Earthquakes
This type of wave can travel through both solids and liquids.
What is a primary wave?
This is made up of high, level areas made of many layers of thin, runny lava that errupts from long cracks in the ground.
What is Lava plateaus ?
This type of boundary occurs when tectonic plate slides past one another.
What is a transform boundary?
If magma is starting to build up it can cause a bulge in the dome of the volcano. The distance between the points A-B will increase. This type of sensor can measure and track these changes continuously..
What is GPS or Global Positioning System?
The most destructive natural disaster ever!
What is an asteriod/comet impact?
This is the slowest of all the waves, but causes the most structural damage.
What are surface waves?
These are tall, cone-shaped mountains in which layers of lava alternate with layers of ash.
What is composite volcanoes?
This type of boundary occurs when tectonic plates pull apart.
What is a divergent boundary?
This type of imaging can look for swelling and heating of the ground which are both indications of impending eruptions.
What is thermal imaging?
This chemical is released during volcanic eruptions. When it combines with water and air, it forms sulfuric acid, which is the main component of acid rain.
What is sulfur dioxide?
These volcanoes have quiet eruptions where lava flows gradually building a wide, gently sloping mountain.
What is a shield volcano?
There are three types of faults. This fault occurs when forces cause two blocks of rock to slide horizontally past each other in opposite directions.
What is strike-slip fault.
Which is best used to track the global movement of volcanic ash after an eruption?
A
ground truthing (information collected on location)
satellite photographs (images taken by satellites from space)
topographic maps (shows elevation, slope, features of the land)
weather balloons (collects data from the atmosphere such as temperature, wind speed, and humidity)
.
What is B- satellite photographs?
This is the point beneath Earth's surface where rock under stress breaks to cause an earthquake.
What is focus?
This is one of the most geologically active areas.
What is the Ring of Fire.
This type of fault occurs when a force pushes two block of rock together with the rock above the fault moving up.
What is the reverse fault?
A geologist checks her seismometer for activity after an earthquake that occurs on the other side of Earth. The instrument records P-waves, but not S-waves. Explains why S-waves were not recorded? .
S - waves can not travel through liquid?
The arrival time difference between the first P-wave and S-wave is called what?
What is lag time.
This forms when a huge hole is left from the collapse of a volcano.
What is a caldera?
What is the block of rock that lies above the fault termed and the block of rock that lies below the fault termed?
What is hanging wall and foot wall?
These measure the tilt of the ground in the same way as a carpenter uses a spirit level. They have been in use since 1912..
What is tiltmeters?
What is a string of islands created by volcanoes near boundaries where two oceanic plates collide and one subducts beneath the other.
What is island arc?