It’s almost the 4th of July! As you prepare for the holiday weekend, here are some helpful DIY magnet crafts you can use to make your life easier. Continue reading
It’s almost the 4th of July! As you prepare for the holiday weekend, here are some helpful DIY magnet crafts you can use to make your life easier. Continue reading →
Electromagnetic pulses (EMPs) occur when a rapidly accelerating electric current generates a magnetic field and causes a burst of electromagnetic energy. Commonly caused by lightning strikes, EMPs can cause power outages and can even damage electronics by short-circuiting them. While we have ways of protecting ourselves against EMPs caused by lightning, can we use EMPs for our own purposes?
There’s a reason why metal attracts lightning better than other materials: Electrical currents cause magnetic fields to form around them. Lightning strikes are rapidly moving electric currents and the movement of electric charges produces a magnetic field. This is called electromagnetism. The electromagnetic properties of lightning are apparent in several ways. The two most apparent magnetic properties of lightning, however, are remanent magnetization and electromagnetic pulses. Continue reading →
Scientists can study the history of Earth’s magnetic field by using Earth’s rocks as records. Paleomagnetism is the study of magnetic rocks and sediments to record the history of the magnetic field. Some rocks and materials contain minerals that respond to the magnetic field. So, when rocks form, the minerals align with the magnetic field preserving its position. It’s called rock magnetism when rocks record the position of the magnetic field. The magnetic signature of the rocks allows paleomagnetists to date the rocks and map the position of the field at the time of their formation. Continue reading →
A geomagnetic storm recently caused some unusual aurora sightings on Earth. The storm is a result of solar eruptions strong enough to disturb Earth’s magnetosphere. The magnetosphere usually protects us from solarwinds so what made this disturbance different? Continue reading →