This graph shows the percentages of tsunami causes: 77% of tsunamis are caused by earthquakes, 10% of causes are unknown, 6% caused by volcanic activity, 4% by meteorological events, and 3% by landslides.
Additional media resources may be found by searching the Films on Demand database. https://libguides.sbuniv.edu/FOD
NOAA defines a tsunami as "a series of waves caused by earthquakes or undersea volcanic eruptions." -- What is a tsunami?
NOAA defines a seiche as a "standing wave oscillating in a body of water." -- What is a seiche?