# nodal plane

## no·dal plane

the plane corresponding to the optic center of a simple lens. See: nodal point.
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Matlab codes are generated to compute the fault parameters of nodal plane 2 or the auxiliary plane.
Normally, the DMT inversion creates two nodal planes. Only one nodal plane agrees with fault lines in a topographic map (Figure 2), which is specified and presented in Table 2 as the values of strike, dip, and rake.
This figure exhibits two lobes, each almost hemispherical but with rounded edges: the positive lobe for [[psi].sub.0,1,0] > 0 is axially symmetric about axis z with z > 0; the negative lobe for [[psi].sub.0,1,0] < 0 is also axially symmetric about axis z but with z < 0; a narrow gap between those surfaces contains a nodal plane between these two lobes at which [[psi].sub.0,1,0] = 0.
The polarity observations and nodal plane solutions of six events are nearly identical (events number 1, 2, 5, 7, 12 and 14, Table 2, Fig.
They were characterized by a shear mechanism and the nodal plane trend was in NE-SW direction (such as the fault VIa).
The plane of the nodal plane agrees well with the structure by the locations of AE.
Only one lobe is discernible, corresponding to a positive phase of [[psi].sub.0,1,0]; there is no nodal plane. As the amplitude function contains a factor r, the function has zero amplitude at the origin of the coordinate system and hence formally an inner surface at which [[psi].sub.0,1,0] = 0.00093 [a.sub.0.sup.-3/2], but its radius is too small to appear even when the surface is cut open.
The shallow, normal mechanism was determined by the ETHZ Swiss Moment Tensor Solution for the main earthquake on November 30, 2004: h = 4km, [M.sub.o] = 6.3E+22dyn cm, [M.sup.W] = 4.5, Nodal Plane 1: strike = 246, rake = -80, dip = 66, Nodal Plane 2: strike = 43, rake = -112, dip = 26, (http ://www.seismo.
With respect to SUW, as will be discussed later, SUW happened to be located close to the nodal plane of P waves and in the direction of maximum Sg waves (compare seismograms in Figure 4).
Each mechanism consists of steep or moderately dipping WNW-ESE to NW-SE trending nodal plane and of another steep NNE-SSW to NE-SW trending nodal plane.
The strike and dip of the first nodal plane are 355[degrees] and 57[degrees] respectively.
The main idea is then to determine if matching the nodal planes of both elements in the annular array may enhance the synergy of both elements and have some positive influence on achieving a more uniform displacement of both elements and a more reduced cross-talk.

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