Learn R Programming

RFOC (version 3.4-14)

Graphics for Spherical Distributions and Earthquake Focal Mechanisms

Description

Graphics for statistics on a sphere, as applied to geological fault data, crystallography, earthquake focal mechanisms, radiation patterns, ternary plots and geographical/geological maps. Non-double couple plotting of focal spheres and source type maps are included for statistical analysis of moment tensors.

Copy Link

Version

Install

install.packages('RFOC')

Monthly Downloads

606

Version

3.4-14

License

GPL (>= 2)

Maintainer

Jonathan Lees

Last Published

February 7th, 2026

Functions in RFOC (3.4-14)

Create a 3D Arrow structure

Plot a BeachBall Focal Mechanism

P and T-axes data from the Harvard CMT catalog

SDR data from the Harvard CMT catalog

Hammer Projection

Equal-area point stereonet

Circle Plot with Cross Hairs

Map moment tensors

Calculate Rake angles

Vertical Rotation matrix

Distance Between Moment Tensors

Rake Calculation

Plot P-wave radiation

Plot P-T axis on CLVD

Reflect a pole through to the lower hemisphere

Plot Fault an Auxilliary Planes

Ternary Distribution of focal mechanisms

X-axis Rotation Matrix

Y-axis Rotation Matrix

Small Circle on Stereonet

Trend - Dip to XYZ

Plot CLVD focal mechanism

Plot Smooth PT-axes

Add points to Focal Mech

Translation Matrix

Plot SV-wave radiation

Z-axis Rotation Matrix

Divide a region into rectangles based on density

Convert to Cartesian

Get color of Focal Mechansim

Graphical Plot of Focal Mechanism

Flip Nodal Fault Plane

Add fancy 3D arrows

Add P-T Axis to focal plot

Vector Cross Product

Tape Base Lines

Draw circular ticmarks

convert to spherical coordinates

Get Fault Style

Plot SH-wave radiation

Plot a Focal Mechanism from SDR

Plot points on Wulff Stereonet

Convert to Spherical Coordinates

Fault style descriptor

Hudson Source Type Plot

Make a 3D arrow

Hudson Net Plot

Plot a 3D body on an existing graphic

Inverse Moment Tensor

Tape style Lune Plot

add scale on sice of image

P-wave radiation pattern

Moment Tensors from the Harvard CMT

Phong shading for a 3D body

P-wave radiation pattern

Plot radiation pattern for SH-waves

P-wave radiation pattern

Convert azimuth, dip to Cartesian Coordinates

Moment Tensor to Strike-Dip-Rake

Normal Fault Cartoon

Equal-Angle Stereonet

EqualArea Stereonet

Point on Stereonet

Print focal mechanism

Make fancy arrows

Wulff Stereonet

Test Right Hand of tensor

Cartesian Moment Tensors

fault plane projection on focal sphere

Radiation pattern for SV waves

Plot a Focal Mechanism

Plot Focal Radiation Patterns

strikeslip.fault

Strikeslip Fault Cartoon

Plot radiation pattern for P-waves

add point on focal sphere

Plot Ternary Point

Force Right-Hand System

Moment tensor to T-k

Make a 3D block Structure

Fault-Slip vector plot

Radiation pattern for P waves

Rotate Focal Mechanism

Calculates and plot Earthquake Focal Mechanisms

Rotate about the y axis

Rotate T-P axes

Plot radiation pattern for SV-waves

Thrust Fault Cartoon

Rotate about the z axis

Moment Tensor Source Type

Angle between two 2D normalized vectors

Plot Strike Dip Lines

Polt the focal mechanism polygon

95 percent confidence for Spherical Distribution

Focal Legend based on rake

Read Harvard CMT moment

Tungurahua Cartesian Moment Tensors

Radiation pattern for SH waves

Convert Cartesian to Spherical

Plot Focal Mechs at X-Y position on cross sections

Plot Non-double Couple Moment

Convert to cartesian coordinate

Plot focal mechanism

Plot one Fault plane on stereonet

Plot Many Focals

Rotate Focal Mechanism

Rotate about the x axis

convert to spherical coordinates

Cartesian Moment Tensors

Convert Strike-Dip-Rake to MEC structure

Angles for Ternary plot

Angles for focal planes

Extract Axis pole on Stereonet

Vector Cross Product

Get Points Along Great Circle