It's 19% for a magnitude 4 or higher, 2% for a magnitude 5 and above, and less than 1% for a magnitude 6 or 7 earthquake. The Malibu area quake struck around 7:28 a.m. at a depth of nearly six miles.

Graph not displaying correctly ... The USGS says Thursday's earthquake was "primarily strike-slip," which is less likely to cause a tsunami because the earth's tectonic plates moved more ...