AlHijjah 22, 1432, Nov 18, 2011, SPA -- A magnitude 4.6 earthquake shook an isolated area in the state of Washington near the Canadian border, officials said on Friday. The Pacific Northwest Seismic Network said the earthquake occurred early Friday and was centered about 11.3 kilometers northwest Omak city, and about 12.9 kilometers northwest of Okanogan city. A dispatcher in the Okanogan County sheriff's office said there are no reports of injuries or damage.