Where do earthquakes occur?. Plate Tectonics The Ring of Fire.
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Transcript of Where do earthquakes occur?. Plate Tectonics The Ring of Fire.
![Page 1: Where do earthquakes occur?. Plate Tectonics The Ring of Fire.](https://reader035.fdocuments.in/reader035/viewer/2022062423/56649ee75503460f94bf8636/html5/thumbnails/1.jpg)
Where do earthquakes occur?
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Plate Tectonics
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The Ring of Fire
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EarthquakesWhat instrument do we
use to measure earthquakes? What do the values
mean?
What scale do we use to report the magnitude of an
earthquake?
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Magnitude Average Annually
8 and higher 1 ¹
7 - 7.9 17 ²
6 - 6.9 134 ²
5 - 5.9 1319 ²
4 - 4.9 13,000
(estimated)
3 - 3.9 130,000
(estimated)
2 - 2.9 1,300,000
(estimated)
¹ Based on observations since 1900. ² Based on observations since 1990.
Earthquakes
How many Earthquakes (on average) occur on the Earth each
year?
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RecentEarthquake in Haiti
• January 12th 2010, Magnitude 7.0 on the Richter Scale!!
•Lot’s of BIG (<6.0) ‘aftershocks’
• Occurred 15 km below the surface of the Earth (why there?)
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Recent Earthquake in Haiti
What type of fault?
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Recent Earthquake in Haiti
230,000 Confirmed Deaths…
(6th deadliest earthquake)
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Recent
Earthquakes in Chile• February 27th 2010, Magnitude 8.8 on the Richter Scale!!
•Lot’s of BIG (<6.5) ‘aftershocks’
• Occurred 35 km below the surface of the Earth (why so deep?)
• ~500 people died
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SubductionWhere do we get earthquakes?Where do we get volcanoes?
CHILE
volcanoes
Where do we get earthquakes?Where do we get volcanoes?
Focus
Epicenter
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Hait vs. Chile Discussion
What are the main differences between the
Haiti and Chile Earthquakes?
Haiti
Chile
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Where was the LARGEST recorded Earthquake in the WORLD?
Earthquakes
• May 22nd, 1960 in CHILE!!! Magnitude 9.5Magnitude 9.5 on the Richter Scale!
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EarthquakesThe Earthquake in 1960 in CHILE was SO BIG that it
is thought to have caused a volcano to erupt!!
Cordon Calle volcano with an eruption cloud. The volcano, which was within 200 km (~124 miles)
of the earthquake epicenter, began to erupt two days after the earthquake.