Earthquakes. What causes Earthquakes? Earthquakes are sudden movements or vibrations in the earth’s crust. They are caused by faulting and folding activity.

Slides:

Advertisements

Similar presentations

Question: Explain how the study of plate tectonics helps us to understand the occurrence of earthquakes.

Advertisements

Faults and Earthquakes

Real- Time Earthquake Data

Chapter 10 Objectives 1. Discuss the elastic rebound theory. 2. Explain why earthquakes generally occur at plate boundaries. 3. Compare the 3 types of.

Earthquakes and Tectonics Vocab Waves Boundaries General Info Random

Earthquakes A Whole Lot of shakin’ going on!. What are Earthquakes and where do they occur? Seismology is the study of earthquakes. Seismology is the.

 By the end of this unit, you should be able to:  Discuss stress and strain and their roles in earthquakes  Know the differences between elastic and.

Do Now: How can or does a volcanic eruption or earthquake occur? What forces on this planet are responsible for them? Explain your answer in complete sentences.

Chapter 5 Lesson 2 The Moving Crust

Earthquaaaaakes… - a sudden vibration or trembling in the Earth.

CHAPTER 7 EARTHQUAKES. 7.1 Notes What are earthquakes? earthquakes - movements or shaking of the ground when rock (plates) move suddenly and release energy.

EARTHQUAKES. EQ facts  Largest EQ recorded in the US 9.2  Largest in world 9.5  Average rate of motion across the San Andreas Fault is 2 in./yr. (3.

Real- Time Earthquake Data

Earthquakes Sudden movement of surface when accumulated strain along opposing sides of a fault is suddenly released. Rock stretches and snaps.

 A vibration of the Earth produced by a rapid release of energy  Often occur along faults – breaks in the Earths crust and mantle (plate boundaries)

 By the end of this unit, you should be able to:  Discuss stress and strain and their roles in earthquakes  Identify and describe the 3 types of faults.

Earthquakes. What is an Earthquake? Earthquake—the vibration of Earth produced by the rapid release of energy – Most often caused by slippage along a.

Earthquakes Chapter 6.1. Earthquakes & Plate Tectonics 1. Earthquakes are vibrations of the earth’s crust. a. Earthquakes occur when rocks under stress.

 Ch. 8 Sct. 1.  When rocks strain and potential energy builds up over time.  When the potential energy is released because the rock breaks, vibrations.

Earthquakes Vibrations of the earths crust Occur when rocks shift suddenly under a fault When friction prevents rocks from moving the fault is said to.

Earthquakes An earthquake is the shaking or trembling of the earth caused by the _Sudden_ movement of the earth’s crust. They usually occur where rocks.

STRESS – The amount of force exerted on a material.

Earthquake Vocabulary

Earth Science Mr. Barry.  Focus : the point where an earthquake originates  Epicenter : the point on Earth’s surface directly above the focus  Fault.

Causes of earthquakes An earthquake is defined as the shaking of the earth’s crust Can be large or small Earthquakes occur when energy is suddenly released.

EARTHQUAKES. INTRODUCTION TO EARTHQUAKES Earthquake = a vibration of the Earth produced by the release of energy. Seismology is the study of earthquakes.

Rocks Move along Faults

Internal Forces Shaping the Earth. Plate Tectonics The continents are on a slow ride. This is because they’re riding on the tectonic plates. The tectonic.

Earthquakes A sudden shaking of earth as rocks break along a fault or plate boundary A sudden shaking of earth as rocks break along a fault or plate boundary.

Chapter 19: Earthquakes. What are Earthquakes? Natural vibrations of the ground caused by movement in fractures in Earth’s crust or sometimes volcanic.

Geophysics! Waves in Nature. Earth’s Structure Earth’s Layers Inner Core: Solid, Mainly Iron and Nickel ~4500 °C Outer Core: Liquid Mainly Iron and Nickel.

Earthquakes. Causes of Earthquakes An earthquake is a shaking of Earth’s crust caused by a release of energy Mostly caused by the strain that builds.

EARTHQUAKES. Rocks move along faults…  A fault is a fracture or break in the Earth’s lithosphere where blocks of rock move past each other.  Along some.

Earthquakes Cornell Notes page 117.

Warm Up What do you think caused the ground to move as it did here?

Earthquakes Cornell Notes page 121.

Earthquake Notes.

Geology Notes Part 8 1.

Lithosphere-Earthquakes Unit

Plate Tectonics.

Earthquakes & Plate Tectonics

Essential Question: How does Earth's composition change the landscape

Earthquakes and More.

EARTHQUAKES! Part 3.

Chapter 12: Earthquakes.

Earthquakes Write on the RIGHT side.

What is the Great Shake Out?

Do First Questions: What mechanical layer of the Earth are plates made of? What mechanical layer of the Earth is moving causing the plates to move?

UNIT 4 The theory of plate tectonics explains Earth’s geological processes

Revision Year 3 Test 2 Semester A

Earthquakes! OBJECTIVES Differentiate between Focus & Epicenter

Do First Questions: What mechanical layer of the Earth are plates made of? What mechanical layer of the Earth is moving causing the plates to move?

Earthquakes Vocab.

A numerical scale used to measure the magnitude or energy released

Ch. 13 Volcanoes Volcano: A vent or fissure in Earth’s surface through which magma and gases are expelled. Often volcanoes look like mountains.

Earthquakes and Plate Tectonics

Chapter 10 Section 1 Notes.

Earthquakes Cornell Notes page 121.

Name: _____________________ Date:_____________ Block: ____

Presentation transcript:

Earthquakes

What causes Earthquakes? Earthquakes are sudden movements or vibrations in the earth’s crust. They are caused by faulting and folding activity along converging plate boundaries, as well as with landslides and volcanic activity.

Where do they occur? The most and the strongest are located along subduction and transform plate boundaries. Minor earthquakes can occur with volcanic activity or landslides.

/video/environment/environment- natural- disasters/earthquakes/earthquake- 101/ /video/environment/environment- natural- disasters/earthquakes/earthquake- 101/

Focus: The actual location in the earth where the earthquake occurs. Epicenter: the point on the surface directly above the earthquake focus.

Tectonic creep: rock masses sliding past each other at a fairly regular rate releasing strain energy. At times these rock masses lock up and strain builds up. They snap back into unstrained position. This releases energy outward as a seismic shock producing an earthquake. Example: San Andreas fault in California.

How are Earthquakes Measured? Mercali scale: the intensity of the earthquake is measured. This is a measure of the human experience, and the impact of the earthquake. Values are determined by observing the damage done to structures.

Richter Scale: The most common scale used to measure Earthquakes. It is based on intensity over a given distance. The largest Earthquakes record have measured just over 9.0 on the Richter scale.

Earthquakes over 9.0 on the Richter scale are very rare. Example: –2004 Indian Ocean earthquake of magnitude 9.3 (caused a devastating tsunami) –1960 Chilean earthquake of a magnitude of 9.5.

08/12/the-indian-ocean-earthquake- of-2004-will-history-repeat-itself/ 08/12/the-indian-ocean-earthquake- of-2004-will-history-repeat-itself/

A megathrust earthquake is an earthquake that can exceed 9.0 on the Richter scale. These generally occur where one plate subducts (slips below) another plate. Most occur in the Pacific or Indian Oceans, and because of the fact that they deform the ocean floor, tsunamis are usually associated with them.

Secondary Effects of Earthquakes There can be several secondary effects of earthquakes: –Tsunamis –fire and gas lines damaged or broken –flooding, –landslides, –famine / disease, –land altered (ex: shoreline raised 30 feet in Alaska, 1964).

Earthquakes can cause a lot of damage and deaths in a matter of seconds. Examples: –China 1976: whole city destroyed, deaths around 600,000 –China 1556: 830,000 people killed

Questions Explain how Earthquakes are measured using Seismometers. Read the “Tragedy in Turkey” on page 56/57 in your text book and answer questions 1, 2, and 3. Answer question 8 and 13 on page 61.