A Strong Earthquake Turned a High-Powered Telescope Into a Seismograph

Scientists have gotten awfully good at the business of seismography. At any moment, the Global Seismograph Network (GSM), a web of 150 instruments arrayed around the world, is reliably taking the pulse of the planet. There have been seismographs on the moon — sensitive enough to detect the footsteps of the astronauts who brought them there. A seismograph is currently at work on Mars, as part of the suite of instruments carried by NASA's InSight lander.

Scientists have gotten awfully good at the business of seismography. At any moment, the Global Seismograph Network (GSM), a web of 150 instruments arrayed around the world, is reliably taking the pulse of the planet. There have been seismographs on the moon — sensitive enough to detect the footsteps of the astronauts who brought them there. A seismograph is currently at work on Mars, as part of the suite of instruments carried by NASA's InSight lander.