Answer:Here is the completed table of Geologic Disaster Preparedness: Geologic Event Harmful Effect/s What to Do Before What to Do During What to Do After | Geologic Event | Harmful Effect/s | What to Do Before | What to Do During | What to Do After || Earthquake | Ground shaking, building collapse, tsunamis, landslides | Secure heavy objects, prepare an emergency kit | Drop, cover, and hold on; stay away from windows | Check for injuries, inspect utilities, expect aftershocks || Landslide | Soil and debris flow, burying structures, blocking roads | Monitor weather reports, look for signs of ground movement | Evacuate immediately if landslide occurs, move to higher ground | Stay away from the slide area, check for injured or trapped people || Tsunami | Flooding, strong currents, coastal erosion | Move to higher ground, away from the coast | If caught in a tsunami, grab onto something that floats | Wait for official clearance before returning, watch out for debris || Volcanic Eruption | Ashfall, lava flows, pyroclastic flows, gas emissions | Know evacuation routes, prepare a supply kit, wear protective gear | Seek shelter indoors, protect yourself from ashfall | Stay indoors until advised it is safe, clear ash from roofs |Earthquake Ground shaking, building collapse, tsunamis, landslides Secure heavy objects, prepare an emergency kit Drop, cover, and hold on; stay away from windows Check for injuries, inspect utilities, expect aftershocks Landslide Soil and debris flow, burying structures, blocking roads Monitor weather reports, look for signs of ground movement Evacuate immediately if landslide occurs, move to higher ground Stay away from the slide area, check for injured or trapped people Tsunami Flooding, strong currents, coastal erosion Move to higher ground, away from the coast If caught in a tsunami, grab onto something that floats Wait for official clearance before returning, watch out for debris Volcanic Eruption Ashfall, lava flows, pyroclastic flows, gas emissions Know evacuation routes, prepare a supply kit, wear protective gear Seek shelter indoors, protect yourself from ashfall Stay indoors until advised it is safe, clear ash from roofs During natural disasters, I should stay informed, stay safe, and help others if possible to ensure disaster preparedness.