Seismogram and spectrogram from station MTM (distance = 6.2km)

Spectrogram from MTM
Seismogram (top) and spectrogram between 1 and 8Hz for a 50 minute period around the canal failure time.  The last event at 06:56 (1,058 sec) could be located using seismic arrivals at about 10 PNSN stations.