duffy pointed out that his chart was from a single tide gauge station, near san francisco, and that sea levels rise at different rates around the world
duffy pointed out that his chart was from a single tide gauge station, near san francisco, and that sea levels rise at different rates around the world
1906 san francisco earthquake:24
an offshore epicenter is supported by the occurrence of a local tsunami recorded by a tide gauge at the san francisco presidio; the wave had an amplitude of approximately 3 in (8 cm) and an approximate period of 40–45 minutes.