Earthquake cycle stress accumulation at Cajon Pass: 1000-year paleoseismic record reveals 2.8 MPa loading on southern San Andreas fault system
By
Liliane M. L. Burkhard
Summary
This article presents a scientific study on earthquake cycle stress accumulation along the southern San Andreas and San Jacinto fault systems, focusing on Cajon Pass as a critical junction point. Using 4D earthquake cycle simulations based on a 1000-year paleoseismic rupture history, the researchers assess spatial and temporal variations in Coulomb stress evolution. The study finds that with over a century since the last major rupture affecting the Los Angeles region, tectonic stress has steadily built up, and by 2025, Coulomb stress at Cajon Pass reaches 2.8 MPa, raising concerns about potential through-going ruptures and an imminent large earthquake in Southern California.
Source
bskyEarthquake cycle stress accumulation at Cajon Pass: 1000-year paleoseismic record reveals 2.8 MPa loading on southern San Andreas fault systemagupubs.onlinelibrary.wiley.comKey quotes
· 4 pulledWith over a century since the last major rupture affecting the wider Los Angeles region, tectonic stress has steadily built along the southern San Andreas and San Jacinto fault systems, raising concerns of an imminent large earthquake.
Cajon Pass, located at the junction of these faults, represents a critical site for potential through-going ruptures in Southern California.
We constructed new 4D earthquake cycle simulations using a 1000-year paleoseismic rupture history of the San Andreas Fault System (SAFS) to assess spatial and temporal variations in Coulomb stress evolution.
Coulomb stress in 2025 at Cajon Pass reaches 2.8 MPa on M...
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