The San Francisco-Oakland Bay Bridge was closed for more than a month because a portion of its eastern span collapsed. This closure and the collapse of the Cypress Freeway were the most dramatic of 142 road closures in the Bay Area. /AKLAND 3AN &RANCISCO 3ANTA #RUZ • Direct physical damage to buildings and structures totaled $6 billion; other related losses were an additional $4 billion (losses in 1989 dollars). !”!’ %ARTHQUAKE 3HAKING 3CENARIO 3AN !NDREAS &AULT 0ENINSULA 3EGMENT -AGNITUDE ( !6 ‘ 2 !0 +),/-%4%23 4% , % %4 34 !9 $7 /! “2 /!+,!.$ 6 ,/ ! 4 Modified Mercalli Intensity Shaking Severity Level ( 3 4 X-Very Violent 4( 3 4(4 3 6 4! 2 34 4% . ! / 4) IX-Violent ). . ! ” ,6 VIII-VeryStrong , $ 12 -),%3 0!” Some words of caution: • Because these hazard maps are based on general information, they are reasonably accurate for a neighborhood, but much less accurate for a particular address. • The maps in this booklet or on ABAG’s Web site are based on probabilities, so actual earthquakes could produce different damage patterns. 3!. The Association of Bay Area Governments (ABAG) operates a Web site designed to provide this information in the form of earthquake-shaking hazard maps at http://quake.abag.ca.gov/. These maps show expected shaking intensities in the Bay Area for various earthquake scenarios, such as a quake on the Peninsula segment of the San Andreas Fault or the northern Hayward Fault. These maps can be “zoomed in” to display your neighborhood. Other ABAG earthquake hazard maps show areas of liquefaction susceptibility, landslide hazards, potential fault ruptures, and tsunami inundation. ABAG even has maps for other natural hazards such as wildfires and flooding. -! 2 + How Do I Find Out the Expected Shaking in My Neighborhood? VII-Strong VI-Moderate V-Light Big Quakes Will Affect You Many Likely Earthquake Scenarios for the Bay Area Will Cause More Damage Than the Loma Prieta Earthquake… W hat if the Hayward Fault in the East Bay ruptured from San Pablo Bay to Fremont in an earthquake of magnitude 6.9, like Loma Prieta? If this scenario earthquake for the Hayward Fault occurs, areas of soft soils along the margins of San Francisco Bay, particularly in the East Bay, are likely to experience intense shaking and liquefaction. These areas are heavily urbanized and may have devastation similar to or greater than that of the area around the Cypress freeway structure in Oakland in 1989, shown below. “Scenario” ShakeMap for a Possible M 6.9 Earthquake on the Hayward Fault /AKLAND &REMONT This “scenario” ShakeMap shows predicted levels of shaking in the San Francisco Bay region for a possible magnitude (M) 6.9 earthquake on the Hayward Fault. Such scenario maps are computer generated using information about the projected quake magnitude, distances from the rupturing fault, and local geologic conditions. Scenario ShakeMaps are available online at http://quake.usgs.gov/ research/strongmotion/ effects/shake/archive/ scenario.html. (USGS photo) Projected Consequences and Implications for the Bay Area from a Magnitude 6.9 Earthquake on the Hayward Fault Facilities Projected Losses Who Is Taking Action? What Can I Do To Prepare? Housing • 80,000 to 160,000 homes and apartment units become uninhabitable (10 times the number in the Loma Prieta quake). • As many as 300,000 people are forced from their homes. • As many as 150,000 people require public shelter. • The American Red Cross, cities, and counties are planning for public shelters. • Bay Area city and county building departments have developed retrofit standards. • Retrofit your home, if needed (see pages 24 and 25). • Secure the contents of your home. • BART, Caltrans, and local public works departments are retrofitting the Bay Area’s transportation infrastructure. • Make a family plan for what to do if you are separated in a disaster (see pages 22 and 23). • Have earthquake disaster kits at home, at work, AND in your car (see page 23). Transportation • As many as 1,700 road closures (12 times the number in the Loma Prieta quake) will snarl commutes. • Only parts of the Bay Area Rapid Transit System (BART) will remain in operation. Source: Association of Bay Area Governments. 13 Why Should I Prepare? Your Life Could Change Unexpectedly in the Next Quake. Consider… Where will your family be? • Your children may be at school, day care, or other activities. • Family members may be at work or commuting. • Pets may run away or be injured. After the 2001 magnitude 6.8 Nisqually earthquake, this school in the Puget Sound area of Washington was closed for repair (Earthquake Engineering Research Institute photo). Pets are not allowed in most emergency shelters. Do you have a plan to feed and care for your animals after an earthquake? (Photos courtesy of Emergency Animal Rescue Service) Will you have medical services? • The 911 emergency system will likely be overloaded. • Hospitals and other medical facilities may be damaged. • Emergency rooms and trauma centers may be overwhelmed. This hospital in Sylmar, California, had to be demolished after the 1971 magnitude 6.7 San Fernando earthquake. Inset shows an ambulance that was crushed during the quake. (USGS photos) • Assisted living, critical care, and other health services such as dialysis may not be operational. Will you be able to get home? • Road damage and closures may restrict your ability to travel by car. • Public transportation, including buses, Bay Area Rapid Transit (BART), ferries, and airports may experience closures or interruptions in service. • Commute times may be dramatically increased. 14 The 1989 magnitude 6.9 Loma Prieta earthquake caused this section of the San Francisco-Oakland Bay Bridge to collapse (USGS photo). Big Quakes Will Affect You Will you be able to stay in your home? • Your home may be damaged and unsafe to live in. • Your personal property may be damaged or destroyed. • Construction materials and labor for repairs will be in limited supply and costs will increase. • Rebuilding scams may be common. • Availability of rental housing may be limited due to damage and high demand. This porch on a woodframe house failed during the 1989 magnitude 6.9 Loma Prieta earthquake. The “red tag” indicates that this home is unsafe and must not be entered or occupied. (USGS photo) Can you live without the services you rely on? • Water may be in short supply. • Natural gas and electric power may be out for days or weeks. • Garbage and sewage services may be interrupted. How Will the American Red Cross Help? • Businesses may sustain damage and disruption—many small businesses require a long time to reopen or do not survive disasters. After an earthquake, the American Red Cross will help in the following ways: • Opening and operating emergency shelters. • Providing food at shelters and feeding locations and through mobile distribution. • Obtaining and delivering other needed items such as water, baby supplies, and blankets. • Assisting with the immediate mental-health needs of those affected. • Providing for basic health needs at shelters and other locations. • Helping with initial recovery through casework and referrals to other agencies and partners. • Providing blood and blood products. • Your income may be affected—payroll checks or direct deposits may be delayed. For more information go to: http://www.redcross.org/services/disaster/ • Telephone, Internet, cell phone, and wireless communications may be overloaded or unavailable. • Mail service may be disrupted or delayed. • Gasoline may be in short supply, and rationing may be necessary. • Bank operations may be disrupted, limiting access to cash, ATMs, or online banking. Where will you get your water, food, medicines, and gasoline after an earth- • Grocery, drug, and other retail stores may be closed or unable to restock shelves. quake? (USGS photo) How will your job be affected? • Your workplace may become a temporary shelter for you or others. • Supplies and deliveries will be interrupted. This business in Santa Cruz, California, was nearly destroyed in the 1989 magnitude 6.9 Loma Prieta earthquake (USGS photo). 15 Why Should I Prepare? Your Financial Situation Could Be Affected by a Quake… A id may not be immediately available following a major disaster. Without proper planning, the financial impact of an earth
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