Key highlights
- Seismic activity at Garpenberg mine spiked to abnormal levels, prompting evacuation on March 14, 2026.
- Underground production was halted immediately and concentrator operations continued until March 15, then stopped for planning reasons.
- Initial inspections of the mine and infrastructure began on March 18, 2026.
- Resumption timing, ramp-up rate and financial impact remain undetermined pending completion of inspections.
Incident
On Saturday evening, March 14, 2026, seismic activity at the Garpenberg mine rose to abnormal levels, prompting evacuation and an immediate halt to underground production.
Concentrator operations
Concentrator production continued through Sunday, March 15, but was then stopped for planning reasons.
Inspections, restart and impact
Seismic activity has since decreased and initial inspections of mine infrastructure and mining positions began on March 18; production will be resumed gradually after inspections are completed, but timing, ramp-up rate and overall impact on Boliden's results remain undetermined until inspections conclude and a restart plan is defined.
