In 1972, we had an earthquake centered in Sylmar, California. At the time I lived about 20 miles away in La Crescenta. The magnitude was 6.5.
It took place around 7:00am. My friend had opened up the local Mobil Service station and was there alone. He was out front where he could look up the street, and he watched the waves come down toward him.
This unnerved him so badly, that he jumped in his car and drove home leaving the business wide open.
For this reason, I know that those waves can be seen at much much lower magnitudes than 10.0.
In 1972, we had an earthquake centered in Sylmar, California. At the time I lived about 20 miles away in La Crescenta. The magnitude was 6.5.
It took place around 7:00am.