aftershock

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.