The Philippine Institute of Volcanology and Seismology earlier raised a Tsunami Alert Level 1 following the 8.8 magnitude earthquake that hit south-central Chile Saturday morning (afternoon in Manila). Phivolcs head Renato Solidum said if ever the tsunami triggered off Chile happens, it is expected to arrive between 1:30pm and 2 pm Sunday. (See update here)

Earthquake-generated tsunami  (source)

An earthquake may generate a tsunami if the quake:

• occurs just below a body of water,
• is of moderate or high magnitude, and
• displaces a large-enough volume of water.

Most tsunamis are generated by underwater earthquakes