USGS Rapid Moment Tensor Solution
Sample Moment Tensor Solution and Explanation of Parameters
94/06/09 00:33:16.4 | Date and origin time (UTC)
NORTHERN BOLIVIA | Geographic region
Epicenter: -13.834 -67.563 | Epicenter: Latitude Longitude
Mw 8.2 | Moment magnitude
|
USGS MOMENT TENSOR SOLUTION | Depth (in kilometers) from moment tensor
Depth 632 No. of sta: 13 | inversion and number of stations used
Moment Tensor; Scale 10**21 Nm |
Mrr=-1.00 Mtt= 0.92 | Elements of the moment tensor in r,
Mff= 0.09 Mrt=-1.69 | theta, phi coordinate system
Mrf=-0.09 Mtf=-0.37 | * "Scale"
Principal axes: | Moment tensor decomposed into its
T Val= 1.94 Plg=29 Azm=190 | principal axis system. "Val" are
N 0.08 10 94 | the eigenvalues, and "Plg" and "Azm"
P -2.02 59 346 | are the orientations of the
| eigenvectors. "T" and "P" are the
| tensional and compressional axes.
Best Double Couple:Mo=2.0*10**21 | Scalar moment
NP1:Strike=308 Dip=18 Slip= -55 | Nodal planes: all double couples can be
NP2: 91 75 -101 | represented by two orthogonal nodal
| planes; which is the actual fault plane
| must be inferred from other data and/or
####### | assumptions.
################# | "Beachball" is a graphical representation
#--------------###### | of source geometry/radiation pattern
--------------------#####
------------------------#####
------------- -----------####
------------- P ------------###
-------------- -------------###
-------------------------------##
-------------------------------##
#######---------------------####-
################################-
##############################-
##############################-
########### ##############-
######### T #############
####### ###########
#################
#######
See also: Focal Mechanisms
