catastrophe modeling firm AIR global, has issued a report on
the powerful M6.6 earthquake that struck off the coast of Canada’s Vancouver
Island at about three:10 a.m. UTC (8:10 p.m. nearby time) a at a intensity of
11.4 km (7.1 miles).
AIR cited that to this point “no accidents were pronounced,
and there may be no tsunami warning in effect, in step with the country wide
Tsunami warning middle. smaller
aftershocks of M5.zero and M4.2 were additionally stated.”
AIR said it “does now not count on any sizable losses from
this event due to the fact this occasion befell offshore and near a in
moderation populated vicinity of Victoria. the principle quake reportedly
lasted approximately 10 seconds. In downtown Vancouver a few citizens in high
rises said they felt their building sway. Others in homes closer the epicenter
suggested swinging chandeliers. No local warnings were issued, and firefighters
did no longer ought to respond to any emergencies.”
Dr. Bingming Shen-Tu, assistant vice president and senior
most important scientist at AIR international, defined that the “earthquake and
its aftershocks passed off at the northern or northwestern edge of the Cascadia
subduction sector in which the North American Plate meets the Explorer and Juan
de Fuca plates.
“It took place in the Nookta fault sector that borders the
Juan de Fuca and Explorer plates. Seismicity close to the Nootka fault zone and
farther north and northwest alongside the Explorer/Pacific plates and North
American plate limitations has been very active inside the beyond century. The
most latest huge quake changed into a value 7.eight event that shook Haida
Gwaii, about 500 km (310 miles) north of the day past’s earthquake. there was
little harm and no tsunami become generated by using that quake.”
He added: “South of the Nootka fault, tectonic forces have
driven the Juan de Fuca plate below the North American plate and created the
Cascadia subduction area. but, earthquake activity in the Cascadia subduction
quarter has been very quiet in the beyond century.”
some scientists have speculated that for the past three
centuries, those plates have been locked together, generating vast stress in
the Cascadia subduction sector.
“when this stress is released, effective earthquakes can
arise, inclusive of the ambitious M9.0 event that struck the area in 1700. in step
with geological proof, the Cascadia subduction quarter gives upward push to
such megathrust earthquakes every three hundred to 800 years.”
Dr. Shen-Tu said that these conditions may want to purpose
“a huge megathrust earthquake in the Cascadia subduction quarter, which could
probable “devastate Victoria and Vancouver in British Columbia, and critically
harm cities in the northwestern america, together with Seattle and Portland.
Such an earthquake may generate a effective tsunami that might inundate seashores
alongside the west coast of North the united states and reason damage in
countries throughout the Pacific Ocean, along with Japan.”
according to AIR, “approximately seventy five percentage of
residential homes in Canada are of wood frame production; the second one most
not unusual residential structure type in Canada is masonry. In British
Columbia, over ninety percent of houses are wood body. wood construction has
traditionally done nicely in earthquakes, because of its mild weight and
excessive cloth electricity.
“Nail connections in timber frame construction permit
flexibility, and consequently permit timber systems to take in big quantities
of power at some stage in earthquake shaking compared to other building sorts.
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