Natural Hazards

Question 1

The processes that have shaped Earth continually act on or beneath the surface. Geologic hazards brought by earthquakes, earthquake-induced landslides, volcanic eruption, and tsunamis are due to the movement of plates and local concentrations of geologic heating. The geologic hazards cause great risk to both humans and humanmade structures.

Answer 1

Geological hazards

Question 2

Since ——, PHIVOLCS has recorded — destructive earthquakes in the Philippines.

Answer 2

1996, 12

Question 3

Magnitude: 7.7
Epicenter: near the town of Rizal, Nueva Ecija, northeast of Cabanatuan
Death count: approximately 2,412 people

Answer 3

The Great Luzon Earthquake. 1990

Question 4

Magnitude: 7.2
Epicenter: Sagbayan, Bohol Death count: 222

Answer 4

Bohol Earthquake, 2013

Question 5

The top 10 provinces that are at risk for earthquakes include:

Answer 5

1. Surigao Del Sur
2. La Union
3. Benguet
4. Pangasinan
5. Pampanga
6. Tarlac
7. Ifugao
8. Davao Oriental
9. Nueva Vizcaya
10. Nueva Ecija

Question 6

——— are a type of “mass wasting,” which denotes any down-slope movement of soil and rock under the direct influence of gravity.

Answer 6

Landslides

Question 7

sometimes cause tsunamis that damage coastal areas.

Answer 7

Submarine landslides

Question 8

The Philippines lies within the Pacific Ring of Fire. This describes the distribution of most volcanoes in the Philippines. (22 active)

Answer 8

Volcanic eruptions

Question 9

Most violent eruption in the 20th century The eruption produced high-speed avalanches of hot ash and gas, giant mudflows, and a cloud of volcanic ash hundreds of miles across.
Death count: 847 death toll due to roof collapse

Answer 9

Mount pinatubo eruption, 1991

Question 10

The top 10 provinces that are at risk for volcanic eruption include:

Answer 10

1. Camiguin
2. Sulu
3. Biliran
4. Albay
5. Bataan
6. Sorsogon
7. South Cotabato
8. Laguna
9. Camarines Sur
10. Batanes

Question 11

Process or phenomenon of atmospheric, hydrological or oceanographic nature that may cause loss of life, injury or other health impacts, property damage, loss of livelihoods and services, social and economic disruption, or environmental damage

Answer 11

Hydrometeorological Hazards

Question 12

is a seasonal change in the direction of the prevailing, or strongest, winds of a region.

Answer 12

Moonsoon

Question 13

southwest monsoon – June to October

Answer 13

Habagat

Question 14

northeast monsoon – November to March

Answer 14

Amihan

Question 15

localized storm accompanied by lightning and thunder

Answer 15

Thunderstorms

Question 16

Coastal area refers to the land and sea areas bordering the shoreline. It comprises the natural boundary between the land and ocean which may include the beach, dunes, mangroves, estuary, and lagoon.
The Philippines is particularly susceptible to coastal hazards. The hazards living near the coastlines include dangers of waves, tides, erosion, fold, and saltwater intrusion.

Answer 16

Marine and coatal hazards

Question 17

caused by wind and storms
Cause large impact around the coastline for the potential coastline erosion, flooding, and damages

Answer 17

Waves

Question 18

Result of gravitational attraction of the sun and moon on
the oceans, cause the frequent rise and fall of ocean levels

Answer 18

Tides

Question 19

The process of wave action, wave currents, and tidal currents wear away the land and remove sediments near the coastline.

Answer 19

Coatal erosion