Geoquiz2 Flashcards
1
Q
- It is the paper that record of earth vibration.
A
Seismogram
2
Q
- It is a seismometer with a recording device that
produces a permanent record of earth motion, usually in the form
of wiggly line drawn on a moving strip of paper.
A
Seismograph
3
Q
- What is the number of seismograph station needed to locate the origin of an earthquake?
A
3 stations
4
Q
- He is a Scottish geologist who
authored the The Dynamics of Faulting and
Dyke Formation with Application to Britain
(Edinburgh, 1942, 1951) and systematized our
knowledge of the geometry and stress fields of
various faults. He contended that the direction of
the maximum principal stress along normal
faults is ________.
A
Ernest Masson Anderson; vertical
5
Q
- What type of fault is the North Bohol
Fault (NBF)?
A
Reverse Fault with minor right- and leftlateral displacement
6
Q
- What is the main difference between fracture and fault?
A
A fault involve some type of slippage or movement, whereas fractures do not.
7
Q
- It is a type of force or stress that pushes on rocks from opposite directions which causes rocks to be shortened parallel to the stress applied.
A
Compression/Compressional stress
8
Q
- It is a type of force or stress that pulls rocks from opposite directions, resulting it to become stretched/lengthened.
A
Tension/Tensional stress
9
Q
- It is a type of force or stress that occurs when rocks are being pushed in an uneven manner, causing the rocks to be skewed such that different sides of a rock body slide or move in opposite directions.
A
Shear
10
Q
- The 16 July 1990 earthquake, magnitude ______, produced a 125 km-long ground rupture that stretches from Dingalan, Aurora to __________ as a result of strikeslip movements along the NW segment of the Philippine Fault Zone and its splay, the ______ Fault.
A
7; Kayapa, Nueva Vizcaya; Digdig
11
Q
- Seismic waves can be classified into two types, namely _______ and __________.
A
Body waves; Surface waves
12
Q
- Rayleigh waves are also known as?
A
Ground roll
13
Q
- Two Types of Earthquake:
A
Volcanic and Tectonic
14
Q
- In areas where tensional forces dominate the friction along faults is naturally low, allowing them to slip in an almost continuous process known as ___________.
A
Fault creep
15
Q
- What are subduction zone earthquakes?
A
These are earthquakes which form when an oceanic plate is overridden by another plate.
