As the drum and paper shake next to the pen, the pen makes squiggly lines on the paper, creating a record of the earthquake. This record made by the seismograph is called a seismogram. When you look ...

Communities from Maine to Massachusetts felt a 3.8 magnitude earthquake rattle across the ground Monday morning.

Time is indicated at the left end of the lines in Universal (or Greenwich) Time. When an earthquake occurs, the seismogram will show ground motion fluctuations that typically last from tens of seconds ...

There are a number of ways to measure the magnitude of an earthquake. Most scales are based on the amplitude of seismic waves recorded on seismometers. These scales account for the distance between ...

The researchers noted that the earthquake's coda waves—the signature of residual vibrations at the end of a seismogram—lasted an unusually long time, recorded by stations in Morocco.

In an earthquake, scientists can observe the arrival of compression waves before the arrival of shear waves using seismographs. You may choose to show a close-up of a record (seismogram ...

A 3.8-magnitude earthquake centered near the Maine coast rattled houses in northern New England on Monday and was felt by surprised residents of states hundreds of miles away.

They were produced as part of an earthquake that occurred deep under Spain. Upon closer look, scientists realized that coda waves—residual vibrations at the end of a seismogram—lasted a lot ...

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In southern Maine, many residents reported feeling houses and buildings shake as the surprising earthquake interrupted a sunny winter morning. A screenshot of a seismogram from the Weston Observatory ...