An earthquake-related oscillation of water in a basin is called a seiche.
A seiche is a standing-wave motion in an enclosed or partly enclosed body of water. Earthquake shaking can disturb a lake, reservoir, harbour or swimming pool, after which the water oscillates back and forth at one or more natural frequencies.
The motion can continue after the strongest ground shaking ends. Its size depends on the basin’s shape, depth, dimensions and resonance, as well as the strength and direction of the earthquake motion. Seiches have been observed in lakes and reservoirs after major earthquakes.
A seiche is different from a tsunami. A tsunami is a long-wavelength wave that usually travels across an ocean or coastal region after major water displacement, while a seiche is chiefly a basin’s resonant oscillation. Liquefaction is also unrelated: it is the loss of strength in water-saturated sediment.