The 1958 Lituya Bay earthquake occurred on July 9, 1958, at 22:15:58 PST with a moment magnitude of 7.8 to 8.3 and a maximum Mercalli intensity of XI. The strike-slip earthquake took place on the Fair
Part of the south shore of Lituya Bay showing the trimline, with bare rock below
Damage to a tree at the mouth of the bay from the wave. Hat placed on stump for scale.
The effects of the tsunami still visible in 2010. Differently-aged vegetation grows on the ridge separating Lituya Glacier from the main part of the bay. The orientation is looking north from the head of the bay, with Lituya Glacier to the right.
The Modified Mercalli intensity scale measures the effects of an earthquake at a given location. This is in contrast with the seismic magnitude usually reported for an earthquake.
1958 Lituya Bay earthquake and megatsunami
…The 1958 Lituya Bay earthquake occurred on July 9, 1958, at 22:15:58 PST (July 10 at 06:15:58 UTC) with a moment magnitude of 7.8 to 8.3 and a maximum Mercalli intensity of XI (Extreme). The strike-slip earthquake took place on the Fairweather Fault and triggered a rockslide of 30 million cubic meters (40 million cubic…
Lisbon, Portugal, during the Great Lisbon earthquake in 1755