- Will California experience a 7.0 or above magnitude earthquake in 2026?5¢5%
Trader consensus at 95.1% for no California earthquake of magnitude 7.0 or higher in 2026 stems primarily from the absence of any such event through mid-October, with USGS data showing only background seismicity dominated by magnitudes below 4.0 across the state. California’s major faults, including the San Andreas system, exhibit recurrence intervals of decades to centuries for M7+ ruptures, and current monitoring reveals no accelerated strain accumulation or foreshock sequences that would elevate near-term risk. Historical patterns indicate roughly one to two such quakes per decade on average, making a late-year occurrence statistically unlikely absent unusual precursors. While model uncertainty persists and an unexpected rupture remains possible before December 31, ongoing USGS seismic networks show no indicators of imminent escalation.
Rules
This market will resolve "Yes" if the United States Geological Survey (USGS) (https://www.usgs.gov/programs/earthquake-hazards/lists-maps-and-statistics) reports at least one earthquake of moment magnitude (Mw) 7.0 or greater with an epicenter located within the state of California by December 31, 2026 at 11:59:59 PM ET. Otherwise, this market will resolve "No". The state of California includes the entirety of California as recognized under U.S. law including offshore areas within California's territorial boundaries. Earthquakes occurring on the California border must have their USGS-listed epicenter coordinates fall within California's boundaries. Any individual event meeting the magnitude and location criteria resolves the market "Yes", regardless of whether it is classified as a mainshock, aftershock, or foreshock. Resolution will be based on the USGS's final reviewed magnitude, not preliminary estimates, regardless of when that review is published, but the qualifying earthquake needs to have occurred within California by December 31, 2026 at 11:59:59 PM ET. This market will resolve based on official information from USGS, however, an overwhelming consensus of credible reporting confirming a qualifying earthquake may also resolve this market in an instance where USGS becomes unavailable.