Vocabulary
This is the number of times an event happens in a specific amount of time.
What is frequency?
This is molten rock below Earth’s surface.
What is magma?
This state has a very low earthquake hazard.
What is Florida?
These waves are the first to arrive at a recording station.
What are primary waves (P-waves)?
This is the best way to prevent damage from a volcano.
What is avoiding building near an active volcano?
This describes the strength or the intensity of an event, represented by a numerical scale.
What is magnitude?
This is the most common type of volcanic eruption.
What is a nonexplosive eruption?
In this boundary, plates slide past each other.
What is a transform boundary?
These types of waves travel through Earth’s interior.
What are body waves?
This is an example of a safety-critical structure.
What is a bridge or a hospital?
These are smaller events that often lead to a final event.
What are precursor events?
Most volcanoes are located in this place.
What is the seafloor of the ocean?
This instrument is used to record the timing, strength, and vibrations of an earthquake.
What is a seismograph?
This is the reason that surface waves are the most destructive.
What is that they are the largest?
Scientists discovered that it was better to do this than to bolt down structures during an earthquake.
What is to let them rock?
This means to reduce the impact of an event.
What is mitigate?
This is a place where magma rises through the crust (away from plate boundaries).
What is a hotspot?
Earthquakes commonly occur at these two types of plate boundaries.
What are transform and convergent plate boundaries?
These surface waves move side to side.
What are horizontal waves?
Engineers consider these two things when designing for earthquakes.
What are hazard risk and structural performance?
This is an event that occurs naturally and can have a negative impact on people.
What is a natural hazard?
These are the 3 precursor events for a volcanic eruption.
What are small earthquakes under the volcano, the release of volcanic gases, and changes in the volcano's shape?
This is the cause of earthquakes.
What is the sudden movement of rock beneath Earth's surface?
These waves only travel through solids.
What are secondary waves (S-waves)?
This is the reason that scientists study precursor events.
What is to predict eruptions in order to keep people safe?