Quote Originally Posted by Yatta View Post
Volcanic tremors are a type of volcanic earthquake.
Well, press release could have just quoted exactly what the Phivolcs bulletin said.

Besides, in its own bulletins, Phivolcs have reported on both volcanic earthquakes and volcanic tremors. So if it omitted earthquakes in this bulletin, then this only means it wants to tell the general public that it was just tremors, and not earthquakes.