(Reuters) - A magnitude 7.2 earthquake struck in the sea 124 km (75 miles) north-northeast of the holiday island of Lombok, Indonesia, on Sunday at a very shallow depth of 1 km, the United States Geological Survey said.

There was no immediate tsunami alert from the Pacific Tsunami Warning Center.

Earlier on Sunday a tremor of 6.3 magnitude struck the island, where an earthquake earlier this month killed more than 430 people.