ShakeMaps for the 1868 Hayward Quake and the 1989 Loma Prieta Quake
![2 side-by-side maps showing amount of ground shaking in 1868 & 1989 earthquakes. Yellow is light shaking. Reds are stronger shak](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Loma1868shakemaps.jpg?itok=QRpMMp2M)
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