TOKYO — A series of earthquakes has rattled Tokyo and northeast Japan but caused no apparent damage or injury in the same region hit by last year’s devastating tsunami.

The strongest tremor, off Hokkaido island, was 6.8 magnitude and caused tidal changes that prompted some communities to issue evacuation orders or tsunami advisories to residents nearest the coast.

A swelling of 8 inches was observed in the port of Hachinohe in Aomori, northern Japan, about one hour later. Smaller changes were reported in several locations on Hokkaido island and Aomori prefecture.

The Japan Meteorological Agency lifted all tsunami advisories about an hour and half later.

The earthquake felt in Tokyo was magnitude 6.1.

The town of Otsuchi in Iwate prefecture, where more than 800 died in last year’s tsunami, issued an evacuation order to coastal households as a precaution after the 6.8 quake. No damage or injury was reported, he said.

Iwate was heavily damaged by last year’s earthquake and tsunami.