The 2 earthquakes that struck Venezuela are known as a 'doublet.' Here's what to know about them

Venezuela's northern coast experienced a devastating event known as a 'doublet' earthquake, a rare phenomenon where two powerful quakes of similar magnitude strike in close proximity in time and location. The seismic event, which occurred on Wednesday evening, began with a 7.2 magnitude quake, immediately followed 39 seconds later by a 7.5 magnitude tremor. This deadly one-two punch toppled buildings across Venezuela's capital, Caracas, and surrounding areas, resulting in over 180 fatalities, approximately 1,500 injuries, and thousands reported missing. The coastal region of La Guaira, north of Caracas, suffered the most severe damage and casualties. Experts like Christine Goulet from the USGS earthquake science center explain that doublets, while less common than typical main shock-aftershock sequences, signal complex fault structures. Venezuela's Bocono fault, running about 300 miles along the Venezuelan Andes, is one such example. This type of event can happen anywhere globally. The doublet occurred where the Caribbean and South American tectonic plates meet, a boundary that is less active than others. The movement involved shallow strike-slip faulting, where two blocks of rock slide horizontally past each other. While not inherently more dangerous than other fault movements, the extent of damage is influenced by factors like rupture length and the specific fault mechanics. Historically, Venezuela has experienced significant seismic activity, including a previous doublet in September 2025 and a devastating 6.6 magnitude earthquake in July 1967 that killed hundreds.

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Doublet earthquakes happen when a pair of similar-sized quakes hit close in location and time.