This Project Grant from the U.S. Geological Survey, under the Earthquake Hazards Program Assistance (CFDA 15.807), provides $149,538 to Lettis Consultants International Inc. to conduct paleoseismic investigations of the Lafayette Fault and Contra Costa Shear Zone in Contra Costa County, California from July 1, 2022 to December 31, 2023. Key deliverables include seismicity analysis results, data from two trench exposures along the Lafayette Fault such as photomosaics, geological logs, maps, and results of geochronological analyses. This information will aid seismic hazard assessment and paleoseismology researchers in understanding fault connectivity and developing probabilistic seismic hazard models for the San Francisco Bay Area region by providing baseline data on the fault's Holocene activity and age of the most recent earthquake. No subrecipient activities are associated with this award.
Mod # | Description | Reason For Modification | Federal Obligation (Click to sort descending) | Date (Click to sort ascending) |
|---|---|---|---|---|
| Not listed | $0 | 12/8/22 | ||
| Not listed | $74.8k | 6/24/22 |