Indonesian Earthquakes

The video discusses recent earthquakes in Southeast Asia, comparing them to the 2004 disaster. It explains the differences in magnitude and geophysics, highlighting why the recent quakes did not cause a tsunami. The video also covers the improvements in tsunami alert systems and evacuation procedures since 2004, emphasizing the importance of preparedness.

What was the magnitude of the first earthquake mentioned in the transcript?

• 8.2

• 7.5

• 8.6

• 9.1

How does the earthquake magnitude scale work?

• It is a logarithmic scale based on the amplitude of the waves.

• It is a scale based on the depth of the earthquake.

• It is a scale based on the number of aftershocks.

• It is a linear scale based on the duration of the quake.

Why did the 2004 earthquake cause a tsunami while the recent one did not?

• The recent earthquake was not strong enough.

• The recent earthquake occurred in a different region.

• The recent earthquake occurred along a strike-slip fault, not a subduction fault.

• The recent earthquake was too deep to cause a tsunami.

What type of fault was involved in the recent earthquake?

• Normal fault

• Thrust fault

• Reverse fault

• Strike-slip fault

What improvements have been made since the 2004 earthquake to prevent similar disasters?

• Building higher sea walls

• Increasing the number of seismographs

• Installing wave-detecting buoys and improving evacuation protocols

• Relocating coastal towns