The New Madrid Earthquakes: Causes and Impact

The video explores the early 19th-century United States, focusing on the Louisiana Purchase and the New Madrid earthquakes of 1811-1812. It details the seismic events' impact on the region, including geological changes like Real Foot Lake and sand blows. The New Madrid seismic zone is analyzed, highlighting its unique characteristics and potential future risks. The importance of preparedness for potential earthquakes in the central US is emphasized.

What significant land acquisition doubled the size of the United States in 1803?

• The Oregon Trail

• The Alaska Purchase

• The Louisiana Purchase

• The Gadsden Purchase

Which river was a major lifeline for early settlers in the central United States?

• The Missouri River

• The Colorado River

• The Ohio River

• The Mississippi River

What was the population of New Madrid around the early 19th century?

• About 50 people

• About 200 people

• About 500 people

• About 1000 people

Which city was already almost 100 years old by the early 19th century?

• Memphis

• St. Louis

• New Orleans

• Nashville

What natural disaster struck the New Madrid area in December 1811?

• An earthquake

• A flood

• A tornado

• A hurricane

What lake was formed as a result of the 1811-1812 earthquakes?

• Lake Pontchartrain

• Reelfoot Lake

• Lake Michigan

• Lake Erie

Tags

NGSS.HS-ESS2-2

What phenomenon occurs when water-saturated sand is forced to the surface during an earthquake?

• Tsunami

• Sand blow

• Avalanche

• Landslide

Tags

NGSS.HS-ESS2-5

How often have large seismic events historically occurred in the central US?

• Every 500 years

• Every 1000 years

• Every 100 years

• Every 200 years

What is the estimated probability of a repeat of the New Madrid earthquakes in the next 50 years?

• 7-10%

• 25-30%

• 1-2%

• 15-20%

Tags

NGSS.HS-ESS1-5

What is the key to surviving any disaster, according to the video?

• Relying on first responders

• Being prepared

• Staying indoors

• Moving to a safer location

Tags

NGSS.HS-ETS1-1

NGSS.HS-ETS1-3