Calibration of Local Magnitude M sub(L) in the Azores Archipelago Based on Recent Digital Recordings

--The development of the digital seismic network in the Azores Archipelago during recent years made it possible to obtain the amplitudes (waveform) of recorded motion in a large set of stations. With this new data, maximum amplitudes of the Wood Anderson seismograph are computed, for each station/component, which, together with epicentral distances, allows for the estimation of local magnitude M sub(L). We used data recorded in 8 digital permanent three-component stations, with inter-station's distances up to 300 km, in the period June 1998 - June 2000, corresponding to a set of 1315 events with magnitude (M sub(L) or M sub(D)) 2