Five earthquakes rocked central Oklahoma early today, according to the U.S. Geological Survey. The most powerful tremor struck at about 2:00, central time this morning, northeast of Luther. That's a little less than 30 miles northeast of Oklahoma City. The quake's magnitude was 4.2. Other tremors had magnitudes between 2.8 and 4.2.
News of the deadly bombing attack on the Boston Marathon is echoing in Oklahoma City, where residents will observe the 18th anniversary Friday of the bombing of the Alfred P. Murrah Federal Building, which killed 168 people. The events include a marathon, which remains on the schedule, although officials say they will review their security plans.
Oklahoma's health department is contacting some 7,000 patients of Tulsa-area dentist Dr. W. Scott Harrington to warn them they may have been exposed to "blood-borne viruses."
Officials are urging former patients to get screened for hepatitis B, hepatitis C and HIV after an investigation of Harrington's office found rusty instruments in use and evidence of unsanitary practices. The dentist had clinics in Tulsa and Owasso.