(Left) Father James B. Macelwane, S.J. (1883–1956) organized the Jesuit Seismological Service, whose central station is at Saint Louis University. The Macelwane Medal is awarded annually by the American Geophysical Union to its most accomplished young scientists. We owe the lone US recording the 1911 earthquake to Father Macelwane. (Right) Comparison of seismograms for the 1984 Morgan Hill (top) and 1911 Calaveras (bottom) earthquakes recorded on similar seismometers at Debilt, Netherlands. From Doser et al. (2009).