Hello little one!
Do you know what electricity and magnetism are?
Electricity is the thing that makes your light bulbs light up and your toys move when you plug them in. Magnetism is the thing that makes magnets stick together and push away from each other.
Now let's talk about controlled source electromagnetic (CSEM). CSEM is a way to explore what's underneath the earth's surface without digging big holes. Scientists use a special tool that sends electric and magnetic waves down into the ground.
The tool sends out a controlled amount of electricity and measures the magnetic waves that come back up. From these measurements, scientists can learn about what's buried deep below the surface of the earth, like oil and gas, minerals, or even ancient fossils.
So think of it like playing hide and seek. Scientists want to find something hidden underground, like treasure. Instead of digging random holes and hoping to find the treasure, they use CSEM to send a signal underground and see if anything sends a signal back. If something does, they know where to look for the treasure!
And that's how controlled source electromagnetic works. It helps us explore and learn about things hidden beneath the earth's surface without having to dig big holes.