We are hiring
Lettis Consultants International (LCI) is looking to hire one Geologist to work on consulting and applied research projects in the fields of Engineering Geology and Geologic Hazards Assessment. The opening …
Recent News & Publications
LCI to Co-Lead GSA Field Trip to the Western Transverse Ranges, California
Along with Drs. Nate Onderdonk (Cal State Long Beach) and Antonio Garcia (Cal Poly San Luis Obispo), LCI’s Ian McGregor will co-lead a Geological Society of America (GSA) field trip …
Ivan Wong named an EERI Honorary Member
Senior Principal Seismologist Ivan Wong has been named a 2024 Earthquake Engineering Research Institute (EERI) Honorary Member in recognition of his significant contributions to earthquake engineering and seismology. This award recognizes his …
Implications of input ground-motion selection techniques on site response analyses for different tectonic settings
Senior Staff Geotechnical Engineer Ishika Chowdhury published a paper in Earthquake Spectra with Prof. Ashly Cabas titled “Implications of input ground-motion selection techniques on site response analyses for different tectonic …
An equivalent point-source stochastic model of the NGA-East ground-motion models
Principal Engineer Arash Zandieh published a paper in Earthquake Spectra with Prof. Shahram Pezeshk titled “An equivalent point-source stochastic model of the NGA-East ground-motion models.” They estimated seismological parameters in …
Hazard implications of synchronous fault rupture: Case study of the Wasatch and West Valley faults, Utah
Senior Principal Seismologist Ivan Wong published a paper in Earthquake Spectra with Patricia Thomas titled “Hazard implications of synchronous fault rupture: Case study of the Wasatch and West Valley faults, …
Earthquake scenario development in conjunction with the 2023 USGS National Seismic Hazard Model
Project Engineer Robert Chase is the first author of a recently published paper in Earthquake Spectra, titled Earthquake scenario development in conjunction with the 2023 USGS National Seismic Hazard Model. …
Earthquake Scenarios for Quito, Ecuador; Cali, Colombia; and Santiago De Los Caballeros, Dominican Republic
Earthquake Scenarios for Quito, Ecuador; Cali, Colombia; and Santiago De Los Caballeros, Dominican Republic (https://doi.org/10.1785/0220220249) Project Engineer Robert Chase is the first author of a recently published paper in Seismological …
Geotechnical Field Reconnaissance: Mw 7.8 and Mw 7.5 Kahramanmaraş, Turkey Earthquake Sequence
On Feb. 6, 2023, a devastating earthquake sequence occurred within the East Anatolian fault system. A Mw 7.8 earthquake struck at 4:17 a.m. local time approximately 35 km northwest of …
Geotechnical Field Reconnaissance: Mw 6.5 and Mw 6.9 Taitung, Taiwan Earthquakes
The September 17th Mw 6.5 and September 18th Mw 6.9 Taiwan earthquakes occurred within the Longitudinal Valley near the town of Chihshang in southeast Taiwan. These events ruptured components of …