Visayas aftershocks will not go on for years - Phivolcs
MANILA - The aftershocks from the 7.2 magnitude Visayas earthquake will last for months, not years, the Philippine Institute of Volcanology and Seismology (Phivolcs) said.
The Visayas earthquake is not similar to Japan, which experienced a 7.1 magnitude earthquake last Saturday.
Seismologists said this was part of the aftershocks of the March 2011 magnitude 9 earthquake.
Phivolcs director Renato Solidum explained the Bohol earthquake's energy was a thousand times weaker than what was gemerated by the Japan quake.
While the aftershocks might continue for months, Solidum said affected residents can already go back to their homes if they are structurally safe.
He said Phivolcs has recorded 2,950 aftershocks, all weaker than the earthquake last October 15. Most of these aftershocks are not even felt by the people.
Meanwhile, Solidum again alerted residents of Metro Manila about an imminent earthquake.
Based on studies, the West Valley Fault traversing Manila is likely to move again based on a 400- to 600-year interval between quakes.
The last major movement of the West Valley Fault happened in 1658, or 355 years ago. He said Filipinos might experience a major quake here in Metro Manila so there is a need to get ready.
Based on an earlier simulation, a 7.2 magnitude quake in Metro Manila will destroy 2% to 13% of medium- and high-rise residential or commercial buildings, which may kill more than 32,000 residents.
The estimated cost of damage can go as high as P2.3 trillion.
In a 6.5 magnitude quake, the simulation shows P1.9 trillion damage and 27,000 deaths.
Solidum said, however, that the simulation has not factored in preparations done by the public and private sectors.