A 7.5 magnitude earthquake struck in the northern Pacific on Wednesday and forecasters said tsunami waves were possible for the nearest shores. A brief tsunami watch for Hawaii was cancelled. The quake struck 136 miles south-southeast of Severo on Russia’s far eastern Kuril Islands, the US Geological Survey said. It was 37 miles deep. The Pacific Tsunami Warning Centre initially warned hazardous waves were possible in parts of the Kurils, but later said based on further analysis that waves of less than 30 centimeters above tide level were possible in the northern Pacific. It noted that the wave height and potential hazard may vary by geography and other local features. A tsunami watch issued for Hawaii was halted shortly afterwards. The Japan Meteorological Agency said the quake was a stronger 7.8 magnitude and may cause a slight change of sea levels around Japanese coasts.