What is the Moho and who discovered it how was it discovered?
The Moho is widely believed to be the boundary between Earth’s crust and an underlying layer of denser rocks in Earth’s interior called the mantle. It is named after Croatian seismologist Andrija Mohorovicic, who first detected it in 1909 by examining seismic waves moving through the Earth.
How did Andrija Mohorovicic discovered the mantle?
Mohorovicic was surprised to find that some readings reached his instruments faster than he had thought possible. He deduced that some of the seismic waves were traveling through a deeper, denser portion of the Earth, now called the mantle, while slower waves traveled through the crust.
How did Andrija Mohorovicic support his theory?
From these readings and those of other stations, Mohorovičić observed that certain seismic waves arrived at detecting stations sooner than anticipated, and he deduced that the earthquake was centred in an outer layer of Earth—since called its crust—and that the fast waves had traveled through an inner layer—the mantle.
Who discovered the Moho layer?
Andrija Mohorovicic
The Moho is the boundary between the crust and the mantle in the earth. This is a depth where seismic waves change velocity and there is also a change in chemical composition. Also termed the Mohorovicic’ discontinuity after the Croatian seismologist Andrija Mohorovicic’ (1857-1936) who discovered it.
What did Croatian scientist Andrija Mohorovicic discover in 1909?
The Mohorovicic Discontinuity was discovered in 1909 by Andrija Mohorovicic, a Croatian seismologist. Mohorovicic realized that the velocity of a seismic wave is related to the density of the material that it is moving through. The acceleration must be caused by a higher density material being present at depth.
Who suggested the Moho project?
Walter Munk
The project was suggested in March 1957 by Walter Munk, NAS member (1956) and member of the National Science Foundation (NSF) Earth Science Panel. Project Mohole represented, as one historian has described it, the earth sciences’ answer to the space program.
How did Andrija Mohorovicic discovered the compositional differences between the mantle and crust?
it is noted that Mohorovicic discovered the crust-mantle boundary by noting a change in speed of the seismic waves. Specifically, as one crosses the boundary the predominant mineral composition of the rock changes, and the minerals on the mantle side enable seismic waves to travel faster.
Who is Andrija Mohorovicic why is he important?
Mohorovicic’s major contribution for which he is famous is the discovery of the discontinuity between the mantle and the crust. In 1909 a major earthquake in Croatia provided Mohorovicic with empirical evidence that he used to discover the division between the crust and the mantle, as well as the mantel and the core.
Is there a planet inside the earth?
A Mars-sized planet that struck Earth 4.5 billion years ago and gave birth to the moon may have left two giant pieces of itself deep in Earth’s mantle, a new study suggests. Scientists have long agreed on the existence of the planet, called Theia, and its role in creating the moon.
How did Andrija Mohorovicic discover the compositional differences between the mantle and crust?
How did scientist learn about the structure of inner Earth?
Scientists are able to understand Earth’s interior by studying seismic waves. Seismic waves are recorded by a machine called a seismograph, which tells us about the strength and speed of the seismic waves. These recordings made by a seismograph are called seismograms.
What was Project Moho?
Project Mohole was an attempt to retrieve a sample of material from the earth’s mantle by drilling a hole through the earth’s crust to the Mohorovicic Discontinuity, or Moho. The Mohorovicic Discontinuity marks the boundary between the earth’s crust and mantle.
When did Andrija Mohorovicic discover the Moho boundary?
8, 1909, the geophysicist Andrija Mohorovičić discovered the discontinuity (often called the Moho) that separates the crust from the underlying mantle.…. Moho. Moho, boundary between the Earth’s crust and its mantle. The Moho lies at a depth of about 22 mi (35 km) below continents and about 4.5 mi (7 km) beneath the oceanic crust.
When was Andrija Mohorovicic born and when did he die?
Andrija Mohorovičić, (born Jan. 23, 1857, Volosko, Croatia, Austrian Empire [now in Croatia]—died Dec. 18, 1936, Zagreb, Yugos.), Croatian meteorologist and geophysicist who discovered the boundary between the Earth’s crust and mantle—a boundary subsequently named the Mohorovičić discontinuity.
Who is the discoverer of the Moho discontinuity?
This surface is known as the Mohorovicic Discontinuity or often simply referred to as the “Moho.” How Was the Moho Discovered? The Mohorovicic Discontinuity was discovered in 1909 by Andrija Mohorovicic, a Croatian seismologist.
How did Andrija Mohorovicic discover the discontinuity of seismic waves?
The Mohorovicic Discontinuity was discovered in 1909 by Andrija Mohorovicic, a Croatian seismologist. Mohorovicic realized that the velocity of a seismic wave is related to the density of the material that it is moving through.