Overview
- Scientists reporting in Science identified two complex barrier zones inside the Gofar transform fault that act like built‑in brakes on magnitude‑6 ruptures.
- Ocean‑bottom seismometers in 2008 and again in 2019–2022 captured tens of thousands of tiny quakes that showed the same spots flared before big events and then went quiet.
- The barriers are places where the fault splits into several strands with 100 to 400 meter offsets, seawater seeps into the cracked rock, and a rapid drop in water pressure briefly locks the fault.
- The team says similar structures may be common on oceanic transform faults worldwide, which could cap quake size and refine coastal hazard forecasts.
- Gofar sits about 1,000 miles west of Ecuador along the East Pacific Rise, so it poses little direct risk to people, yet it offers a clear window into how fluids can halt a growing rupture.