Parts of the North Pacific were rattled by powerful aftershocks on Thursday,Dozens of aftershocks have been recorded since Wednesday's quake, which prompted tsunami warnings and evacuations on both sides of the Pacific Ocean.Most were recorded off Russia's Far East.that occurred just before 5:30 p.m. local time, about 124 miles southeast of Severo-Kurilsk on the island of Paramushir.on the Kamchatka Peninsula just before 10 p.m. on Wednesday.While most official warnings in the U.S. and other nations were lifted on Wednesday, a 40-mile stretch of Northern California's coastline remained under a tsunami advisory early Thursday. It ran from the boundary of Humboldt and Del Norte Counties to the Oregon border.