A magnitude 4.4
aftershock hit Surigao del Sur on Sunday afternoon, the Philippine Institute of Volcanology and Seismology (Phivolcs) reported.
The
aftershocks were felt at Intensity 4, which is classified as moderately strong.
The first quake killed five people while three people were killed in
aftershocks, Ricardo Jalad, executive director of the disaster agency, told Reuters.
Twelve more earthquakes and 102
aftershocks were recorded in the aftermath of the 5.6 in earthquake, the strongest of which was 4.9 monitored at around 8:50 a.m.
"A magnitude seven usually has
aftershocks for years," she warned.
Lucy Jones said the area will be hit by many more
aftershocks in the coming days, and might even be struck by a larger quake.
"According to BMKG monitoring, until 21:00 Western Indonesia Time (WIB), some 20
aftershocks have occurred in various magnitudes," Xinhua quoted the Chairperson of Indonesia's Meteorology, Climatology and Geophysics Agency (BMKG) as saying.
They then applied a neural net to analyse the relationships between the static stress changes that were caused by the mainshocks and the
aftershocks. The algorithm was then able to identify patterns.
The CWB initially reported that the
aftershocks from Sunday's quake would decrease in size, however from Monday to Tuesday the opposite occurred.
A minor earthquake rattled Pohang on Tuesday, the 82nd
aftershock of the 5.4-magnitude quake that struck the industrial city southeast of the Korean Peninsula on Nov.
MORE Britons flew into the Greek island of Kos yesterday as it was hit by strong
aftershocks following Friday's quake.
Historical earthquakes show that mainshock-aftershock sequence-type ground motions are formed when frequent
aftershocks occur after a strong mainshock [1].
Figure 10 compares the response spectrum of the soil acceleration ([a.sub.S]) under the footing during the mainshock and the
aftershocks. The response spectra of [a.sub.S] obtained from the
aftershocks are very similar.
ISLAMABAD --
Aftershocks, which shook the Federal Capital during current month, have been caused by a new faultline.
Also between 2,5 and 3,0 magnitudes of
aftershocks rocked the region.
