A moderate earthquake with a preliminary magnitude of 5.5 has struck off Luzon island in the northern Philippines, with shaking felt as far away as Manila and Quezon City, seismologists and residents say, Bnonews reports.
The earthquake, which struck at 3:18 a.m. local time on Sunday, was centered in the sea, about 31 kilometers (20 miles) northeast of Lubang Island, or 89 km (55 mi) west of Calamba and 65 km (41 mi) southwest of Balanga.
The Philippine Institute of Volcanology and Seismology said the quake measured 5.5 and struck at a depth of 85 kilometers (53 miles), which is relatively deep. The U.S. Geological Survey (USGS) put the magnitude slightly lower, at 5.3.
There is no threat of a tsunami but aftershocks are likely.