Phivolcs said the quake was an aftershock
of the magnitude 5.5 quake that hit the province last July 13.
"It's traumatic … we're still feel strong aftershocks
," Edna Gato, a school teacher in Itbayat town, told Reuters.
Engineer Hermie Daquipa, head of Phivolcs Kidapawan station, said the aftershocks
could continue from three months until one year.
When an aftershock
is bigger than the main quake, the first quake is renamed as a foreshock, Jones explained.
"I think we have already had probably an excess of 20 3.5 (magnitude aftershocks
)," (https://www.cbsnews.com/live-news/earthquake-california-today-6-4-magnitude-hits-near-ridgecrest-today-2019-07-04-live-updates/) said Dr.
While the strongest aftershock
has been recorded at 5.6 on the Richter Scale, the mildest one is at 3.4, according to Chairperson Dwikorita Karnawati.
1 -- Google has announced that it is working with researchers at Harvard in using Artificial Intelligence to help predict earthquakes aftershock
gradually increased in size and began to measure a magnitude of 4 then 5, eventually resulting in yesterday's magnitude 6.0 quake.
, 2.5-magnitude on the Richter scale, happened at 9:18 a.m.
Britons had slept out on sunloungers in fear of aftershocks
following the quake, which killed two.
It is also found from Table 3 that the average [PGA.sub.AS]/[PGA.sub.MS] is approximate to 1, indicating that the average intensity of aftershocks
is equal to that of mainshocks.
Figure 12 compares the horizontal acceleration developed at the footing ([a.sub.F]) during the mainshock and aftershocks
. While Figure 12(a) shows the effect of aftershock
by comparing the footing response obtained from the mainshock and the first aftershock
, Figure 12(b) illustrates the effect of subsequent aftershock
on the footing acceleration.