have developed strong earthquake-preparedness culture over generations.

About This Event

With a focal depth of 105.2 km, this earthquake falls into the intermediate depth category (70–300 km). At this depth, seismic waves travel further before reaching the surface, spreading energy over a wider area. While shaking intensity at the epicentre is somewhat reduced compared to a shallow event of equal magnitude, an intermediate earthquake can be felt across a much larger region.

In terms of felt effects, a magnitude 4.6 earthquake is typically felt strongly by everyone; minor to moderate damage possible in vulnerable buildings. Moderate earthquakes are felt by virtually everyone near the epicentre. Strong shaking lasting 10–30 seconds can topple unsecured items, crack plaster, and cause poorly anchored objects to fall. Aftershocks are common following moderate events.

Understanding the Magnitude Scale

Earthquake magnitude is measured on a logarithmic scale — meaning each whole-number increase corresponds to roughly 32 times more energy released and approximately 10 times greater ground motion amplitude. A magnitude 4.6 event therefore releases significantly more energy than its number alone might suggest to the casual observer.

A magnitude 4.6 earthquake releases approximately roughly 500 tonnes of TNT of energy. For comparison, this exceeds the energy released by most conventional explosive events and is sufficient to shift tectonic stress in measurable ways across a wide region.

Significant damage can occur to vulnerable structures — particularly unreinforced masonry, old adobe buildings, and poorly maintained older construction. Well-engineered modern buildings are designed to withstand this level of shaking with minimal structural impact, though contents may shift and non-structural elements (ceilings, partitions) can be damaged.

What to Do After an Earthquake

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.

Keep an earthquake emergency kit accessible at home. It should include at least 72 hours of water (4 litres per person per day), non-perishable food, a first aid kit, torch, battery-powered radio, copies of important documents, and essential medications. Reviewing and restocking this kit annually is strongly recommended.

Staying Informed

SHOA (Servicio Hidrográfico y Oceanográfico de la Armada) manages tsunami warnings for Chile, while SENAPRED coordinates national disaster response. Evacuation routes and tsunami inundation maps are posted in most coastal communities.

QuakeWatch publishes real-time earthquake data sourced from the USGS global catalog — covering every detected seismic event worldwide, 24 hours a day. Visit our live map to see this and all other recent earthquakes, or explore our guide to earthquake magnitude for a deeper understanding of what these numbers mean in practice.

How QuakeWatch Tracks This Event

QuakeWatch sources earthquake data directly from the USGS ComCat (Comprehensive Catalog), which aggregates data contributed by seismic networks worldwide including JMA (Japan), EMSC (Europe and Mediterranean), GFZ (Germany and global), Geoscience Australia, and dozens of national and regional networks. This data is refreshed every 60 seconds, ensuring that new earthquakes appear on our live map within minutes of being processed by the USGS. You can also submit a felt report for this earthquake directly on its detail page.