Near-Regional Waveforms: Selected Observations from Two Eastern North American Earthquake Sequences
1988 ◽
Vol 59
(4)
◽
pp. 189-196
◽
Abstract The 19 October, 1985 Ardsley, New York magnitude 4.0 mainshock can be characterized as the superposition of three sub-events. Aftershocks of the 31 March, 1982 Miramichi, New Brunswick magnitude 5.0 earthquake occur at nearly the same depth as the mainshock, approximately 3 km, and at least one aftershock is resolvably deeper by several kilometers. These results are interpreted from observations of digital recordings of near-regional seismograms.