Mining group Boliden is set to write down assets by 700 million SEK following damage caused by unusual seismic activity at the Garpenberg mine in March, according to a press release.

The impairment charge will negatively impact operating profit in the first quarter of 2026 and is linked to damage in the upper section of the Lappberget ore body, as well as other infrastructure including ventilation, compressed air systems, water management, and certain mobile equipment.

Boliden has also previously flagged a production impact, which is expected to have a negative effect on EBITDA of approximately 400 million SEK during the quarter.