A method of collecting data from wireless sensor units arranged in a mesh network is disclosed, each wireless sensor unit having one or more sensors arranged on or below the ground surface for remote seismic recording, the method comprising: clustering the wireless sensor units into two or more sub mesh clusters, each sub mesh cluster having an aggregator assigned to the sub mesh cluster; acquiring data with the wireless sensor units by sensing one or more physical parameters; within each sub mesh cluster, each of the wireless sensor units transmitting the acquired data directly or indirectly to the respective aggregator; each aggregator aggregating at least a portion of the acquired data received from the wireless sensor units within the respective sub mesh cluster into aggregated data; and each aggregator transmitting the aggregated data to a base node. A wireless mesh network for remote seismic recording is also disclosed.