Geologists analyze unusual behavior of New Jersey earthquake felt by millions

A magnitude 4.8 earthquake struck Tewksbury, New Jersey, on April 5, 2024, surprising researchers with its unusual impact. It was felt by 42 million people, reaching as far as Virginia and Maine, but caused minimal damage, unlike previous quakes in the region. Geologists found that the quake's energy was focused downward, allowing seismic waves to bounce back up, intensifying shaking in areas like New York City. This behavior differs from typical quakes, which usually cause stronger effects near the epicenter. The study highlights the need to reassess seismic risks in the New York tristate area. Future quakes, even if smaller, could potentially impact densely populated regions more severely than previously understood.