# San Andreas Fault seismic risk research > Live situation record from CLSTR: https://clstr.news/situations/san-andreas-fault-seismic-risk-research > Updated: 2026-08-26T08:23:10.000Z. Sources: 17. Developments: 3. Scientific research has highlighted increasing seismic risks along the San Andreas Fault. One study indicates that tectonic tension accumulation has reached its highest level in 1,000 years, raising concerns about a potential megathrust earthquake known as ‘The Big One’. This risk affects approximately 13 million residents in California and extends into Mexican municipalities such as Mexicali, Tijuana, and Ensenada. Geophysicists have identified the Cajon Pass as a critical ‘seismic gateway’ that could facilitate a connection between the San Andreas and San Jacinto faults. Liliane Burkhard of the University of Bern identified this area as a critical ‘earthquake gate’ that could either block a rupture or allow it to connect both fault systems, potentially resulting in a single event with a magnitude of approximately 7.5. Recent findings from San Jose State University confirm that the San Andreas Fault is sliding faster than previously estimated. While the United States Geological Survey (USGS) notes that higher slip rates can be associated with more frequent earthquakes, experts clarify that this does not imply an immediate or sudden increase in tension, but rather provides better tools for analyzing movement. Scientists have also addressed a recent global increase in seismic activity across various countries, noting that there is no such thing as an ‘earthquake season.’ Instead, these events are driven by the continuous movement of tectonic plates where friction is overcome by tectonic forces. ## Claims - Tectonic strain along the San Andreas and San Jacinto faults has reached its highest level in 1,000 years. (corroborated by 2 sources) - The Cajon Pass intersection can act as a gate that either blocks or facilitates a rupture connecting the San Andreas and San Jacinto faults in a magnitude 7.5 event. (corroborated by 2 sources) - The Earth averages approximately 16 earthquakes of magnitude 7 or greater annually. (corroborated by 2 sources) - Dynamic activation allows seismic waves from distant earthquakes to trigger movements on remote, highly pressurized faults. (corroborated by 2 sources) - The northern segment of the San Andreas Fault in the Santa Cruz Mountains moves faster than previously estimated. (single source) ## Timeline ### 2026-08-26: San Andreas Fault sliding faster than previously thought, study finds Research shows the San Andreas Fault is sliding faster than expected, while scientists clarify that recent global seismic activity is due to tectonic plate dynamics rather than a specific ‘earthquake season.’ 7 sources. https://clstr.news/cluster/san-andreas-fault-sliding-faster-than-previously-thought-study-finds ### 2026-08-20: San Andreas Fault slip rate found to be faster than estimated Research by San Jose State University indicates the northern San Andreas Fault's slip rate in the Santa Cruz Mountains is faster than previously thought, potentially increasing earthquake frequency. 2 sources. https://clstr.news/cluster/san-andreas-fault-slip-rate-found-to-be-faster-than-estimated ### 2026-08-19: San Andreas Fault reaches highest tectonic strain in 1,000 years Research shows the San Andreas Fault has reached its highest tectonic strain in 1,000 years, increasing the risk of a major 'Big One' earthquake in California. 8 sources. https://clstr.news/cluster/san-andreas-fault-tension-reaches-1000-year-high --- Cite as: San Andreas Fault seismic risk research. CLSTR, https://clstr.news/situations/san-andreas-fault-seismic-risk-research