Earthquake swarm, Northland tsunami advisory: 7.4m shake near Kermadec Islands after 7.3m jolt off North Island east coast

QUAKE LATEST* Swarm of earthquakes off NZ coast spark Civil Defence warnings* 7.4 magnitude shake strikes at 6.41am off Raoul Island, the largest of the Kermadec Islands* Tsunami activity advisory for east coast of Northland -…