The ANSS event ID is usp00089qj and the event page is at https://earthquake.usgs.gov/earthquakes/eventpage/usp00089qj/executive.
1997/10/28 11:44:18 47.67 -69.91 11.7 4.26 Quebec, Canada
USGS/SLU Moment Tensor Solution ENS 1997/10/28 11:44:18:0 47.670 -69.910 11.7 4.3 Quebec, Canada Stations used: Filtering commands used: Best Fitting Double Couple Mo = 3.09e+22 dyne-cm Mw = 4.26 Z = 5 km Plane Strike Dip Rake NP1 27 66 111 NP2 164 31 51 Principal Axes: Axis Value Plunge Azimuth T 3.09e+22 63 331 N 0.00e+00 19 198 P -3.09e+22 18 102 Moment Tensor: (dyne-cm) Component Value Mxx 3.77e+21 Mxy 2.73e+21 Mxz 1.28e+22 Myy -2.52e+22 Myz -1.52e+22 Mzz 2.14e+22 ############## --###################- ----####################---- ---######################----- ----#######################------- -----#######################-------- -----######### ###########---------- ------######### T ###########----------- -----########## ##########------------ ------#######################------------- ------######################-------------- -------####################--------- --- -------###################---------- P --- ------##################----------- -- -------################----------------- -------##############----------------- -------############----------------- -------#########------------------ -------#####------------------ --------#------------------- ----####-------------- #########----- Global CMT Convention Moment Tensor: R T P 2.14e+22 1.28e+22 1.52e+22 1.28e+22 3.77e+21 -2.73e+21 1.52e+22 -2.73e+21 -2.52e+22 Details of the solution is found at http://www.eas.slu.edu/eqc/eqc_mt/MECH.NA/19971028114418/index.html |
STK = 27 DIP = 66 RAKE = 111 MW = 4.26 HS = 5
The NDK file is 19971028114418.ndk
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Older earthquake were studied using analog seismograms, which were digitized and analyzed. The original data are not longer available. However focal mechanism solutions based on the waveforms are given in published literature. At the same time, a given earthquake may have been analyzed independently, and the reference is given here.
For this earthquake the source reference is the following:
Du, Wen-xuan; Kim, Won-Young; Sykes, Lynn R. (2003). Earthquake Source Parameters and State of Stress for the Northeastern United States and Southeastern Canada from Analysis of Regional Seismograms, Bull. Seism. Soc. Am. 93, 1633 - 1648.
The DU model used for the waveform synthetic seismograms and for the surface wave eigenfunctions and dispersion is as follows (The format is in the model96 format of Computer Programs in Seismology).