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Copy of PREPARING FOR THE BIG ONE
Transcript of Copy of PREPARING FOR THE BIG ONE
Sign up online at alert.seattle.gov
Tune in to local emergency radio stations
AM 710, AM 1000, FM 97.3 and FM 9.7
Tune into local television
Follow City departments on social media
(Twitter, Facebook, NextDoor, Reddit)
@CityofSeattle @SeattlePD @SeattleFire @SeattleDOT @SeattleSPU @SEAcitylight
Go to your nearest emergency hub
Shut off water at the main house valve
Typically located right outside your house or inside
This saves the water in your hot water heater
and toilet from possible contamination
Turn off power to the water heater - attach a hose
Shut off natural gas ONLY if necessary
Only shut it off if you smell natural gas, hear
a hissing sound, or dial is spinning rapidly
Shut off electricity ONLY if natural gas meter is damaged
This will help prevent a fire
Check to see if your home sustained structural damage
Rope off damaged areas so others know
Start by planning with 1-2
people who live near you
Check on one another after a disaster
(Who has children, pets, lives alone, special needs?)
Helping may also include sharing supplies, a mutual agreement of checking on each other's home if the disaster strikes when your away
Find out your neighbor's unique skills
(i.e. CPR cert, First Aid, Mechanical, etc.)
It will make getting through a
disaster easier until help arrives
You don't know where you'll be when the disaster strikes. Have smaller kits in your car and at work.
The things you rely on daily will be significantly disrupted
Earthquakes are the top hazard
It's not IF it happens, it's WHEN.
Let's Be Frank
2. Snow and Ice
5. Power Outages
7. Disease Outbreaks
9. Excessive Heat
13. Transportation Accidents
14. Water Shortages
15. Social Unrest
16. HAZMAT Incidents
18. Active Shooter
Stores may quickly run out of supplies
Everything you need to know about Earthquakes
Earthquake will destroy Seattle!
No other hazard has the combination of likelihood and potential destructiveness
What is an earthquake?
PREPARING FOR 'THE BIG ONE'
What we already know...
Earthquakes, Nothing New for Seattle
Seattle is vulnerable to major earthquakes
A major quake is highly probable in 50 years
Returning to normal will take a long time
People will be on their own
Services will be unavailable
Citywide plans are in place
Earthquakes in Seattle
The Earth is like a moving puzzle
What causes earthquakes?
Are the edge of the tectonic plates
Plate boundaries are made up of many faults
Most earthquakes around
the world occur on these faults
Since the edges of the plates are
rough, they get stuck while the
rest of the plate keeps moving
Finally, when the plate has moved far
enough, the edges unstick on one of
the faults and there is an earthquake
Shallow quakes = X on diagram
1. Crustal or Shallow Quakes
Types of Alerts
Sign up for emergency alerts
First responders may not be able to help you for some time
Hospitals may be overwhelmed
Phones, cable TV, and internet may not work
Gas stations and ATM machines may not work
Utilities may be damaged (electricity, water, sewer)
People may not be able to get anywhere easily (roads, bridges damaged; transit will stop)
a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.
The skin is not all one piece - it is made up of many pieces, like a puzzle
Earth has four major layers: inner core, outer core, mantle and crust.
The crust and top of the mantle make up a thin skin on surface of our planet
The puzzle pieces (tectonic plates) keep slowly moving, sliding past each other and bumping into one another
The Seattle area experiences three earthquake types with three very different consequences
1. Crustal or
2. Intraplate or
3. Subduction Zone or
Did you know?
Seattle Fault Quake
Secondary Impacts of Seattle Fault Quake
These faults occur in the North American Plate at 0-30 km near the crust's surface
Intense shaking occurs near epicenter, then diminishes quickly
Shallow quakes are expected on the
Extends east-west through the middle of the City
Could be as large as magnitude 7.5, but
less than 7.0M is more probable
Most recent was 1,100 years ago
Has been active 3-4 times in the past 3,000 years
An earthquake on the Seattle Fault poses the greatest risk to Seattle
2013 research finds that Seattle is at risk of thousands of landslides following a strong (M7) Seattle Fault quake.
A large Seattle fault quake could trigger a 16ft. tsunami that would strike the shoreline within seconds and flood it within 5 minutes.
M7 Seattle fault quake could cause dozens
of fires. Suppressing fires would be more difficult because
of reduced water pressure.
Structural failure and fires would cause multiple hazardous materials releases, from minor to major incidents.
2. Intraplate or Deep Quakes
These faults occur at depths of 30-70 km in oceanic crust as it dives under continental crust
Because of depth, buildings located directly above epicenter are far enough away that ground motions are attenuated
The 2001 Nisqually Earthquake was a magnitude 6.8
Deep quakes = O on diagram
Most common large earthquakes that occur in Puget Sound Region
Quakes larger than 6.0M occurred in 1909, 1939, 1949, 1965 and 2001
Combined property damage for quakes in 1949 and 1965 amounted to $400 million; 2001 amounted to $36 million to City property
3. Subduction Zone or Megathrust Quakes
These faults occur on the interface between the North American
plate and the San Juan de Fuca plate, a small plate extending from Northern CA to BC
Largest types of quakes in the world
Quake on the Cascadia Subduction Zone is commonly referred to as
'The Really Big One'
2011 Japan Earthquake and Tsunami was a subduction zone quake
How long did the Nisqually
Quake shake for?
The Sky is Falling!
The Really Big One
Subduction zone quakes are the greatest risk to the region as a whole
Could reach a magnitude 9.0+ and affect an area from Canada to Northern California
Shaking in Seattle would be violent and prolonged, but not as intense as Seattle Fault quake
Subduction zone quakes occur in this area about every 500 years
Other Key Facts
About 15% of Seattle's total area is soil that is prone to ground failure in earthquakes. The Duwamish Valley, Interbay and Rainier Valley are vulnerable to ground failure and shaking because of the liquefiable soils in these areas.
Seattle has an estimated 819 unreinforced masonry buildings that perform poorly in quakes. These older brick buildings tend to be concentrated in areas expected to experience the strongest ground motion during quakes.
Seattle is heavily dependent on bridges. Damage to them would impair emergency services and the economy. Despite retrofits, many will not be usable after a strong quake.
Combined property damage for quakes in 1949 and 1965 amounted to $400 million. The 2001 Nisqually Quake amounted to $36 million to City property.
What to do before an earthquake hits
1. Make a Plan
2. Build a Kit
3. Help Each Other
Prepare now before it
happens, not during
Plan to be on your
own for a minimum
of 7-10 days
History has shown...
Follow three simple
steps to be ready
Develop a Disaster Plan
Always plan for:
If you lose power
If you have to evacuate your home
If you have to shelter-in-place
If you are unable to travel
If you are unable to communicate
If your property is damaged
Develop a disaster plan
Retrofit your home
Sign-up for emergency alerts
Know how to turn off utilities
Plan for people,
pets and property
Retrofit Your Home
Include the following in your
Out of Area Contact
Ask yourself these questions:
What happens if we are separated?
Where can we meet?
How will we contact each other?
Who are our emergency contacts?
What if I have to report to work?
What if I'm at work and can't get home?
Who will watch the kids?
What about the school?
What about our pets?
Know your Neighborhood's Plan
Disaster Skills Workshop
I. Seattle Hazards
II. Earthquake Risk
III. Make a Plan
IV. Build a Kit
V. Help Each other
VI. Q&A Session
Secure the following:
Kitchen cabinets and contents
Go on a 30 min. hazard hunt
Attend a free home retrofit class
Was your home built before 1980?
Retrofit your home
See list of contractors on OEM's webpage
When emergencies happen, be the first to know. Stay informed with AlertSeattle to receive real-time, official notifications from the City of Seattle. This is a free service.
Basic Kit Supplies
Prepare to be on your own for 7-10 days
Think about what you use on a daily basis, and include those items in your kit.
Food and water are the most important.
Include your special needs
Emergency responders won't be able to help you. 911 dispatch will be overwhelmed. You're on your own.
Vehicle Kit Supplies
Take it to the next level: start up or join an existing SNAP group or Community Emergency Hub
Connect with your neighbors
What to do during an earthquake
Check on yourself and family
Don't run during the shaking
Drop, Cover and Hold
under a desk or table
If there's no table, find the nearest safe place beside
an inside wall or lower
If outside and in an open area, sit down and cover your head with your arms
If in the "danger zone"
next to a building, try to
get back into the building
to find shelter
Doorways are not a safe place to be
1. Check yourself and family for injuries
2. Check on your home
3. Check on others
4. Find out more information
Check yourself for injuries
Put on sturdy shoes
Check family members for injuries
Do basic first aid if needed
Your safety comes first
Check on your home
Check on others
Find out more information
Check on utilities and structure of your home
Go to your neighborhood
Focus on three priorities:
Control utilities and fire
Check on others
Care for injuries
Find out what is happening in the region
What to do after an earthquake
You'll be happy you prepared ahead of time when 'the big one' hits
Ask us anything you want to know
Thank you for attending
Kristin Tinsley & Matt Auflick
Seattle Office of