Additional data (seismic stations) may be added at a later time.

Additionally, a network of seismic stations is active throughout the country.

These are the first seismic stations ever in the country.

The village housed a seismic station until 1960, when it was closed down.

"And pray the seismic station is working when we get there."

"You were obviously in fine form back at that seismic station."

"How far are we from Mutchler at the seismic station?"

Such information is especially important in the Northeast, he added, "where we don't have many seismic stations."

We thought it would be useful for seismic stations around the world.

The number of seismic stations has increased from about 350 in 1931 to many thousands today.