Jonathan C Matti, PhD
Jonathan is an Emeritus at the Tucson office of the Geology, Minerals, Energy, and Geophysics Science
Center. He received a PhD degree in geology from Stanford University in 1978. Since joining the USGS in
1977, he has performed a variety of applied- and basic-research investigations. Among these,
his research into the long-term history of the San Andreas Fault in southern California stands out.
Biography
Recent Accomplishments
Education
- B.S., Geology, University of California, Riverside, 1969
- M.S., Geology, University of California, Riverside, 1971
- Ph.D., Geology, Stanford University, 1978
Non-USGS Partners
- San Bernardino National Forest
- San Gorgonio Pass Water Agency
- San Bernardino Valley Municipal Water Agency
- U.S. Bureau of Land Management
- Joshua Tree National Park,
- San Bernardino County Geologist
- Riverside County Geologist
- Southern California Earthquake Center (SCEC),
Professional Studies/Experience
Mentorship/Outreach
Professional societies/affiliations/committees/editorial boards
Honors, awards, recognition, elected offices
Scientific/Oral Presentations, Abstracts
Science and Products
San Andreas Fault System in Southern California
Southern California is home to nearly 24 million people and countless visitors who live, recreate, consume resources, and face the risk of natural hazards in the region. This project produces high-quality, multi-purpose geologic maps, databases, and reports that portray our understanding of the region’s four-dimensional geologic framework. We conduct stratigraphic, structural, geomorphological...
Evaluation of the Source and Transport of High Nitrate Concentrations in Ground Water, Warren Subbasin, California
Ground water historically has been the sole source of water supply for the Town of Yucca Valley in the Warren subbasin of the Morongo ground-water basin, California. An imbalance between ground-water recharge and pumpage caused ground-water levels in the subbasin to decline by as much as 300 feet from the late 1940s through 1994. In response, the...
Nishikawa, Tracy; Densmore, Jill N.; Martin, Peter; Matti, Jonathan
Late Quaternary slip history of the Mill Creek strand of the San Andreas fault in San Gorgonio Pass, southern California: The role of a subsidiary left-lateral fault in strand switching
The fault history of the Mill Creek strand of the San Andreas fault (SAF) in the San Gorgonio Pass region, along with the reconstructed geomorphology surrounding this fault strand, reveals the important role of the left-lateral Pinto Mountain fault in the regional fault strand switching. The Mill Creek strand has 7.1–8.7 km total slip....
Kendrick, Katherine J.; Matti, Jonathan; Mahan, Shannon A. Basin thickness variations at the Junction of the Eastern California Shear Zone and the San Bernardino Mountains, California: How thick could the Pliocene sections be?
We estimate the thickness of Neogene basin fill along the junction of the Eastern California Shear Zone and the North Frontal thrust system of the San Bernardino Mountains using gravity data with geologic and well log constraints. The geometry of the basin fill is of interest for groundwater assessment and location of potential faults, as well as...
Langenheim, Victoria; Surko, Tammy L.; Armstrong, Phillip A.; Matti, Jonathan