zoom_in Click to enlarge

Inge Lehmann

▲ ▼

description Inge Lehmann Overview

Inge Lehmann was a Danish geophysicist whose meticulous analysis of seismic data in 1906 led to a groundbreaking discovery. She identified the Earth’s solid inner core, a feature previously unknown. This revelation fundamentally altered our understanding of planetary structure and is essential for scientists studying earth science, geophysics, and seismology. Her work remains pivotal in the field.

help Inge Lehmann FAQ

How did Inge Lehmann discover the Earth's solid inner core?

Lehmann achieved this in 1936 by meticulously analyzing the seismic waves generated by earthquakes. She noticed that certain types of seismic waves, called P-waves, were bouncing off something deep inside the Earth and appearing in "shadow zones" where they shouldn't have been.

Before Inge Lehmann's discovery, what did scientists think was inside the Earth?

Prior to her paper, simply titled "P','" the scientific consensus was that the Earth had a completely liquid core. Lehmann proved mathematically that a solid boundary must exist within that liquid layer, creating the model of a solid inner core surrounded by a fluid outer core.

What specific seismic waves did Inge Lehmann use to prove the inner core?

Lehmann focused her analysis on Primary waves, or P-waves, which are compressional waves that travel through the Earth's layers. By observing how these specific waves refracted and reflected deep within the planet, she deduced the presence of the solid core.

Where did Inge Lehmann conduct her seismological research?

Lehmann began her career working at the Royal Danish Geodetic Institute in Copenhagen. She continued her seismic research late into her life, publishing her final scientific paper at the remarkable age of 99.