Every so often, a headline comes across our desk that stops us mid-scroll. This one did it: California fault stress hits highest level in 1,000 years.
According to new research from earth scientists at the University of Hawaiʻi at Mānoa, tectonic stress along the San Andreas and San Jacinto fault systems in Southern California has climbed to the highest level seen in the past millennium. The researchers describe the system as being in a “critically loaded state,” with several fault segments now at — or above — their peak stress levels of the last 1,000 years.
Two details from the study stand out to us.
First, the “earthquake gate.” Researchers found that Cajon Pass — the junction between the two fault systems northeast of Los Angeles — may sometimes block a rupture from crossing between the faults, and sometimes allow it to pass through both in a single event. A joint rupture involving both systems could be far more damaging than a large quake on one fault alone, and it would affect densely populated areas including Los Angeles, San Bernardino, Riverside, and the Coachella Valley.
Second, the lead author’s plain-language takeaway. Liliane Burkhard told Newsweek this is not a distant, theoretical risk — stress has been building continuously since 1857, and the question is not really if but when.
We’re not seismologists, and we’re not in the business of predicting earthquakes. But we are in the business of helping Californians think clearly about risk, and this study is a good excuse to have a conversation most property owners keep putting off.
The uncomfortable truth about earthquake coverage
Here’s the part that surprises people every time: your standard home, condo, renters, or commercial property policy almost certainly does not cover earthquake damage. Earthquake coverage is a separate policy or endorsement you have to actively choose to buy — and in a state where the ground is, quite literally, more loaded than it’s been in a thousand years, that’s a choice worth making deliberately rather than by default.
If you own a home in California, start with our guide to residential earthquake insurance and what Californians need to know. It walks through what these policies cover, the options available (including the California Earthquake Authority), and the practical steps you can take to make your home safer before the shaking starts.
If you own apartment buildings or commercial property, the math is different — and the stakes are often bigger. A building that pencils beautifully today can become a total financial loss overnight if it’s carrying a mortgage and no earthquake coverage. We broke down the decision framework in Does commercial earthquake insurance make sense for building owners in Los Angeles?
And for everyone, it’s worth knowing what recovery actually looks like after a major quake — because insurance is only one piece of it. Our post on 3 tips for recovering from an earthquake’s aftermath covers the steps that matter in the days and weeks after an event.
Our take
Studies like this one aren’t a reason to panic. They’re a reason to plan. The researchers themselves put it best: know your evacuation routes, have a communication plan, keep an emergency kit ready — and, we’d add, know exactly what your policies will and won’t do for you before you need them.
If you’re not sure where your coverage stands, that’s a five-minute conversation. Reach out to us and we’ll walk through it together — no pressure, no jargon, just a straight answer about whether earthquake coverage makes sense for what you own.
