Podcast
Questions and Answers
What is the main cause of an earthquake?
What is the main cause of an earthquake?
- Friction between underground rocks
- Volcanic activity near the Earth's surface
- Elastic rebound of the Earth's lithosphere
- Sudden movement of tectonic plates along a fault (correct)
Which type of fault experiences vertical motion where one block moves upwards relative to the other?
Which type of fault experiences vertical motion where one block moves upwards relative to the other?
- Normal fault
- Strike-slip fault
- Thrust or Reverse fault (correct)
- Tensional fault
What type of stress is generated by rock pulling apart from each other?
What type of stress is generated by rock pulling apart from each other?
- Compressional stress
- Shear stress
- Elastic stress
- Tensional stress (correct)
Which type of earthquake is triggered by nearby volcanic activity?
Which type of earthquake is triggered by nearby volcanic activity?
What causes the rocks to crack and increase space during the elastic build-up stage of an earthquake?
What causes the rocks to crack and increase space during the elastic build-up stage of an earthquake?
Which seismic wave type causes elliptical shaking of the Earth and gets weaker with depth?
Which seismic wave type causes elliptical shaking of the Earth and gets weaker with depth?
What is the focus of an earthquake?
What is the focus of an earthquake?
Which belt accounts for more than 81% of the earthquakes in the world?
Which belt accounts for more than 81% of the earthquakes in the world?
What type of waves are P-waves?
What type of waves are P-waves?
What is the name for an instrument that records ground-shaking activity caused by earthquakes on the Earth's surface?
What is the name for an instrument that records ground-shaking activity caused by earthquakes on the Earth's surface?
What causes a shift in the rocks of Earth's crust, resulting in minor earthquakes?
What causes a shift in the rocks of Earth's crust, resulting in minor earthquakes?
What are seismic waves that travel through the Earth's interior and not along its surface called?
What are seismic waves that travel through the Earth's interior and not along its surface called?
What is the main theory of plate tectonics?
What is the main theory of plate tectonics?
What is the name given to the mobile earth's crust pieces?
What is the name given to the mobile earth's crust pieces?
What was the purpose of the Deep Sea Drilling Project (DSDP)?
What was the purpose of the Deep Sea Drilling Project (DSDP)?
Which decade introduced the Deep Sea Drilling Project (DSDP)?
Which decade introduced the Deep Sea Drilling Project (DSDP)?
What type of vessel was used for the Deep Sea Drilling Project (DSDP)?
What type of vessel was used for the Deep Sea Drilling Project (DSDP)?
What did the Deep Sea Drilling Project (DSDP) drill core samples from?
What did the Deep Sea Drilling Project (DSDP) drill core samples from?
What is seafloor spreading?
What is seafloor spreading?
What evidence from the samples taken from the Mid-Atlantic Ridge supported the seafloor spreading theory?
What evidence from the samples taken from the Mid-Atlantic Ridge supported the seafloor spreading theory?
What drives the motion of tectonic plates?
What drives the motion of tectonic plates?
Where do most earthquakes occur?
Where do most earthquakes occur?
What are tsunamis and how are they related to earthquakes?
What are tsunamis and how are they related to earthquakes?
What is the hypocenter of an earthquake?
What is the hypocenter of an earthquake?
What type of seismic waves cause the most damage during an earthquake?
What type of seismic waves cause the most damage during an earthquake?
What is the primary reason scientists are unable to predict when earthquakes will occur?
What is the primary reason scientists are unable to predict when earthquakes will occur?
Which earthquake measurement scale is based on seismic movement rather than wave amplitude?
Which earthquake measurement scale is based on seismic movement rather than wave amplitude?
What is the primary cause of earthquakes?
What is the primary cause of earthquakes?
What is the main difference between foreshocks and aftershocks?
What is the main difference between foreshocks and aftershocks?
What type of seismic waves move along the surface in a snake-like motion?
What type of seismic waves move along the surface in a snake-like motion?
What is the main factor that determines the classification of a quake as a mainshock, foreshock, or aftershock?
What is the main factor that determines the classification of a quake as a mainshock, foreshock, or aftershock?
What is the primary cause of aftershocks according to the text?
What is the primary cause of aftershocks according to the text?
How long can aftershocks last after a mainshock takes place?
How long can aftershocks last after a mainshock takes place?
What does the Richter scale measure?
What does the Richter scale measure?
Who invented the Richter scale?
Who invented the Richter scale?
What does the Richter scale range measure earthquakes from?
What does the Richter scale range measure earthquakes from?
What tool is used to detect and record earthquakes?
What tool is used to detect and record earthquakes?
What does the accuracy of the Richter scale depend on?
What does the accuracy of the Richter scale depend on?
Why is the measurement of energy released underestimated when using the Richter scale for higher magnitude earthquakes?
Why is the measurement of energy released underestimated when using the Richter scale for higher magnitude earthquakes?
What does a logarithmic increase in earthquake magnitude on the Richter scale result in terms of energy intensity?
What does a logarithmic increase in earthquake magnitude on the Richter scale result in terms of energy intensity?
