A LARGE magnitude M6.6 earthquake happened overnight at 06:33hrs UTC. The epicenter was offshore, but had a shallow depth of 10km and was felt on land. Small chance of liquefaction from the shaking. The event was so strong, it was detected here in Spring, TX by #irisstation #E1TX and #raspberryshake station #R5DDF. THe image below was recorded on an EQ1 seismometer.