The name of the location within Earth where earthquakes originate ...

[bobthebuilder]

The name of the location within Earth where earthquakes originate is the ___________________ _. Fill in the blank(s) with the appropriate word(s).

Question 2

An instrument that detects, records, and measures vibrations produced by an earthquake is called a(n)
  ___________________ _. Fill in the blank(s) with the appropriate word(s).

[macagn]

Answer to Question 1

focus, or hypocenter

Answer to Question 2

seismograph