As I have had occasion to study and compare the records of nearly all the types of seismographs for recording distant earthquakes which are now in use, I may perhaps be permitted to add something ...

The earthquake, which originated southwest of the Cayman Islands, was detected by a seismograph in Sonora, around 50 miles ...

A team of scientists deployed underwater seismographs near Santorini’s Kolumbo volcano to monitor seismic activity after ...