"地震波反射" can be translated into English as "seismic wave reflection" or "reflection of seismic waves".
"Seismic wave reflection" is a more concise and commonly used term in geophysics and related fields.
"Reflection of seismic waves" is a slightly more verbose but equally accurate expression, emphasizing the action of reflection on seismic waves.
Both expressions are correct and can be used interchangeably depending on the context and preference.