California fault experts warn Hayward Fault could unleash major quake

Key Points:

• A 3.8-magnitude earthquake struck near the Oakland Zoo on California's Hayward Fault at 8:30 a.m. Thursday, followed by two aftershocks measuring 3.0 and 2.8.
• The Hayward Fault, a 74-mile fault line running through heavily populated Bay Area communities, is considered highly dangerous and overdue for a major earthquake, with the last significant rupture occurring in 1868.
• Scientists estimate a 14.3% chance of a magnitude 6.7 or greater earthquake on the Hayward Fault by 2034, with a 33% chance before 2043, warning it is a "tectonic time bomb."
• Research simulations show that a major magnitude 7 quake could cause shaking up to 50% stronger than previously forecasted, particularly affecting cities like Oakland, Berkeley, and Hayward.
• A major Hayward Fault earthquake could result in up to 800 deaths, 18,000 injuries, widespread fires, destruction of tens of thousands of homes, and displacement of nearly half a million people, though no major damage or injuries were reported from Thursday’s event.