How do Earthquakes Travel?

Slides:

Advertisements

Similar presentations

Friday, March 23 nd 1 Attendance 2 Go over Review Sheet Test Pass Back papers.

Advertisements

Bell Work 12/5/14 1. How do you get a spaghetti noodle to bend and not break? 2. How do you break a spaghetti noodle? 3. How can you apply this concept.

Locating the Epicenter of an Earthquake

Locating the Epicenter of an Earthquake

States & Capitals of the West Review. Colorado (Denver)

 Waves of energy that travel through the earth after rock has been elastically deformed 1. The crust layer is stressed and begins to deform 2. If the.

Answer the following questions.

Start here There are three seismic waves Primary P-Waves These waves move in a compress and expand motion They are the first to arrive to the epicenter.

Earthquakes How and Where Earthquakes Occur. Is there such thing as “earthquake weather?” Absolutely NOT!!! Geologists believe that there is no connection.

Earthquakes  What they are  Where they occur  How fast they travel  How to locate their centers  Their strength.

What is an Earthquake? Movement of the ground that occurs when rock inside the Earth pass their elastic limit, break suddenly, and experience elastic rebound.

EARTHQUAKES 2007 Japan quake.

Chapter 12: Earthquakes. Where do earthquakes tend to occur? Earthquakes can occur anywhere, but they tend to occur on and near tectonic plate boundaries.

1 2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Earthquakes Shake Rattle Roll Lets.

EaRtHqUaKeS!!!.

Chapter 8 Earthquakes Northridge, CA San Francisco-1989.

Earthquakes. What is an earthquake? Used to describe the sudden slip on a fault, and the resulting ground shaking and radiated seismic energy caused by.

 Earthquakes are caused by a process called faulting. Faulting is a process when tectonic plates covering the earth rub together and create pressure.

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

Earth Science 8.1 Earthquakes Earthquakes.  Each year more than 30,000 earthquakes happen worldwide. Most are minor and do very little damage.  Only.

Earthquakes. By: Laura Barjarow Chapter 12.. Earthquakes A movement or trembling of the ground that is caused by a sudden release of energy when rocks.

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

SEISMIC WAVE BASICS.

Earthquakes. What is an earthquake? Used to describe both sudden slip on a fault, and the resulting ground shaking and radiated seismic energy caused.

Earthquakes Part 2 Remember- earthquakes usually occur along faults in the earth’s lithosphere. (San Andreas Fault) - Normal Fault - Reverse Fault - Strike.

Do Now Describe the last earthquake you can remember. (location, strength, time of day, how it felt, etc.) Where do earthquakes occur? Why do earthquakes.

Chapter 12 Earthquakes.

7.1 What Are Earthquakes?.

CHAPTER 8 EARTHQUAKES. EARTHQUAKES Earthquakes result from sudden motions along breaks in Earth’s crust and can affect landforms and societies. An entire.

Warmup 11/4/15 If you were a scientist, what would you do or look for to try and find out where the center of the earthquake was? Objective Tonight’s Homework.

Earthquake Let’s shake, rattle and roll Earthquake Basics Earthquake – shaking of Earth’s crust caused by the sudden release of energy Energy build over.

Finding the Epicenter …I hope you really like graphs!

Anthony Carlson GEOGRGHY 1820 APPLIED GIS 1. Here is a map I made showing the Epicenters in Utah between You can see the dot groups in Utah.

Earthquake Introduction

Earthquakes. What are earthquakes? The word earthquake means exactly what it says. An earthquake is when the ground shakes as a result of energy being.

1. What do seismologists use to determine when an earthquake started? A seismogram 2. How is the intensity of an earthquake determined? By the amount.

EARTHQUAKES. Earthquake Causes The bending and breaking of wooden craft sticks are similar to how rocks bend and break When a force is first applied to.

Chapter 8.1/8.2  Earthquake – a vibration of the Earth produced by a rapid release of energy.  Most often caused by slippage along a TRANSFORM FAULT.

 Energy travels as seismic waves which are vibrations caused by earthquakes.  All earthquakes start beneath the earth’s surface.

Chapter 5 Notes. Types of Stress ● Tension ● Pulls on the crust, stretching it thin ● Occurs when plates move away from one another ● Compression ● Rock.

EARTHQUAKES! INTRO:

Topic: What Causes Earthquakes? PSSA: A / S8.D.1.1.

What is an Earthquake? Goal 

What are earthquakes?.

How do we find the distance to the epicenter from a station?

Chapter 8 Earthquakes.

ANALYZING SEISMIC WAVES

Locating the Epicenter of an Earthquake

Earthquakes California Standards 3.a., b., & c.

Small Scale Crustal Change: Deformation of Earth’s Crust

Earthquakes!!!!!!!!!

Earthquakes Chapter 8.1/8.2.

Locating the Epicenter of an Earthquake

Earthquakes Chapter 8.1/8.2.

There are more than 30,000 earthquakes worldwide each year!

SEISMIC WAVE BASICS.

Earthquakes Chapter 8.1/8.2.

Earthquakes Chapter 8.1/8.2

Geology Constructive and Destructive Forces at Work.

When does the P wave arrive? 08:08:00

Locating the Epicenter of an Earthquake

Do Now: According to the seismogram below, What time did the P wave arrive?

Chapter 8 Earthquakes: Bell Ringer-

EARTHQUAKES Chapter 16 pg. 426.

Earthquakes Chapter 8.1/8.2.

Presentation transcript:

How do Earthquakes Travel?

With seismographs

Seismic waves are measured by seismographs We have seismographs in an amazing number of places in the world. They can sense even the smallest tremor.

Seismographs draw lines side to side to show a tremor The paper that comes out of a seismograph is called a seismogram. Seismograph Seismogram

A seismogram looks like this

How do we locate the How do we figure out where an earthquake happened? We have seismographs in cities all over the country. A seismograph can tell how far away an Earthquake occurs.

How do we locate the How do we figure out where an earthquake happened? If a seismograph in New Jersey detects an earthquake they can tell how far away it is. If this one measured a quake at 600 miles away – we would draw a circle with a diameter of 600 miles. 600 miles So what do we know now? Since we know that the quake occurred 600 miles from NJ – we know that the epicenter MUST be somewhere on the line.

Then we have to find out what two other seismograph’s say.

How do we locate the How do we figure out where an earthquake happened? If the seismographs in North Carolina say the quake was 200 miles away we would draw another circle with a 200 mile diameter. 600 miles 200 miles So what do we know now? We know that the epicenter of the quake has to be on both the 600 mile circle AND the 200 mile circle. That means the quake happened on one of two points.

So let’s ask one more machine – then we will know exactly where it was.

How do we locate the How do we figure out where an earthquake happened? If the seismographs in Indiana say the quake was 400 miles away we would draw another circle with a 400 mile diameter. 600 miles 200 miles So what do we know now? We know that the epicenter of the quake has to be on the 600 mile circle AND the 200 mile circle AND on the 400 mile circle That means the quake happened right here 400 miles

How do we locate the Where did this quake happen? The seismograph in Salt Lake City sensed an Earthquake 750 miles away. This is a circle with a diameter of 750 miles Salem Oregon Boise Idaho Denver Colorado Los Angeles California San Francisco California Salt Lake City Utah

How do we locate the Where did this quake happen? The seismograph in Los Angeles sensed an Earthquake 350 miles away. This is a circle with a diameter of 350 miles Salem Oregon Boise Idaho Denver Colorado Los Angeles California San Francisco California Salt Lake City Utah

How do we locate the Where did this quake happen? Finally the seismograph in Salem Oregon sensed and earthquake 600 miles away. Salem Oregon Boise Idaho Denver Colorado Los Angeles California San Francisco California Salt Lake City Utah So where was the Earthquake?

How do Seismographs work watch?v=c6XB5QLoPt0

So what makes the ground shake?

Rubber bands work with elastic rebound too… You can stretch and stretch and stretch – And as long as you keep the pressure on the band will stay long. But when the pressure lets go…. The rubber band SNAPS back to its original shape The SNAP is elastic rebound It’s what causes the earth to SNAP back into shape It’s the earthquake!

KT24&ebc=ANyPxKp_6PVldU2qBjyvzRZo8VYNS o1f9Qh4_RjohFWnKq8LxB9CBt---EvT9Ax- 3v1RBQNqtRREDT6lZ9pRw1Owj8n9ly_s_A

You push the ant down and it gets flattened out. But when you let go it snaps back to its original shape and it flies! That’s what elastic rebound is – the rock gets pushed on and it changes its shape but the second that the pressure lets up it SNAPS back to its original shape! Remember this game?