Seismic events in the mine are not unusual, but on social media several Kiruna residents describe serious shaking in the bedrock.
"Feeled in Tuolla and it hasn't happened before," writes a signature.
Another writes that it was "felt in New Kiruna" and even residents of Lombolo testify to a strong tremor.
The area was secured before operation
Mine manager Joel Kangas announces that no one was injured.
- The mine was kept closed while the area was secured and that the mine reopened at 06:30, he says in a press release.
The magnitude measured 2.2
The local magnitude reached 2.2 on LKAB.'s own scale.
- In order to get answers to exactly where the seismic events take place, a scale is needed that is adapted to the conditions.
The Richter scale is designed to measure natural earthquakes at great distances, it measures at a different frequency and is too inaccurate for the smaller tremors that occur during mining, the company writes on its website.