Figure 7. Peak ground acceleration, or PGA, in units of g, for B-C boundary site class (Vs30=760 meters per second) for 10% probability of exceedance in 50 years (or a return period of 475 years), derived from the fault-based source model with time-dependent methodology. Credit: Erdik et al., 2025, CC BY-NC-ND 4.0
Latest posts by Alka Tripathy-Lang, Ph.D. (see all)
- Living through the Loma Prieta earthquake - October 21, 2021
- The Great Quake Debate: an interview with seismologist and author Susan Hough - August 27, 2020
- Salton Sea Swarm quiets down - August 12, 2020

