A Richter scale also known as local magnitude (ML) scale:
Heres a copy of one
http://www.sdgs.usd.edu/publications/maps/earthquakes/images/RichterScale.gif
Contour map
The name of the CalTech seismologist who invented the scale used to measure the magnitude of earthquakes is Charles F. Richter. The scale is called the Richter scale and measures the energy released by an earthquake at its source.
A seismometer (replacing the outdated term seismograph), but other instruments may also respond to an earthquake. The simplest example of a seismograph is a pendulum.
The region of zero electron density is called a "node."
The machine that graphs earthquakes is called a seismograph. It measures the motion of the ground caused by seismic waves generated by earthquakes.
A seismometer.
Seismology.
Richter scale
A multivariate graph.
Tsunami
Ring of fire
Contour map
The Ring of Fire.
vertex
Earthquakes aren't given names, but they are given magnitudes, if that's helpful. The magnitude for the earthquake that caused the Hati disaster was 7.0.
hexonagle develoment
Contour Map