e.g Earthquake anatomy Flashcards
(11 cards)
the point within the Earth along the geological faults where the earthquake originates.
Hypocenter (focus)
the point on Earth ‘s surface directly above the focus.
Epicenter
are produced when the hypocenter is located near the surface, from 0 to 70 km.
Are called crustal earthquakes as they exist in the earth’s crustal layer.
They occur randomly.
Are closer to the surface where rocks are stronger and could build up greater strain, these earthquakes are larger and more damaging compared to deep – focus earthquakes.
Shallow-Focus earthquakes
are produced when the hypocenter is located near the surface, from 0 to 70 km.
Are called crustal earthquakes as they exist in the earth’s crustal layer.
They occur randomly.
Are closer to the surface where rocks are stronger and could build up greater strain, these earthquakes are larger and more damaging compared to deep – focus earthquakes.
Shallow-Focus earthquakes
if it is intermediate, between 70-700 km.
Are known as intra plate earthquakes, as they are triggered off by collision between plates.
Occur between 20-30 years.
Deep-focus earthquakes
start to radiate from the hypocenter and subsequently form along the fault rupture.
seismic waves
The spot directly above the focus on the surface of the Earth is called the?
epicenter
The place where the fault begins to slip is called the _ _ _ _ _. It is where the first movement occurs.
focus
There are two ways how to measure an earthquake; the?
magnitude and intensity
A ____ is the measure of energy releases of the Earthquakes.
Magnitude of an earthquake is expressed in ____ letters.
Magnitude ; Arabic
____ is the description of how weak or strong the shaking is. It is generally higher near the epicenter.
_____ is expressed in __________ letters and this is what humans see and feel.
Intensity ; roman numeral
