Earthquake Safety Information

WHAT IS AN EARTHQUAKE?

An earthquake is a sudden, rapid shaking of the Earth caused by the breaking and shifting of rock beneath the Earth's surface. For hundreds of millions of years, the forces of plate tectonics have shaped the Earth as the huge plates that form the Earth's surface move slowly over, under, and past each other. Sometimes the movement is gradual. At other times, the plates are locked together, unable to release the accumulating energy. When the accumulated energy grows strong enough, the plates break free causing the ground to shake. Most earthquakes occur at the boundaries where the plates meet; however, some earthquakes occur in the middle of plates.


Ground shaking from earthquakes can collapse buildings and bridges; disrupt gas, electric, and phone service; and sometimes trigger landslides, avalanches, flash floods, fires, and huge, destructive ocean waves (tsunamis). Buildings with foundations resting on unconsolidated landfill and other unstable soil, and trailers and homes not tied to their foundations are at risk because they can be shaken off their mountings during an earthquake. When an earthquake occurs in a populated area, it may cause deaths and injuries and extensive property damage.

The Northridge, California, earthquake of January 17, 1994, struck a modern urban environment generally designed to withstand the forces of earthquakes. Its economic cost, nevertheless, has been estimated at $20 billion. Fortunately, relatively few lives were lost. Exactly one year later, Kobe, Japan, a densely populated community less prepared for earthquakes than Northridge, was devastated by the most costly earthquake ever to occur. Property losses were projected at $96 billion, and at least 5,378 people were killed. These two earthquakes tested building codes and construction practices, as well as emergency preparedness and response procedures.

Where earthquakes have occurred in the past, they will happen again. Learn whether earthquakes are a risk in your area by contacting your local emergency management office, American Red Cross chapter, state geological survey, or department of natural resources.

Earthquakes strike suddenly, without warning. Earthquakes can occur at any time of the year and at any time of the day or night. On a yearly basis, 70 to 75 damaging earthquakes occur throughout the world. Estimates of losses from a future earthquake in the United States approach $200 billion.

There are 45 states and territories in the United States at moderate to very high risk from earthquakes, and they are located in every region of the country. California experiences the most frequent damaging earthquakes; however, Alaska experiences the greatest number of large earthquakes—most located in uninhabited areas. The largest earthquakes felt in the United States were along the New Madrid Fault in Missouri, where a three-month long series of quakes from 1811 to 1812 included three quakes larger than a magnitude of 8 on the Richter Scale. These earthquakes were felt over the entire Eastern United States, with Missouri, Tennessee, Kentucky, Indiana, Illinois, Ohio, Alabama, Arkansas, and Mississippi experiencing the strongest ground shaking.

AWARENESS INFORMATION

Expect aftershocks. Aftershocks are smaller earthquakes that follow the main shock and can cause further damage to weakened buildings. After-shocks can occur in the first hours, days, weeks, or even months after the quake. Be aware that some earthquakes are actually foreshocks, and a larger earthquake might occur.

Ground movement during an earthquake is seldom the direct cause of death or injury. Most earthquake-related injuries result from collapsing walls, flying glass, and falling objects as a result of the ground shaking, or people trying to move more than a few feet during the shaking. Much of the damage in earthquakes is predictable and preventable. We must all work together in our communities to apply our knowledge to building codes, retrofitting programs, hazard hunts, and neighborhood and family emergency plans.

EMERGENCY INFORMATION

  1. The best protection during an earthquake is to get under heavy furniture such as a desk, table, or bench
  2. The greatest danger exists directly outside buildings, at exits, and alongside exterior walls. Many of the 120 fatalities from the 1933 Long Beach earthquake occurred when people ran outside of buildings only to be killed by falling debris from collapsing walls.

Ground movement during an earthquake is seldom the direct cause of death or injury. Most earthquake-related casualties result from collapsing walls, flying glass, and falling objects.

DANGER ZONES

Earthquakes occur most frequently west of the Rocky Mountains, although historically the most violent earthquakes have occurred in the central United States. All 50 states and all U.S. territories are vulnerable to earthquakes. Forty-one states or territories are at moderate to high risk.

HELP YOUR COMMUNITY GET READY

The media can raise awareness about earthquakes by providing important information to the community. Here are some suggestions:

  1. Publish a special section in your local newspaper with emergency information on earthquakes. Localize the information by printing the phone numbers of local emergency services offices, the American Red Cross, and hospitals.
  2. Conduct a week-long series on locating hazards in the home.
  3. Work with local emergency services and American Red Cross officials to prepare special reports for people with mobility impairments on what to do during an earthquake.
  4. Provide tips on conducting earthquake drills in the home. Interview representatives of the gas, electric, and water companies about shutting off utilities.

DID YOU KNOW...

WHAT SHOULD I DO BEFORE THE EARTHQUAKE STRIKES ?

Develop a Family Disaster Plan:

Disaster can strike quickly and without warning. It can force you to evacuate your neighborhood or confine you to your home. What would you do if basic services--water, gas, electricity or telephones--were cut off? Local officials and relief workers will be on the scene after a disaster, but they cannot reach everyone right away.

Families can--and do--cope with disaster by preparing in advance and working together as a team. Follow the steps listed in this brochure to create your family's disaster plan. Knowing what to do is your best protection and your responsibility.

Where will your family be when disaster strikes? They could be anywhere--at work, at school or in the car. How will you find each other? Will you know if your children are safe?

Steps to Safety:

Find Out What Could Happen to You. Contact your local emergency management or civil defense office and American Red Cross chapter--be prepared to take notes:

Create a Disaster Plan. Meet with your family and discuss why you need to prepare for disaster. Explain the dangers of fire, severe weather and earthquakes to children. Plan to share responsibilities and work together as a team. 

Complete This Checklist

Practice and Maintain Your Plan

Emergency Supplies

Keep enough supplies in your home to meet your needs for at least three days. Assemble a Disaster Supplies Kit with items you may need in an evacuation. Store these supplies in sturdy, easy-to-carry containers such as backpacks, duffle bags or covered trash containers.

Include: 

Utilities

Neighbors Helping Neighbors

Working with neighbors can save lives and property. Meet with your neighbors to plan how the neighborhood could work together after a disaster until help arrives. If you're a member of a neighborhood organization, such as a home association or crime watch group, introduce disaster preparedness as a new activity. Know your neighbors' special skills (e.g., medical, technical) and consider how you could help neighbors who have special needs, such as disabled and elderly persons. Make plans for child care in case parents can't get home.

Home Hazard Unit

Evacuation

If Disaster Strikes

If disaster strikes remain calm and patient. Put your plan into action. Check for injuries. Give first aid and get help for seriously injured people. Listen to your battery powered radio for news and instructions. Evacuate, if advised to do so. Wear protective clothing and sturdy shoes.

Check for damage in your home...

Remember to....

If you are at risk from earthquakes:

Create a Disaster Supplies Kit:

Why Talk About a Disaster Supplies Kit?

After a disaster, local officials and relief workers will be on the scene, but they cannot reach everyone immediately. You could get help in hours, or it may take days. Basic services, such as electricity, gas, water, and telephones, may be cut off, or you may have to evacuate at a moment’s notice. You probably won’t have time to shop or search for the supplies you’ll need. Your family will cope best by preparing for disaster before it strikes.

Local officials and relief workers will be on the scene, but they cannot reach everyone immediately. You could get help in hours, or it may take days...you probably won’t have time to shop or search for the supplies you’ll need.

What Is a Disaster Supplies Kit?

Assembling the supplies you might need following a disaster is an important part of your Family Disaster Plan. Following a disaster, having extra supplies at home or supplies to take with you in the event of an evacuation can help your family endure evacuation or home confinement. Learn more about Disaster Supplies Kits by contacting your local emergency management agency or your local American Red Cross chapter.

Awareness Information

Involve Children in Disaster Preparedness. Ask children to help you remember to keep your kits in working order by changing the food and water every six months and replacing batteries as necessary. Children might make calendars or posters with the appropriate dates marked on them. Ask children to think of items that they would like to include in their own Disaster Supplies Kit, such as books or games or appropriate nonperishable food items.

Prepare Your Kit

Tips for Your Disaster Supplies Kit

Disaster Supplies Kit Basics

The following items might be needed at home or for an evacuation. Keeping them in an easy-to-carry backpack or duffel bag near your door would be best in case you need to evacuate quickly, such as in a tsunami, flash flood, or major chemical emergency. Store your kit in a convenient place known to all family members. Kit basics are:

If you have additional space, consider adding some of the items from your Evacuation Supplies Kit.

Evacuation Supplies Kit

Place in an easy-to-carry container the supplies you would most likely need if you were to be away from home for several days. Label the container clearly. Remember to include:

To Build a Makeshift Toilet

Home Disaster Supplies Kit

In addition to your Disaster Supplies Kit basics and Evacuation Supplies Kit, gathering the following items will help your family endure home confinement, which often happens following disasters and may include the loss of utilities.

Also, consider using a NOAA Weather Radio with the tone-alert feature in your home. NOAA Weather Radio is the best means for receiving warnings from the National Weather Service. The National Weather Service continuously broadcasts updated weather warnings and forecasts that can be received by NOAA Weather Radios sold in many stores. NOAA Weather Radio now broadcasts warning and post event information for all types of hazards--both natural (such as earthquakes and volcanic activity) and technological (such as chemical releases or oil spills). Working with other federal agencies and the Federal Communications Commission’s new Emergency Alert System, NOAA Weather Radio is an "all hazards" radio network, making it the single source for the most comprehensive weather and emergency information available to the public. Your National Weather Service recommends purchasing a radio that has both a battery backup and a Specific Area Message Encoder (SAME) feature, which automatically alerts you when a watch or warning is issued for your county, giving you immediate information about a life-threatening situation. The average range is 40 miles, depending on topography; the National Weather Radio signal is a line-of-sight signal, which does not bore through hills or mountains.

Water

Having an ample supply of clean water is a top priority in an emergency:

Water needs to be treated only if it is of questionable purity:

Food

Even though it is unlikely that an emergency would cut off your food supply for two weeks, you should consider preparing a supply that will last that long. The easiest way to develop a two-week stockpile is to increase the amount of basic foods you normally keep on your shelves. If your water supply is limited, try to avoid foods that are high in fat and protein, and don’t stock salty foods, since they will make you thirsty. Familiar foods can lift morale and give a feeling of security in time of stress. Also, canned foods won’t require cooking, water, or special preparation. Take into account your family’s unique needs and tastes. Try to include foods that they will enjoy and that are also high in calories, protein, carbohydrates, vitamins, and minerals.

First Aid Kit

Assemble a first aid kit for your Disaster Supplies Kit and one for each car.

Important Documents

Protect Your Property

DURING AN EARTHQUAKE

AFTER THE EARTHQUAKE

Guardian Insurance does not endorse the content of these articles and they are provided merely for information. These articles are reproduced with the permission of the Author.