NYC's Earthquake Risk: The Ramapo Fault, 40 Miles Away

New York City sits on the Atlantic Passive Margin, a zone of low-to-moderate seismicity. No major fault runs directly beneath the five boroughs. The closest significant structure is the Ramapo Fault, a ~185-mile fracture system stretching from eastern Pennsylvania through northern New Jersey into southern New York—~40 miles northwest of Manhattan.

While the Ramapo Fault has produced minor quakes (M<3.0), the region's largest historical event was the 1884 Brooklyn earthquake (M~5.0), likely on a buried fault near the coast. NYC building codes now incorporate seismic provisions; the 2011 Virginia quake (M5.8) was felt strongly in high-rises due to amplification on soft soils.

Risk is real but low; preparedness (anchoring furniture, emergency kits) is prudent.