Skip to main content
U.S. flag

An official website of the United States government

ShakeMaps for the 1868 Hayward Quake and the 1989 Loma Prieta Quake

By Communications and Publishing 2008 (approx.)
2 side-by-side maps showing amount of ground shaking in 1868 & 1989 earthquakes. Yellow is light shaking. Reds are stronger shak
Original Thumbnail Medium

Detailed Description

ShakeMap showing the inferred intensity of ground shaking in the 1868 earthquake (measured as MMI, or Modified Mercalli Intensity), compared to a ShakeMap for the 1989 magnitude 6.9 Loma Prieta earthquake. Red lines are major earthquake faults; black line shows the portion of the Hayward Fault that ruptured in 1868; diamonds show locations of damage reports (1868) and seismic recordings (1989).

Sources/Usage

Public Domain.

The Hayward Fault—Is It Due for a Repeat of the Powerful 1868 Earthquake?
USGS Fact Sheet 2018-3052