A Discussion on the measurement and interpretation of changes of strain in the Earth - Small earthquakes observed with local seismometer networks

Abstract

Recent developments in instrumentation allow networks of radio-linked seismometers, recording on magnetic tape, to be easily established in areas of micro-earthquake activity. Observations with such networks enable the location and some of the source parameters of small earthquakes to be examined in detail. Accurate locations require adequate knowledge of the velocity structure within the area of the network, and suitable source station geometry. Given such a network, it should be possible to estimate crustal structure sufficiently accurately to give good epicentre and depth locations for small earthquakes within the network.