Source: USGS Earthquake Catalog (ComCat/ANSS) · M5.0+, continental US, 1900-2024, real public data (913 events: 775 natural earthquakes, 137 underground nuclear test detonations recorded seismically at the Nevada Test Site, 1 mine collapse) ·
Catalog completeness improves substantially after ~1960s seismograph network expansion — earlier decades likely undercount moderate quakes relative to recent decades.