2. The three types of earthquakes are:
a. Tectonic Earthquake - a sudden release of energy
in the earth's crust or upper mantle, usually
caused by movement along a fault plane or
by volcanic activity and resulting in the
generation of seismic waves which can be
destructive
b. Volcanic Earthquake - is an earthquake induced by the movement of magma.
c. Landslips Earthquake - caused by landslide.
3.The causes of earthquakes are:
a. Faulting or shifting of faults. b. Volcanic activity/ eruption
4. The focus is where exactly in the crust the earthquake is happening while the epicenter is the point on the surface right above the focus of the earthquake .
5. Fore shocks are earthquakes which precede larger earthquakes in the same location. Aftershocks are smaller earthquakes which occur in the same general area during the days to years following a larger event or "main shock", defined as within 1-2 fault lengths away and during the period of time before the background seismic level has resumed.
6. Earthquakes generate seismic waves which can be detected with a sensitive instrument called a seismograph.
7. Magnitude measures the energy released at the source of the earthquake. Magnitude is determined from measurements on seismographs. Intensity measures the strength of shaking produced by the earthquake at a certain location. Intensity is determined from effects on people, human structures, and the natural environment.
8. What to Do Before an Earthquake
- Make sure you have a fire extinguisher, first aid kit, a battery-powered radio, a flashlight, and extra batteries at home.
- Learn first aid.
- Learn how to turn off the gas, water, and electricity.
9. What to Do During an Earthquake
- Stay calm! If you're indoors, stay inside. If you're outside, stay outside.
- If you're indoors, stand against a wall near the center of the building, stand in a doorway, or crawl under heavy furniture (a desk or table). Stay away from windows and outside doors.
10. What to Do After an Earthquake
- Check yourself and others for injuries. Provide first aid for anyone who needs it.
- Check water, gas, and electric lines for damage. If any are damaged, shut off the valves. Check for the smell of gas. If you smell it, open all the windows and doors, leave immediately, and report it to the authorities (use someone else's phone).
