Pacific Ring of Fire

Eric AngatTeacher

Convergent boundary - subduction and volcanoes

Transform boundary-San Andreas fault

New Madrid fault

Charleston fault (SC)

NC

Convergent boundary - subduction and volcanoes

Transform boundary-San Andreas fault

Missouri

Kentucky

ArkansasTennessee

New Madrid fault

The majority of the research shows that the plates move at the average rate of between approximately 0.60 cm/yr to 10 cm/yr. Some sources state that in the North Atlantic, the rate of movement is only about 1 cm (about 0.4 in) per year, while in the Pacific it amounts to more than 4 cm (almost 2 in) annually, while others say that plates, in general, travel from 5 to 10 cm/yr.

Warm colours show regions with the highest probability of strong shaking, which tend to be located near, or influenced by, major plate boundaries. Earthquake clustering in mid-continental areas such as New Madrid and Charleston is here interpreted to reflect continuing deformation sufficient to produce frequent large earthquakes.

1.What is pyroclastic flow?2.How did the pyroclastic flow kill

the group of scientists and press?

3.What is the Pacific Ring of Fire?4. Where are the volcanoes in the

Pacific Ocean located?

http://www.youtube.com/watch?v=Y7Z1cvXszac

1. What is pyroclastic flow? superheated volcanic dust and gases.2. How did the pyroclastic flow kill the group of scientists

and press? Their lungs were burned by the pyroclastic gases.3. What is the Pacific Ring of Fire? Active volcanoes that circle the Pacific Ocean.4. Where are the volcanoes in the Pacific Ocean located?The volcanoes occur along subduction zones around the Pacific ocean.

5. What is common along the Pacific Ring of Fire?

6. What causes the frequent earthquakes in the Pacific Ring of Fire?

7. Which areas in the United States are most prone to earthquakes? Why?

https://www.youtube.com/watch?v=jpqUu0PLkmM

https://www.youtube.com/watch?v=jpqUu0PLkmM

When Mount Vesuvius erupted cataclysmically in the summer of A.D. 79, the nearby Roman town of Pompeii was buried under several feet of ash and rock. The ruined city remained frozen in time until it was discovered by a surveying engineer in 1748.

divergent

divergentNo plate boundary

convergent

Transform or strike slip

convergentconvergent

Atlantic Ocean

Pacific Ocean

divergent

divergentNo plate boundary

convergent

Transform or strike slip

convergentconvergent

Atlantic Ocean

Pacific Ocean

Hot Spots Volcanoes

https://www.youtube.com/watch?v=AhSaE0omw9o

Mantle plumes are areas of hot, upwelling mantle. A hot spot develops above the plume. Magma generated by the hot spot rises through the rigid plates of the lithosphere and produces active volcanoes at the Earth's surface. As oceanic volcanoes move away from the hot spot, they cool and subside, producing older islands, atolls, and seamounts. As continental volcanoes move away from the hot spot, they cool, subside, and become extinct.

5. What is common along the Pacific Ring of Fire? Earthquake is most common in the Pacific Ring of Fire.6. What causes the frequent earthquakes in the

Pacific Ring of Fire? The Pacific plate is constantly shifting

and subducting beneath the continental plates.

7. Which areas in the United States are most prone to earthquakes? Why?

Alaska and the Pacific North-West

http://upload.wikimedia.org/wikipedia/commons/8/8a/Plates_tect2_en.s