Epicenter and Focus, Intensity and Magnitude

The place where the fault begins to slip is called the______________.

• Focus

• Epicenter

• Magnitude

• Intensity

Which statement is NOT true of Intensity of an earthquake?

• Intensity is what humans see and feel.

• Intensity scale in number is written in Roman Numeral.

• Intensity is the amount of energy released by an earthquake.

• Intensity is determined by PHIVOLCS using the Earthquake Intensity Scale (PEIS)

What is being measured by the amount of energy released during an earthquake?

• Focus

• Magnitude

• Intensity

• Epicenter

In the Philippines, the intensity of an earthquake is determined using the __________ Earthquake Intensity Scale (PEIS).

• PAG-ASA

• BFAR

• PHIVOLCS

• DRRMC

What level of intensity when practically all man-made structures are destroyed. Massive landslides and liquefaction, large scale subsidence and uplift of land forms and many ground fissures are observed. Changes in river courses and destructive stiches in large lakes occur. Many trees are toppled, broken and uprooted?

• Intensity I

• Intensity III

• Intensity VII

• Intensity X

The PHIVOLCS Earthquake Intensity Scale (PEIS) is describing earthquake Intensity Scale V as?

• Weak

• Strong

• Very Strong

• Devastating

The place where the earthquake starts is____________________.

• Trace of Fault

• Earth's Crust

• Epicenter

• Focus

• Fault Plane

The focus is underground, along the _____________________.

• Trace of Fault

• Earth's Crust

• Epicenter

• Focus

• Fault Plane

The spot on the surface of the Earth that is directly above the focus is called the __________________.

• Trace of Fault

• Earth's Crust

• Epicenter

• Focus

• Fault Plane

The intersection of a fault with the Earth’s surface __________________________.

• Trace of Fault

• Earth's Crust

• Epicenter

• Focus

• Fault Plane