GPS is Doing More 2 -Section: FEEL AN EARTHQUAKE

PARAG 5 . What is the main purpose of seismometers in assessing earthquakes?

• To measure the speed of GPS satellites

• To track geologic processes on slow scales

PARAG 7.

What is the unique series of ones and zeros transmitted by GPS satellites known as?

• The earthquake signal

• The code

PARAG 8

How has the rate at which GPS receivers update their location been improved?

• They can refresh themselves once a day

• They can refresh themselves 20 times a second or more

What did Diego Melgar and Gavin Hayes study in relation to earthquakes?

PARAG 9

• The rate of plate tectonics

• 12 large earthquakes

What is the purpose of incorporating GPS into the earthquake early warning system?

PARAG 10

• To track the movement of GPS satellites

• To detect ground shaking and warn far away towns

PARAG 6

Why were GPS initially thought to be useless in assessing earthquakes?

• they lacked extra information

• they lacked accuracy and speed

What information can GPS data provide to help assess earthquakes quickly?

PARAG 9

• Whether a quake will be damaging or destructive

• The speed of the San Andreas Fault

What is the significance of building out the GPS network in Chile?

PARAG 10

• To have more accurate information quickly

• To determine the speed of GPS receivers