Earthquake & its impacts

Question 1

How are earthquakes formed and how do they relate to plate tectonics (e.g. focal depth)?

Answer 1

EARTHQUAKES are formed by SUDDEN MOVEMENT along Earth’s FAULTS. It can create FRACTURES in plate tectonic BOUNDARIES.

Question 2

REMEMBER P-S-S

Describe the different types of seismic waves and their properties.

Answer 2

P WAVES: Called BODY WAVES. ONLY travel through LIQUIDS AND GASES.
S WAVES: Move in Z DIRECTIONS.
SURFACE WAVES: Generated CLOSEST TO EARTH’S SURFACE and SLOWEST waves.

Question 3

How are earthquake measured? (Mercalli, Ritcher, and Moment magnitude scale).

Answer 3

MERCALLI: PEOPLE’S RATING on how shaken they were by the earthquakes.
RITCHER: Made for CALIFORNIAN EARTHQUAKES.

Question 4

Describe the impacts that earthquake can bring (tsunami, liquefaction, etc.).

Answer 4

Can cause TSUNAMI which is WATER-SATURATED SEDIMENT that SLUMPS and FLOWS DOWN.