Earthquakes   

Did you know that the City of Laval lies in a seismic zone? That does not mean that earthquakes are more frequent than they are elsewhere, but that the risk of damage is higher if and when they do occur.

Measuring seismic activity and its consequences

An earthquake is an unpredictable phenomenon. While the majority of earthquakes are minor, some can reach strong magnitudes that entail a significant risk of damages.  

The Richter scale is used to measure the force of an earthquake. [lien externe] This scale from 0 to 9 determines the intensity of the earthquake at its point of origin, with 9 being the strongest. For example, an earthquake with a magnitude between 3.5 and 5.4, though often felt, causes little or no damage. An earthquake measuring a magnitude 7 on the Righter scale, on the other hand, is a major earthquake that can cause significant damages.

The following factors can exacerbate the effects of an earthquake:  

  • Soil type  
  • Structure of buildings 
  • Type of construction materials used 
  • etc. 

An earthquake can have multiple consequences, including:  

  • damage to buildings 
  • fires 
  • dam failures 
  • gas and hazardous materials leak  
  • power outages  
  • shortage or contamination of water 
  • etc. 

In Laval, the following types of buildings are more vulnerable to earthquakes: 

  • Buildings that were constructed before the adoption of earthquake-resistant building standards. 
  • Fragile structures, such as buildings with poorly maintained masonry walls or structural weaknesses. 
  • Buildings housing vulnerable clienteles: hospitals, retirement homes, and other establishments that take in vulnerable populations. 
  • Very high buildings, which are more susceptible to earthquake tremors. 
  • Buildings on unstable, soft or sandy soil, which can amplify vibrations or liquefy during an earthquake. 

How to stay protected in the event of an earthquake

  • Prepare for a possible disaster by following our recommendations: have a family safety plan, ensure that you can be autonomous for a minimum period of 72 hours, and keep a ready-to-go emergency kit in case you have to evacuate. 
  • Secure to the wall furniture that is placed at a height as well as large items that could tip over, such as bookcases, shelves, heavy electronic devices, refrigerators, etc.  
  • Do not place heavy objects on a top shelf or above a bed. 
  • Store flammable chemical products in a place that would limit their dispersal if they were overturned, and keep them far from any heat source. 
  • In general, basic home insurance does not cover earthquakes. Check with your insurer to see if you are covered. 
  • Make sure your property is compliant with regulations and meets the applicable earthquake-resistance standards: 

If you are indoors: 

  • Stay indoors. Do not try to evacuate the building while the earth is shaking, as doing so would put you at greater risk of injury. 
  • If you are in an elevator, get out at the first available floor. 
  • Drop down to avoid falling. 
  • Shelter under a solid piece of furniture, e.g., a table, a desk or a bed, so that objects don’t fall on you.  
  • Keep a safe distance from bookcases, shelves, heavy electronic devices, refrigerators, etc. 
  • If you are unable to find shelter, stay far from windows, mirrors, glass partitions, lighting fixtures, bookcases and shelves, and lean back against a wall. 
  • Do not shelter at the foot of a door frame, as you would not be protected from objects thrown during the quake. 
  • Hang onto the article of furniture protecting you and use your arm to protect your head and neck. 
Actions à faire pendant le séisme

If you are outdoors: 

  • Stay outdoors and move away from buildings, power lines, advertising billboards, and other structures susceptible to collapsing. 
  • If you are in a busy public space, find a quiet place in which to shelter and avoid crowd surges. 
  • If you are inside a vehicle, stop in a safe location where you are not blocking the road, and stay far from any structure that could collapse. 

After the last tremor and in the days that follow: 

  • If you have doubts concerning a building’s structural integrity (cracks, partial collapse, etc.), calmly evacuate the premises and find a place far from buildings, trees, power lines and other structures susceptible to collapsing. 
  • Gather together the building’s occupants to determine if anyone is injured or if people are missing.  
  • Without putting yourself in danger, provide assistance to your neighbours and administer first aid, if necessary. 
  • Stay alert for possible aftershocks. 
  • Listen for directives from public authorities via on-site emergency response teams, alerts issues by the city or messages broadcast on the radio, television, by telephone, or on the Web. 
  • If the telephone network is still functional, limit your usage to emergency calls only. 
  • If possible, wear sturdy footwear and clothing that covers the entire body to avoid injury. 
  • If your home is safe to enter, inspect it and avoid danger in any form. 
  • Inspect your home, keeping an eye out for unstable furniture, a fragile brick wall, a downed power line, a hazardous materials spill, a natural gas leak, a water leak, damaged electrical appliances, a fire, etc.  
  • If required, shut off the power, water and natural gas as soon as you return home. 
  • Document the damages by taking notes and photos. 
  • If the building sustained damage, have a structural engineer evaluate its integrity and do not move back in until you receive approval to do so from the engineer. 
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