Seismographs are instruments used to measure and record ground motion, or seismic waves, caused by explosions and earthquakes. In the late 1800s, John Milne, an English mining engineer, developed the first precise seismometer, the sensor in a...

A seismograph is an instrument used to measure and record ground vibration caused by explosions and earthquake shock waves. In the late 1800s, John Milne (1850–1913), an English mining engineer, developed the first precise seismometer, the...

Seismometers (in Greek seismos = earthquake and metero = measure) are instruments that measure and record motions of the ground, including those of seismic waves generated by earthquakes, nuclear explosions, and other seismic sources. Records of seismic...

Researchers have installed a seismometer atop an active volcano called Kick 'em Jenny under the Caribbean Sea to warn of eruptions or earthquake activity, scientists said Saturday.The device allows scientists to collect real-time rumbling from tremors or as bubbling magma and gases are released from...

Researchers have installed a seismometer atop an active volcano called Kick 'em Jenny under the Caribbean Sea to warn of eruptions or earthquake activity, scientists said Saturday.The device allows scientists to collect real-time rumbling from tremors or as bubbling magma and gases are released from...

The federal government plans to increase by five times the number of advanced earthquake monitors in the Hawaiian Islands within 18 months, the Pacific Tsunami Warning Center said Monday. The idea was not prompted by last week's magnitude 6.7 earthquake...