A powerful earthquake in Chile defied expectations. The magnitude 7.4 quake struck northern Chile near Calama in July 2024. Scientists now believe a hidden, deep-seated force supercharged the event.
The quake originated far deeper than typical Chilean megathrust earthquakes. It ruptured through hotter rock layers than previously thought possible. This unexpected rupture was fueled by a rare, heat-driven chain reaction. The University of Texas at Austin led the research, published January 1, 2026.
The shaking damaged buildings and disrupted power across the region. While not as devastating as some Chilean quakes, its unusual nature surprised experts. The deep rupture challenges existing models of earthquake behavior.
Chile is highly susceptible to major earthquakes. The country experienced the largest earthquake ever recorded in 1960. That magnitude 9.5 event triggered a massive tsunami.
Researchers are now re-evaluating earthquake risk assessment. Understanding these deep-seated forces is crucial. Further studies will focus on identifying other regions with similar potential for unexpected, powerful earthquakes.
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