https://www.mercurynews.com/2019/12/12/did-you-feel-that-usgs-releases-new-earthquake-map/

The U.S. Geological Survey released new earthquake hazard maps for the nation on Thursday, boosting the risk of seismic damage in the South and East Bay — especially for tall buildings.

A more thorough analysis of the soils under the San Jose and Walnut Creek areas prompted the USGS to increase shaking estimates by 10 to 25 percent since the USGS’s last update five years ago.