Two earthquakes rocked the Philippines' northernmost province of Batanes on Tuesday morning, state seismologists said.
No earthquake-related damages have so far been reported, according to the Philippine Institute of Volcanology and Seismology (Phivolcs).
The first quake was recorded at a magnitude of 5.1 at 9:31 a.m. local time (0131 GMT), Phivolcs said.
The quake's epicenter was traced 63 kilometers southeast of Basco, Batanes with a depth of 27 kilometers from the earth's surface.
A second and slightly milder quake, was felt more than 20 minutes later at 9:57 a.m. local time (0157 GMT).
The epicenter of the 4.6-magnitude earthquake was traced 50 kilometers southeast of Basco, Batanes.
The Phivolcs said it does not expect the twin quakes, both tectonic in origin, to wreak damage in the affected towns or produce any more aftershocks.
Meanwhile, the Hong Kong Observatory recorded the first disturbance at a slightly higher magnitude.
In a bulletin, Hong Kong seismologists said a moderate earthquake measuring 5.2 on the Richter scale jolted islands near the northern Philippine at 0133 GMT Tuesday.