Earthquakes occur when stress build-up in the earth’s crust exceeds the strength of the rock, but tectonic plate motion isn’t the only source of stress. We can change rock stress and trigger earthquakes to occur sooner than they may have otherwise.
What are faults, what do the different types of fault mean, and what has that got to do with the SRC logo?
When you feel the earth shaking, it might feel like the earthquake is right under you, but it’s likely that the earthquake started dozens of kilometres away.
How can an earthquake have a negative magnitude? It’s got to do with ground motion and distance, and how sensitive seismographs have become.