Why seismic station don't always record data from every earthquake?

Seismic stations may not record data from every earthquake due to several factors, including the distance of the earthquake from the station, which can affect the signal's strength and clarity. Additionally, technical issues such as equipment malfunctions or maintenance can lead to gaps in data collection. Environmental factors, such as noise from human activities or natural phenomena, can also interfere with the ability of a station to capture seismic signals. Lastly, smaller earthquakes may not produce strong enough waves to be detected by all stations.