Local Geo Hazards
Earthquake Effects Aaron described what happens during and after an earthquake, showing examples of landslides, fires, flooding, and liquefaction. For example, this dramatic video of soil liquefaction in Japan shows what might happen during an earthquake in the Pacific Northwest. Many areas in Beaverton and Portland metro areas are at moderate to high risk for liquefaction.
Science and Engineering Links Aaron provided additional links with free tools for mapping your risks. His list included:
Preparedness Links Aaron emphasized the importance of getting prepared for an earthquake and other disasters. He provided the following links to help you take the next steps:
Retrofitting Your Home
Oregon Code Updates in 1986 In 1986, Oregon adopted a statewide building code for 1- and 2- family homes. This code required the wood structure of the house be attached to the foundation using ½" diameter bolts every 6 feet. If your house was built in 1986 or later, you should already have these bolts. If your house was built before 1986, you should consider a seismic upgrade to protect your house and your family's safety. Benefits and limitations of Seismic Upgrades According to Rick, the biggest benefit of a seismic upgrade is that it reduces the chance that your home will fall off its foundation. If your house falls off its foundation, it will be condemned and you won't be able to live in it. In an extended disaster from an earthquake, being able to live safely in your home as a shelter can make a big difference in your survival and could also significantly shorten the time it takes for your family to recover. Rick also described the limitations: a seismic upgrade won't protect your home from all damage during an earthquake. For example, seismic upgrades won't prevent damage or harm caused by items falling off walls and out of cabinets or furniture and appliances moving during an earthquake. The risk and damage from moving objects within a home can be substantial, so in addition to a seismic upgrade, he suggested that you take some simple steps to earthquake-proof your home, such as strapping down your hot water heater, installing cabinet latching devices, and securing photos and pictures to studs using closed-loop picture hangers. AcknowledgementsThank you to both of our knowledgeable speakers and Neighbors Ready! volunteers that made this event possible! Thank you to our guests and neighbors who showed up to listen and learn. AuthorKaren Ronning-Hall, Disaster Preparedness Evangelist, living in beautiful Portland, Oregon, with hubby Bill, daughter Geneva, Bean dog, Thumper kitty, Terry the turtle, and Theo the Bearded Dragon lizard.
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July 2024
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