A strong 6.1-magnitude earthquake struck off the southern Philippine island of Mindanao early today.
The US Geological Survey said the quake had a depth of 38 kilometres and hit some 87 kilometres east of the city of Butuan.
The USGS had initially reported the quake as having a magnitude of 6.4, but revised it to 6.1.
Hours after the temblor hit the Civil Defense chief Benito Ramos said that there was no damage, no casualties, and that the earthquake was strong, but its source was deep and far.
The institute recorded several aftershocks, but Ramos said they were hardly felt in the area. He said no tsunami warnings were issued.