A megathrust earthquake is a rupture of the fault between two converging plates at a subduction zone, where one plate dives beneath the other. The USGS subduction zone science page on earthquakes ties
Every earthquake has two locations, and most maps only show one. The hypocenter is the point underground where the rupture starts, and the epicenter is the point on the surface straight above it. The
The northern lights are one of the few natural events you can check with two HTTP requests. NOAA's Space Weather Prediction Center publishes its aurora data as plain JSON files, with no API key and no
Seismologists use earthquake magnitude to express the size of a quake at its source, as one figure calculated from the ground motion that seismometers record. Each whole step in magnitude means 10 t