Method for detecting earthquakes including the steps of : • providing a network of lights comprising a plurality of lights, each light having a control module associated therewith, each control module comprising: - a long-distance communication module, - a short-distance communication module, - a geocoordinates module, - a controller , and - a control output for controlling a driver of the light, wherein at least some of the control modules comprise at least one sensor for detecting at least one of acceleration and seismic waves, • providing at least one server reachable via the long-distance communication module, • dividing the control modules into one or multiple control module groups based on at least one of: environmental, light and control module information provided by the control modules , • selecting one of the control modules of each group as a group controller with which all other control modules of the group can communicate via their short-distance communication modules, • forming a short-distance network with the group controller and the other control modules within the group, via respective short-distance communication modules, • during normal network operation, only the group controllers transmitting to the at least one server sensor information of the control modules comprising sensors , and information of the respective geocoordinates module, received from the other control modules via the short-distance communication module , the normal network operation being a situation in which each control module of the network is allocated to a group and in which all control modules control the light, and • analysing, on the at least one server , the sensor information provided by the control module sensors to identify seismic waves. • providing a network of lights comprising a plurality of lights, each light having a control module associated therewith, each control module comprising: - a long-distance communication module, - a short-distance communication module, - a geocoordinates module, - a controller , and - a control output for controlling a driver of the light, wherein at least some of the control modules comprise at least one sensor for detecting at least one of acceleration and seismic waves, - a long-distance communication module, - a short-distance communication module, - a geocoordinates module, - a controller , and - a control output for controlling a driver of the light, wherein at least some of the control modules comprise at least one sensor for detecting at least one of acceleration and seismic waves, • providing at least one server reachable via the long-distance communication module, • dividing the control modules into one or multiple control module groups based on at least one of: environmental, light and control module information provided by the control modules , • selecting one of the control modules of each group as a group controller with which all other control modules of the group can communicate via their short-distance communication modules, • forming a short-distance network with the group controller and the other control modules within the group, via respective short-distance communication modules, • during normal network operation, only the group controllers transmitting to the at least one server sensor information of the control modules comprising sensors , and information of the respective geocoordinates module, received from the other control modules via the short-distance communication module , the normal network operation being a situation in which each control module of the network is allocated to a group and in which all control modules control the light, and • analysing, on the at least one server , the sensor information provided by the control module sensors to identify seismic waves. <EOS>