focalmech(fm, centerX, centerY, diam, varargin)

Draw a full moment tensor focal mechanism for an earthquake
Aktualisiert 10. Sep 2019

Lizenz anzeigen

Function takes 3x3 or vector of 6 independent elements of a moment tensor and plots the appropriate beachball for that earthquake
% Ryukyu Islands earthquake 4/18/2008 (from
M = [4.070 -1.830 -2.240 1.500 1.410 -1.110];
Mw = 5.0;
axis equal
% Mt. Carmel aftershock 4/18/2008
M = [ -0.754 2.250 -1.490 -0.435 -0.094 0.730 ];
Mw = 4.6;

Zitieren als

James Conder (2024). focalmech(fm, centerX, centerY, diam, varargin) (, MATLAB Central File Exchange. Abgerufen .

Kompatibilität der MATLAB-Version
Erstellt mit R2019a
Kompatibel mit allen Versionen
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Version Veröffentlicht Versionshinweise

Added option for moment tensor to be in xyz coordinate system (default still rtf).

... and another.
Just updated the comments to include page numbers and volume of the manuscript this was published in. No changes to the code itself.

Another minor tweak for efficiency.

Improved speed by vectorizing main loop. Runs 4-10x faster than previous version.

Added optional input for text above beachball. E.g.,
>> focalmech(M,5.2,0, Mw,'text','4/18/2008')

Fix a plotting issue that arose when matlab breaks a single contour into multiple pieces.

Fixed bug that sometimes reversed color pattern for events with >40% isotropic components.

Rewrote the portion to fill the beachballs that should behave for older versions as well as the current version of MatLab (Grzegorz's comment).