LATER accounts of this earthquake show that, though stronger than the Santa Barbara earthquake of 1925, it is not to be numbered among the great earthquakes of California. The epicentre is placed by the U.S. Coast and Geodetic Survey in lat. 33-7° N., long. 118-9°W., a point in the San Pedro channel, about twenty-five miles west of San Pedro Point (Science Service, Washington, D.C., March 11). The earthquake was thus probably due to a movement along the submarine San Pedro fault zone. The earthquake of July 28, 1769, also seems to have been felt most severely along the shore of San Pedro Bay and may therefore have been connected with the same fault zone.