A STRONG earthquake occurred in the western Pacific on the morning of May 14. Its records were confused with those of another earthquake in the West Indian region, but the position of its epicentre has now been determined with the arrival of additional records from seismological stations surrounding and in the Pacific. It lies in about lat. 4° N., long. 130° E., as determined by the seismologists of the U.S. Coast and Geodetic Survey (Wire Report of Science Service, Washington, May 16). This point lies at sea, southeast of the island of Mindanao in the Philippines. The earthquake was clearly a severe one, as it is reported to have been felt distinctly to a distance of about 600 miles from the epicentre.