LILBOURN, Mo. -- It happened again in the Missouri bootheel.
Seismologists confirm a fourth earthquake in southeast Missouri in the last week. The 2.4 magnitude earthquake was centered in the Lilbourn area. It hit about 9:35 a.m. Monday.
Last week, a 3.6 earthquake rocked the Caruthersville area. Two smaller earthquakes struck the Malden and Ironton areas.
The New Madrid fault zone is considered the most active east of the Rockies.