At least 18 have been killed and more than 360 people have been injured after a magnitude 6.6 earthquake struck northern Japan early Thursday.

The quake, which struck at 3:08 a.m. local time in southern Hokkaido, 39 miles from Sapporo, triggered landslides and power outages. Rescuers decended upon the area to aid surviors and search for the 30  people reported missing, most of them from the town of Atsuma, which experienced landslides on about 4,600 mountainsides. 

(MORE: Japan Quake Death Toll Climbs to 18)

Public broadcaster NHK reported that all flights at New Chitose Airport in Hokkaido have been canceled, and public transport has shut down as many roadways have buckled due to the temblor.

By Friday, power had been restored to nearly half the island after it was knocked out to most of Hokkaido, which is home to more than 5 million people. A nuclear power plant on the island resorted to a backup generator to prevent a meltdown similar to Fukushima Daichi in 2011.

Officials say they hope to have power restored to most by the end of the weekend but that some areas may take up to a week to get electricity back. NHK reported that more than 38,000 people are still without running water.

"The electric supply was stopped to Tomari nuclear plant, but it can operate without external electric supply for one week," Chief Cabinet Secretary Yoshihide Suga said, according to CNN.

Prime Minister Shinzo Abe sent 25,000 troops from the nation's military to aid with rescue and recovery. 

The earthquake is just the latest of disasters brought to Japan this summer. Earlier this week, Typhoon Jebi struck southern Japan, killing at least 11. The nation has seen several months of deadly floods, typhoons, landslides and heatwaves.

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