Today I managed to get a recording of a Mag 5.7 earthquake 206 miles (331 km) away. If you have headphones handy, put them on and listen to the sound of the earthquake. Headphones or good speakers are recommended because the frequencies are quite low.

The data comes as a side effect of the design of a home-made magnetometer I operate. When there is an earthquake nearby, the mirror starts swinging – this messes up the magnetometer record, but can be used to detect earthquakes quite far from here.