The clock had struck four minutes past four when Pia Bjuhr was violently awakened from her sleep.

- As a Kirunabo, I immediately understood what it was all about.

I think the tremors have become more and more powerful in recent years.

Concern for the daughter

The Kiruna mine was temporarily closed after the quake, but reopened in the morning.

- My daughter works in the mine and I always think of her as soon as there is an earthquake.

Of course I'm worried that something might happen to her.

In a previous quake she was underground working but this time I knew she was off, thank God.

I think the tremors are stronger

Pia Bjuhr works as a teacher herself but has previously been employed at Kirunagruvan.

- In my time, there weren't that many big earthquakes.

We live beyond new Kiruna, further from the mine, but still an earthquake can be felt strongly.

Not because I think our houses are collapsing, LKAB surely has full control when they make their calculations, but I think of my daughter in the mine and I think of my son who goes to high school where the walls are cracking, says Pia Bjuhr.