Cumbre Vieja volcano erupts on Spain’s Canary Islands
An earthquake swarm under La Cumbre Vieja began a week ago and thousands of tremors have followed, likely causing the eruption
The earthquake swarm doesn’t cause the eruption. Nor do the tremors. They’re both symptoms of the same thing, the magma chamber filling up/moving/getting ready to blow. Maybe. You can have the swarm without the eruption, can -= rarely – have the eruption without the swarm. But they’re both caused by the same thing, one does not cause the other.