Tag: IRIS

What is the Moho? How was it Discovered? (Educational)

No Picture

How do scientists know that there is a boundary called the Moho that separates Earth’s thin crust from the upper mantle? First a little history on one of the greatest contributors to seismology from the early 1900s. Andrija…

Read More »

Plate Tectonics—History of How it was Discovered (Educational)

Plate Tectonics—History of How it was Discovered (Educational)

Plate tectonics theory was not accepted for centuries because no one could adequately answer the question, “What is the mechanism that drives the plates?” In the late sixteenth century. Abraham Ortelius, in compiling New World explorer maps noted…

Read More »

Earthquake Sends Seismic Waves to one station (educational

Earthquake Sends Seismic Waves to one station (educational

Body waves from distant earthquakes travel a curving path through the earth arriving at seismic stations from below. The compressive motion of a P-wave is in the direction the wave travels, thus the motion of the seismometer will…

Read More »