Ch. 2Ch. 2Sec. 4 Sec. 4

Earthquake SafetyEarthquake Safety

earthquake risk

• Geologists determine earthquake risk by locating where faults are active & where past earthquakes have occurred.

How earthquakes cause damage

1. shaking • Triggers landslides or avalanches

• Damages bldgs.

• Depends on type of rock & soil

when earthquake’s violent when earthquake’s violent shaking suddenly turns loose, shaking suddenly turns loose, soft soil into liquid mudsoft soil into liquid mud

2. liquefaction2. liquefaction

• earthquake that occurs after larger

earthquake in same area

• may strike hours, days or months later

3.

4. tsunami

large wave created by water displaced by earthquakes on ocean floor

best way to protect yourself best way to protect yourself during an earthquakeduring an earthquake

•drop, cover & hold

When the shaking first starts...DROP to the floor.

Take COVER under a sturdy desk, table, or other furniture.

If there is nothing available to take cover under, crouch against an interior wall and protect your head and neck with your arms.

If seeking cover under a piece of furniture, HOLD on to it and be prepared to move with it during the quake.

STAY AWAY FROM DANGER SPOTS STAY AWAY FROM DANGER SPOTS NEAR WINDOWS, HANGING OBJECTS, NEAR WINDOWS, HANGING OBJECTS, MIRRORS, OR ANYTHING THAT MIRRORS, OR ANYTHING THAT MIGHT FALL OVER.MIGHT FALL OVER.

Ways to Make Buildings SaferWays to Make Buildings Safer

► Make new buildings stronger

& more flexible► Modify older buildings► Choose safe location to build► Build base-isolated buildings

base-isolated buildingbase-isolated building

• bldg. designed to reduce amt. of energy that reaches bldg. during earthquake

A base-isolated building rests on shock-absorbing rubber pads or springs.