JACKSON HOLE, WYO \u2013 Some residents in the Snake River Canyon and south of town in the Hoback Nation were jolted away this morning by a 3.4M earthquake centered in the Greys River drainage.\r\n\r\nUSGS Earthquake website registered the tremor at 6:31am. It was centered just south of Elk Mountain, about a mile east of the confluence of the Greys and Little Greys rivers.\r\n\r\nThe area has experienced fairly lively seismic activity in the past. A few shook that area in August of 1985. Most recently, a 3.5M earthquake was registered very near the epicenter of this morning\u2019s on July 19, 2011.\r\n\r\nSome 37 people responded online to say they felt the quake. It was felt with more perceived intensity in Alpine, Hoback Junction, and the South Park area.