Surface wave magnitude scale

Description

The surface wave magnitude (M_s) scale is one of the magnitude scales used in seismology to describe the size of an earthquake. It is based on measurements in Rayleigh surface waves that travel primarily along the uppermost layers of the earth.

Related formulas

Variables

MsSurface wave magnitude scale (dimensionless)
AThe maximum particle displacement in surface waves (magnitude) (dimensionless)
TThe corresponding period (magnitude) (dimensionless)
ΔThe epicentral distance (magnitude) (dimensionless)