What is the fine-grained topic of the following text: JAKARTA, Dec. 29 (Xinhua) -- A powerful quake in the Philippines was strongly felt in North Sulawesi province in Indonesia's northern Celebes Island on Saturday, but the Indonesian meteorology and geophysics agency did not issue a tsunami warning, an official of the agency said. Only return the topic.
Powerful earthquake in the Philippines felt in Indonesia's North Sulawesi province