At 06:53:08 PM (Philippine Time), the quake struck the epicenter which is 127 km (78 miles) East of Butuan.
The red dot on the graph locates the epicenter of the 10PM Surigao Earthquake on April 21, 2011| Courtesy of Phivolcs
On the bulletin of the Philippine Institute of Volcanology and Seismology (Phivolcs), a 3.8 magnitude temblor was reported which hit 130 km SE of Tandag, Surigao del Sur at 6:53 PM.
Another tremor was felt at 10:20 PM which measures at magnitude 4.0, said Phivolcs. Its epicenter is 123 km SE of Tandag, Surigao del Sur. It has a depth of 33 k.m. and is of tectonic origin.
The Institute does not expect aftershocks nor tsunami from the quake.
There were no immediate reports of damage from the quakes.