Oklahoma Earthquake Swarm Continues
October 23, 2013 | USGS
"Since January 2009, more than 200 magnitude 3.0 or greater earthquakes have rattled Central Oklahoma, marking a significant rise in the frequency of these seismic events. [...] The analysis suggests that a contributing factor to the increase in earthquakes triggers may be from activities such as wastewater disposal." Quoted from the USGS press release.
Magnitude 6.6 Earthquake in China
April 21, 2013 | Reuters.com
A magnitude 6.6 earthquake in China killed over 150 people and injured more than 5,000 on Saturday morning. USGS reports that the earthquake is likely to have occurred on the Longmenshan Fault or a tectonically related fault.
Quarry Blast Frightens Chicago?
November 5, 2013 | Chicago Tribune
At shortly after noon today, people throughout the Chicago area were frightened because they thought that an earthquake was occurring. A USGS scientist reported that it appeared to be an unusually strong quarry blast south of Chicago. A portion of the USGS "Did you feel it?" map is shown below with more USGS data here. People as far away as Wisconsin and Indiana claimed that they felt the shaking.