Mosaic says Esterhazy tremor will not disrupt potash output

A magnitude 3.4 tremor struck near Mosaic’s Esterhazy potash complex in Saskatchewan on November 3, but the company says production is not expected to be affected.

The event occurred at about 7:04 a.m. Central Time in mined-out K3 workings, according to the report. Mosaic said all employees were accounted for, safety inspections were completed, and no structural damage was reported. Argus Media reported the same position.

Esterhazy has nameplate capacity of 7.8 million metric tons a year across its K1, K2 and K3 mines. Its life-of-mine planning figure is about 6.1 million metric tons per year, according to Mosaic’s 2025 annual report filed with the U.S. Securities and Exchange Commission. Mosaic’s company-wide 2026 potash guidance of about 9 million metric tons was reaffirmed with second-quarter results.

The site is under scrutiny after a fall of ground in the K3 underground mine killed a worker on December 15, 2025. No public record links that fatality to the tremor. Earthquakes Canada has labeled the event as suspected mining-induced, which the report says is not a final engineering finding.

For the longer-term potash outlook, see our earlier coverage of U.S. potash prices and the Belarus and BHP Jansen supply picture.

Source: Discovery Alert