> the sudden displacement of water resulted in a megatsunami that washed out trees to a maximum elevation of 520 metres That reads to me that it ran uphill to

> the sudden displacement of water resulted in a megatsunami that washed out trees to a maximum elevation of 520 metres That reads to me that it ran uphill to an altitude of 520 metres, rather than that the wave itself was a 520m tall wall of water.