In the last months, there has been a storm both in traditional and social media about the observation that the Covid-19 lockdown measures cause an unprecedented seismic urban “silence”, which is observed globally on many urban seismic stations. It is the first time that such a protracted noise reduction has been observed on a global scale at the same time. To gather all seismological analyses that arise from this unique period, we are organising a Solid Earth special issue on the effects of the Covid-19 lockdown measures on global seismic noise. Any papers fitting the following thematics/topics are welcomed:

• key elements of anthropogenic ambient noise data processing
• anthropogenic noise source characterisation and detection
• influence of sensor types, self-noise, etc., on anthropogenic ambient seismic noise
• improvement of network performance and seismicity studies
• improved magnitude completeness
• “new” event detections during lockdown periods
• improved volcano monitoring
• noise reduction comparison with other observables
• mobility data
• other environmental physical data, like “audible noise”
• new ideas of comparison
• advantages of lockdown “silence” on felt earthquake report data.

Do not hesitate to contact the special issue editors prior to submission to discuss the eligibility of your ideas.