The number of seismic stations worldwide has increased enormously over the past decades and continues to rise as new and denser networks are installed. The increase in station numbers has gone in parallel with instrumental developments, so that today broadband seismometers and high dynamic range digitizers are the standard for most applications. While the decision to acquire high-spec instruments may appear obvious, there are other requirements for the successful and sustainable operation of a seismic network. Over the years we have seen good and bad examples of seismic networks, and we believe it is time to reflect on our experience...

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