Tariq Edwards (Ms Rapoport & Mr Taylor) Period 7 Earth Science

What is the Epicenter?

The epicenter is the point on the earth's surface vertically above the hypocenter (or focus), point in the crust where a seismic rupture begins.

When does the Earthquake starts?

Earthquakes will occur when the tectonic plates that the crust of the earth sets on shift and bump into one another. The harder the bump the stronger the quake.

What is the San Andreas fault?

The San Andreas Fault is a major geological fault in California; runs from San Diego to San Francisco; the source of serious earthquakes.

How Earthquakes impact cities?

1. Fire may broke out from leaking gas pipe.

2.Water will be flooded because of damage of water line connection.

3. Over head electricity wire will be stripped off.

4. Glass panels and windows will be damaged and spread on road.

5. Damaged roads will block the movements.

How can we prepare for incoming Earthquakes?

  • Fasten shelves securely to walls, and place heavy objects on lower shelves.
  • Store breakable items in low, closed cabinets.
  • Hang items such as pictures and mirrors away from beds and anywhere people sit.
  • Brace hanging light fixtures.
  • Repair known defective electrical wiring and gas connections.
  • Strap your water heater to studs in the wall and bolt it to the floor.
  • Repair any large existing cracks in walls or foundations.
  • Store poisons such as pesticides and herbicides, as well as flammable liquids, on bottoms shelves of latched cabinets.
  • Identify safe places in each room (under sturdy furniture, against inside walls, away from glass).
  • Locate safe places outdoors (away from buildings, trees, electrical lines, and bridges).
  • Teach family members how to turn off gas, electricity, and water.
  • Teach children how to dial 911 in an emergency.
  • Have disaster supplies on hand (flashlight and extra batteries, battery operated radio, fist aid kit with manual, emergency food and drinking water, non electric can opener, cash, sturdy shoes).
  • Develop an emergency communications plan in case family members are separated.

What is the most destructive Earthquakes in history?

22 May 1960 – Chile

Magnitude 9.5

The world's most powerful earthquake left 4,485 people dead and injured and 2 million homeless after it struck southern Chile in 1960. The port of Puerto Saavedra was destroyed in the ensuing tsunami, which caused $550m worth of damage in Chile and killed a further 170 people as five-metre waves hit the coasts of Japan and the Philippines. A day later Volcán Puyehue in Chile's lake district spewed ash 6,000m into the air in an eruption that lasted for several weeks.

Crescent City flood

What do Earthquakes cause?

An earthquake can cause tsunami, landslides, mudslides, bigger earthquakes, "after shocks", significant damage to property and buildings, deaths and injuries to people and animals, floods, major disasters and emergency situations.

How do Earthquakes cause Erosion?

When an earthquake happens at a passive boundary there is friction that slide the two rough surfaces against each other, and the energy is finally released after this build up releases by itself. The plates must be stopped again by another rough part of the plate as it only moves a few Cm (Centimeters). The plate is eroded both my the passing and the hit when the plates stop again.

Do Earthquakes affect the weather?

Sadly, they do not affect the weather.

How Earthquakes are measured?

The strength, severity and intensity of earthquakes are usually measured and given a score. There are two scales used to measure earthquakes, the Mercalli Scale which measures the severity and the more popular Richer Scale, which measures the intensity. The Richer Scale measures earthquakes starting at 1 as the lowest and successive units being about 10 times stronger and severe that the previous.

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