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 ...

By using seabed seismographs placed safely outside the ... Megan Baker of Durham University, said, "This multidisciplinary work brought together geologists, seismologists, and engineers to advance ...

We have instruments in the World-Wide Standardized Seismograph Network (WWSSN) and in the New England Seismic Network (NESN), so we do record earthquakes from all over the earth. The Boston College ...