8.1 what is an earthquake? how many stories was this building originally? what happened to the other...
TRANSCRIPT
![Page 1: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/1.jpg)
8.1 What Is an Earthquake?
• How many stories was this building originally?• What happened to the other stories?
![Page 2: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/2.jpg)
Earthquakes
8.1 What Is an Earthquake?
• Focus is the point within Earth where the earthquake starts.
• Epicenter is the location on the surface directly above the focus.
An earthquake is the vibration of Earth produced by the rapid release of energy
Focus and Epicenter
• Faults are fractures in Earth where movement has occurred.
Faults
![Page 3: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/3.jpg)
Focus, Epicenter, and Fault
![Page 4: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/4.jpg)
1906 San Francisco Earthquake
Above is a seismogram recorded in Gottingen, Germany 5,600 miles away!
![Page 5: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/5.jpg)
1906 San Fran Earthquake
![Page 6: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/6.jpg)
![Page 7: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/7.jpg)
![Page 8: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/8.jpg)
![Page 9: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/9.jpg)
![Page 10: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/10.jpg)
![Page 11: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/11.jpg)
![Page 12: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/12.jpg)
![Page 13: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/13.jpg)
![Page 14: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/14.jpg)
![Page 15: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/15.jpg)
![Page 16: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/16.jpg)
Facts & Figures• San Diego, California, and
Santa Barbara, California, are on opposite sides of the San Andreas fault. They are currently approximately 562 km apart. The plates on either side of the San Andreas fault move at about the same rate as your fingernails grow, or about 45 mm/yr. At this rate, San Diego will reach Santa Barbara’s current location in approximately 10 million years!
![Page 17: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/17.jpg)
Earthquake Belts
![Page 18: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/18.jpg)
Cause of Earthquakes
8.1 What Is an Earthquake?
Elastic Rebound Hypothesis• Most earthquakes are produced by the rapid
release of elastic energy stored in rock that has been subjected to great forces.
• When the strength of the rock is exceeded, it suddenly breaks, causing the vibrations of an earthquake.
![Page 19: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/19.jpg)
Elastic Rebound Hypothesis
![Page 20: 8.1 What Is an Earthquake? How many stories was this building originally? What happened to the other stories?](https://reader036.vdocument.in/reader036/viewer/2022062804/56649dbf5503460f94ab273f/html5/thumbnails/20.jpg)
Cause of Earthquakes
8.1 What Is an Earthquake?
• An aftershock is a small earthquake that follows the main earthquake.
• A foreshock is a small earthquake that often precedes a major earthquake.
- Earthquake Videos- Japan 3-11-11 8.9 Earthquake
Aftershocks and Foreshocks