USA “ M 4.0 “ Powerful aftershock near Grand Teton National Park and Jackson

Earthquake Report comment :
For the second day in a row,  a serious quake happened in the Grand Teton National Forest, only 20 miles from Jackson and from the National Park.
The aftershock was felt as a light to moderate shaking by people living within a radius of 30 miles from the epicenter.
Although people are mentioning shaking up to IV Mercalli (light shaking), USGS calculated numbers are mentioning  I to II Mercalli (none to weak shaking).  Light to moderate shaking would be strongest near the epicenter in the wilderness area.

Most important Earthquake Data:
Thursday, August 05, 2010 at 08:59:28 AM at epicenter
Depth (Hypocenter) : 5 km
Geo-location(s) :
30 km (20 miles) ENE of Jackson, Wyoming
65 km (40 miles) W of Dubois, Wyoming

Links to important maps

USGS Did You Feel It Map
Google satellite map of the area showing the kind of terrain the earthquake took place
USGS Shaking map
USGS Pager Map (impact on the population)

Read also our report from the M 4.8 earthquake from August 4, 2010