How to detect earthquakes at home?

To detect earthquakes at home, you can purchase a seismometer or seismograph. These devices measure the ground motion caused by seismic waves and can detect even small earthquakes. You can also install an earthquake alarm, which is a device that detects seismic waves and sounds an alarm when an earthquake is detected. Additionally, you can install a home monitoring system that uses sensors to detect seismic activity and sends an alert to your phone or computer.