During the night of 20-July 2025 at 02:55 UTC an earthquake with magnitude of Mw3,5 took place in Krýsuvík volcano. This earthquake was felt in Reykjavík and other nearby area.
This is a tectonic earthquake. Possibly adjustment in the crust the eruption that is happening in Svartsengi volcano. Since the eruption results in the Svartsengi volcano to deflate. This earthquake swarm seems to be over for now.