9 GALVANI

People were interviewed after an earthquake and were asked about the effect tremor to their properties, buildings and other infrastructures. Which method of earthquake measurement is determined in the situation?

• intensity

• magnitude

• location of the focus

• location of the active fault

PHIVOLCS a service institute in charge of the monitoring and is principally mandated to mitigate disasters that may arise from volcanic eruptions, earthquakes, tsunami, and other related geotectonic phenomena. What is the acronym PHIVOLCS stands for?

• A. Philippine Institute of Volcano and Seismology

• B. Philippine Institute of Volcanology and Seismology

• C. Philippine Institute of Volcanology and Seismologist

• D. Philippine Infrastructure of Volcanology and Seismology

What phenomenon is produced by earthquakes that originate from the ocean floor?

• A. aftershock

• B. earthquake

• C. storm surge

• D Tsunami

The focus of the earthquake is traced near your place. As you go away from the focus, what will happen to the intensity of the earthquake?

• A. It will increase

• B. It will decrease

• C. It will not be felt change

• D. It does not

Which of the following differentiate intensity from magnitude?

• A. Mercalli scale is to measure intensity while Richter scale is to magnitude.

• B. Intensity is written in Arabic Numbers while the magnitude is written in Roman Numerals.

• C. Intensity measures the actual shaking while magnitude measured the amount of energy released in an earthquake.

• D. Intensity uses a seismograph to record earthquakes while the magnitude is determined by the effect of shaking am

How do faults generate earthquakes?

• A. Magma and lava cause the ground to spread producing faults.

• B. Tectonic plates collide forming volcanoes causing earthquakes.

• C. Molten rock materials accumulate and go out along the fault producing earthquake.

• D. Energy from inside the Earth makes the ground move, once energy is released, a fault slips producing an earthquake.

West Valley Fault located from Bulacan to Cavite is considered an active fault. The following are true about active fault EXCEPT.

• A. Active faults are likely to become the source of an earthquake.

• B. One active fault in the Philippines is the Central Philippine Fault.

• C. Active faults are known to have recently generated earthquakes for the last 10 000 years.

• D. Active faults do not show signs of generated earthquakes within the last 10,000 years.

Which statement describes the epicenter of an earthquake?

• A. The point where the fault cracking originates.

• B. The point where the maximum ground shaking is recorded.

• C. The surface location is directly above the focus where the fault cracking originates.

• D. The point of most intense, structural damage associated with ground shaking.

What is the best thing to do during an earthquake?

• A. If indoor, go out of the house.

• B. If indoor, crawl under a sturdy table or furniture.

• C. Get inside the building and rescue injured people.

• D. Stay away from power lines, poles, walls, and other structures.

What is the best thing to do in the event of a tsunami alert?

• A. Wait for 30 minutes before to taking an action.

• B. Go to the beach and observe the water level.

• C. Seek protection in structures near the beach.

• D. If near the beach, move inland to a place with higher elevation.