The ANSS event ID is usp0007nvk and the event page is at https://earthquake.usgs.gov/earthquakes/eventpage/usp0007nvk/executive.
1996/08/21 07:54:14 44.184 -71.352 10 3.44 New Hampshire
USGS/SLU Moment Tensor Solution ENS 1996/08/21 07:54:14:0 44.184 -71.352 10.0 3.4 New Hampshire Stations used: Filtering commands used: Best Fitting Double Couple Mo = 1.82e+21 dyne-cm Mw = 3.44 Z = 7 km Plane Strike Dip Rake NP1 144 60 93 NP2 318 30 85 Principal Axes: Axis Value Plunge Azimuth T 1.82e+21 75 62 N 0.00e+00 3 322 P -1.82e+21 15 232 Moment Tensor: (dyne-cm) Component Value Mxx -6.22e+20 Mxy -7.74e+20 Mxz 4.96e+20 Myy -9.52e+20 Myz 7.63e+20 Mzz 1.57e+21 -------------- ---------------------- #-###############----------- --###################--------- ----######################-------- ------#######################------- -------########################------- --------#########################------- ---------############## ########------ -----------############# T #########------ ------------############ ##########----- -------------########################----- --------------########################---- --------------#######################--- ---------------######################--- --- ----------####################-- -- P ------------#################-- - --------------###############- -------------------########### ----------------------###### ---------------------- -------------- Global CMT Convention Moment Tensor: R T P 1.57e+21 4.96e+20 -7.63e+20 4.96e+20 -6.22e+20 7.74e+20 -7.63e+20 7.74e+20 -9.52e+20 Details of the solution is found at http://www.eas.slu.edu/eqc/eqc_mt/MECH.NA/19960821075414/index.html |
STK = 144 DIP = 60 RAKE = 93 MW = 3.44 HS = 7
The NDK file is 19960821075414.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).