she tries to figure out what happened. what s your emergency? no emergency, operator i just wanted to let you know that my house shook like the dickens. yes, ma am, the whole police department did too. we had an earthquake. is that what it was? okay. are you okay? yes, i was on the computer my i mean, everything in my office just shook like the dickens. i thought i was going to according to the u.s. geological survey north texas has been hit with more than 20 earthquakes since last january. more than 100 since 2008. seismologists are working to figure out what s behind the uptick. and some wonder if this is the result of fraccing that took place in 2010. researchers are taking a look at disposed waste water in the area. there have been some indications in the past that the disposable fluids can trigger small earthquakes.