Earthquake Risk in the Fraser Valley: What Buyers Should Ask

Southwestern British Columbia sits above an active plate boundary, and earthquake is the one major peril a BC strata corporation is not required to insure against. Those two facts belong together on your reading list, and most buyers never put them there.

Where the Fraser Valley actually sits

Natural Resources Canada describes southwestern British Columbia as one of the most seismically active regions in Canada.

The GeoFacts sheet on earthquakes in southwestern BC sets out the numbers. Approximately 400 earthquakes occur each year in the region extending from the north end of Vancouver Island to Seattle. About a dozen of those are felt by people, and many of the larger ones happen offshore. NRCan states that earthquakes capable of causing structural damage happen every decade or so.

The region sits above the boundary between the oceanic Juan de Fuca Plate and the continental North American Plate. NRCan calls this boundary the Cascadia Subduction Zone, and it spans 1000 km from northern Vancouver Island to northern California. The Juan de Fuca Plate is descending beneath the North American Plate at about four centimetres per year.

Three different kinds of earthquake

NRCan separates the shaking into three sources, and they behave differently.

North American Plate earthquakes happen in the overriding plate, closest to the surface. NRCan notes that the closer an earthquake is to the surface, the stronger the shaking will be. Southwestern BC's largest recorded earthquake was one of these: a magnitude 7.3 on June 23, 1946, near Courtenay. In communities close to the epicentre, 75 per cent of chimneys were damaged, and people felt the shaking in Victoria, Vancouver, and as far east as the Rocky Mountains.

Juan de Fuca Plate earthquakes occur in the subducting plate at depths of 40 to 60 kilometres, in a band stretching from mid-Georgia Strait to southern Puget Sound. NRCan describes these as the most frequent type of damaging earthquake in the region. The 2001 magnitude 6.8 event that shook Seattle was one, felt in Victoria and Vancouver, and it caused $2 billion in 2001 dollars of damage.

Plate boundary earthquakes are the megathrust events. NRCan puts the potential rupture area west of Vancouver Island, with magnitudes up to 9.

What the record says about megathrusts

The last Cascadia megathrust earthquake occurred on January 26, 1700.

NRCan records that the entire zone from northern Vancouver Island to northern California ruptured in an estimated magnitude 9 event. We know the date and time precisely because written records of the tsunami damage on the east coast of Japan document it. Vancouver Island First Nations oral histories describe the same tsunami destroying a village at Pachena Bay, leaving no survivors.

On frequency, Earthquakes Canada reports that 13 megathrust events have been identified in the last 6000 years, an average of one every 500 to 600 years. The intervals between them have ranged from 200 to 800 years. An average describes the record rather than scheduling the next one, which is the honest way to read that figure.

The gap in strata insurance

Here is the part that affects the deal in front of you.

Section 149 of the Strata Property Act requires a strata corporation to obtain property insurance on common property, common assets, and the buildings shown on the strata plan. Section 149(4) requires that insurance to be on the basis of full replacement value except in prescribed circumstances, and to insure against the major perils set out in the regulations plus any other perils specified in the bylaws.

The regulation defines those major perils as fire, lightning, smoke, windstorm, hail, explosion, water escape, strikes, riots or civil commotion, impact by aircraft and vehicles, vandalism and malicious acts.

Earthquake is not on that list. The Province states directly that strata corporations are not required to obtain earthquake insurance because earthquake is not a peril listed in the regulation, while adding that strata corporations in earthquake-prone areas of British Columbia are strongly advised to purchase it.

So coverage exists where a strata chose to buy it. That is a decision made by a particular strata, in a particular year, and it is recorded in documents you can read before you commit.

How the deductible works, and why it is different

Earthquake deductibles are not written the way the rest of the policy is.

The Province notes that earthquake deductibles are typically shown as a percentage of the value of the property. A flat deductible stays the same regardless of the building. A percentage deductible scales with replacement value, so the same percentage produces a much larger figure on a large complex than on a small one.

This matters to an owner because of how deductibles travel. Our strata insurance deductible chargeback guide covers the mechanics of how a deductible can reach individual owners, and our water damage deductibles post walks through the more common version of the same problem. The earthquake version follows the same logic with a different arithmetic.

Ask two questions, in this order. Does the policy include earthquake coverage. If it does, what is the deductible percentage and what does that work out to in dollars for this building.

Where the answers live in the strata package

You do not need to phone anyone to start. The documents carry most of this.

The insurance summary or certificate in the strata document package sets out what is covered and what the deductibles are. Read the whole thing. The first page rarely carries the deductible detail. Our strata documents review checklist covers the wider package and what each piece tells you.

Council minutes and annual general meeting minutes are where the insurance conversation actually happens. Renewals, premium increases, and decisions about whether to keep or drop optional coverage get discussed there before they show up anywhere else. Our council minutes red flags guide covers how to read them. If a strata dropped earthquake coverage to manage a premium, the minutes are where that decision is recorded.

The depreciation report speaks to the building's components and their expected replacement timing, which is separate from insurance but part of the same picture of how a complex is being looked after.

If the package leaves the question open, ask the listing agent to have the strata or its property manager confirm the position in writing. Do that inside your subject period, and give yourself enough room for the answer to come back. Our subject removal guide covers protecting that time.

What your own policy does

The strata's policy and your policy are two different things.

Our condo insurance versus strata insurance post covers the split in general terms. On earthquake specifically, the question for your broker is what your personal policy responds to if a deductible is charged back to owners, and whether that is standard in the policy or an option you have to add.

Ask for the answer as a number. Coverage toward a deductible has a limit, and the limit is the part that matters. Get that figure while you still have dates to work with.

Where a buyer's judgment ends

We are agents, not engineers or insurance advisors.

How a specific building would perform in an earthquake is engineering work. A general home inspection is a visual condition assessment, and answering that question sits outside its scope. Our home inspection guide covers what an inspection does and does not include. If seismic performance is a question you want answered for a particular building, a qualified professional engineer is who answers it.

The same applies to the insurance side. Your own licensed insurance broker is the right source on what a policy covers. Nothing here is a substitute for either, and none of it is advice about a specific property.

The short version

Southwestern BC is one of the most seismically active regions in Canada, and Natural Resources Canada counts approximately 400 earthquakes a year there, with damaging events every decade or so. The last megathrust was in 1700, and the record shows 13 in 6000 years.

Under Section 149 of the Strata Property Act and the major perils in the regulation, a BC strata is not required to insure against earthquake. Where the coverage exists, a strata chose to buy it, and the deductible is written as a percentage of replacement value rather than a flat figure.

Find both answers in the insurance summary and the minutes during your subject period, then ask your own broker what your policy adds. That turns a vague worry into a line in your ownership budget.

If you are working through a strata package and are not sure what you are looking at, book a 20-minute chat with the FRIVE team. We will read it with you and tell you which questions are worth asking the strata before your dates come up.

Key takeaways

• Natural Resources Canada counts approximately 400 earthquakes a year in the region from northern Vancouver Island to Seattle, with about a dozen felt and damaging events every decade or so.
• The last Cascadia megathrust was January 26, 1700, an estimated magnitude 9, and NRCan has identified 13 such events in the last 6000 years.
• Section 149 of the Strata Property Act requires insurance against the major perils in the regulation, and earthquake is not among them.
• Earthquake deductibles are written as a percentage of the building's replacement value, so the dollar figure scales with the complex.
• The insurance summary, the council minutes, and your own broker are the three places the answers live.

Frequently Asked Questions

Is earthquake insurance required for a strata in BC?

No. Section 149 of the Strata Property Act requires a strata corporation to insure against the major perils set out in the regulations. Those perils are fire, lightning, smoke, windstorm, hail, explosion, water escape, strikes, riots or civil commotion, impact by aircraft and vehicles, vandalism and malicious acts. Earthquake is not on that list, so whether a particular strata carries it is a decision that strata made.

How seismically active is southwestern British Columbia?

Natural Resources Canada describes southwestern BC as one of the most seismically active regions in Canada. Approximately 400 earthquakes occur each year in the region extending from the north end of Vancouver Island to Seattle. About a dozen of those are felt by people, and NRCan states that earthquakes capable of causing structural damage happen every decade or so.

When was the last Cascadia megathrust earthquake?

The last Cascadia megathrust earthquake occurred on January 26, 1700, according to Natural Resources Canada. The entire zone from northern Vancouver Island to northern California ruptured in an estimated magnitude 9 event, one of the largest earthquake types the region can produce. Written records of the tsunami damage on the east coast of Japan provide the precise date and time, and Vancouver Island First Nations oral histories independently describe the same tsunami destroying a village at Pachena Bay. NRCan has identified 13 such events in the last 6000 years, an average of one every 500 to 600 years.

How often do megathrust earthquakes happen on the Cascadia zone?

Natural Resources Canada has identified 13 megathrust events in the last 6000 years, an average of one every 500 to 600 years. The intervals between them have ranged from 200 to 800 years, so the average describes the record rather than predicting the next one.

How do I find out if a strata has earthquake coverage?

Read the insurance summary or certificate in the strata document package, and read the council minutes and annual general meeting minutes around each renewal. If the package does not make the answer clear, ask the listing agent to have the strata or its property manager confirm it in writing before you remove subjects.

What is an earthquake deductible on a strata policy?

The Province of BC notes that earthquake deductibles are typically shown as a percentage of the value of the property rather than a flat dollar figure. That structure means the deductible scales with the building's replacement value, so the figure on a large complex can be substantial. Ask what the percentage is and what it works out to for that specific building.

Does my own condo insurance cover the strata's earthquake deductible?

That depends entirely on the policy you buy. Some personal policies offer coverage toward a deductible a strata may charge back to owners, sometimes as an option rather than as standard. Ask your own insurance broker what your policy does and does not respond to, and confirm the amount before you rely on it.

Does a home inspection assess earthquake resistance?

A general home inspection is a visual assessment of condition and is not a structural or seismic engineering assessment. An inspector may note visible issues and can recommend a specialist. Assessing how a building would perform in an earthquake is engineering work, done by a qualified professional engineer.

Does soil type change earthquake shaking?

Ground conditions affect how shaking is experienced at a given site, which is one reason seismic assessment is site-specific engineering work rather than something a buyer can judge from a listing. A qualified geotechnical or structural engineer is the right source for a specific address.

Should earthquake risk stop me from buying in the Fraser Valley?

That is your decision, and in our experience it is rarely the deciding factor on its own. Treat it the way you treat the rest of the strata package: find out what coverage exists, what the deductible looks like, and what your own policy adds, then price that into the ownership cost rather than discovering it later.