Question

1. what four activities can trigger a tsunami?

1. how tall can a wave from a tsunami reach?

1. what tsunami is believed to be the deadliest tsunami?

1. what do tsunami warning centers monitor?

image: earthquake tsunami diagram showing earthquake, fault line, water level, and tsunami waves

Explanation:

1. For question 42: Tsunamis are triggered by large-scale disturbances to ocean floors or bodies of water. The four most common triggers are geological and hydrological events that displace massive amounts of water.
2. For question 43: Coastal tsunami heights can vary drastically, with extreme cases reaching very high levels near shore after traveling across the ocean.
3. For question 44: The deadliest tsunami on record caused catastrophic loss of life across multiple countries in the Indian Ocean.
4. For question 45: Tsunami warning centers track phenomena that signal potential tsunami formation and movement.

Answer:

1. Underwater earthquakes, underwater volcanic eruptions, landslides (coastal or submarine), and meteorite impacts in oceans
2. Tsunami waves can reach heights of over 30 meters (100 feet) near coastal areas, in extreme cases.
3. The 2004 Indian Ocean Tsunami (triggered by the 9.1-magnitude Sumatra-Andaman earthquake)
4. They monitor underwater/seafloor earthquakes, ocean water levels (via tide gauges), and the propagation of potential tsunami waves across ocean basins.