Geohazards Lesson

Which should be done after earthquake?

• Be prepared for aftershocks
• Drop, cover, and hold
• Move to an open area
• Familiarize yourself with the exit routes.

Landslide may be triggered by rain or ground shaking due to earthquakes.

• TRUE
• FALSE

A process where particles of loosely consolidated and water-saturated deposits of fine sand are re-arranged in more compact state. This may cause houses and buildings to subside or tilt.

• ground rupture
• landslide
• flooding
• liquefaction

This volcanic hazard is characterized as corrosive, hard, conducts electricity when wet, and never dissolve in water.

• lahar
• turbulent ash cloud
• ash fall
• basal flow

What to do during volcanic eruption?

• Bring your animals into closed areas/ shelters
• stay tuned-in to news updates
• cover your nose with wet cloth to protect it from ashes
• stay away from damaged powerlines

This hazard is caused by the chemical dissolution process in sandstone or chemical dissolution of carbonate rocks that causes erosion of the soil beneath the ground.

• sinkhole
• liquefaction
• land subsidence
• ground rupture

Which is not a sign of an incoming local tsunami?

• Earthquake that is strong enough to be felt.
• Sudden drop or rise of sea water.
• Roaring sound of incoming waves.
• Bulging ground appears.

Which is a sign of an impending landslide?

• Utility posts, trees, gates and walls of buildings tilt.
• Utility lines underground breaks
• Bulging ground appears.
• all of these.

Which volcanic hazard is indirectly associated with eruption?

• ash fall
• lahar
• volcanic gases
• Pyroclastic flow

Which is not a sign of impending volcanic eruption?

• Increase in the temperature of hot springs, craters, and well
• noticeable variation in the chemical content of springs, crater lakes within the vicinity of the volcano
• continuous raining
• localized landslides