Plate Motion Calculator


This "Plate Motion Calculator" calculates the relative and absolute plate motion direction and speed at any point on the earth. Plate models used in this site describe "geological current" plate motions, i.e. ~2 million years averaging velocities. The prototype of web-based plate motion calculator was developed by K. Tamaki. This calculator is a revised version by K. Okino using perl-CGI script.

Method of Calculation: Select plate motion model, plate (or plates) and input latitude and longitude of the point, then press the "Execute calculation" button.

plate geometries for NUVEL models(left) and for MORVEL (right, figure from DeMets et al., 2010)

 

Plate Model: (see references below)

Moving Plate:

Fixed Plate: (not used in absolute models)

Latitude[deg]: (North: positive, South : negative (ex. -15.5))

Longitude[deg]:(East: positive, West: negative (ex. -116.5))


References of Models:

NUVEL-1:(relative motion, Pacific plate fixed)

NUVEL-1A:(relative motion, Pacific plate fixed)

NNR-NUVEL-1:(absolute plate motion, no-net rotation)

NNR-NUVEL-1A:(absolute plate motion, no-net rotation)

HS3-NUVEL-1A:(absolute plate motion, relative to hotspot frame)

Gripp, A.E., and Gordon, R.G., Young tracks of hotspots and current plate velocities, Geophys. J. Int., 150, 321-361, 2002.

 

MORVEL: (new relative motion model for 25 tectonic plates, spreading rates and fault azimuths are used to determine the motions of 19 plates, and GPS station velocites and azimuthal data for 6 smaller plates with little or no connection to the mid-ocean ridges)

DeMets, C., R. G. Gordon, and D. F. Argus, Geologically current plate motions, Geophys. J. Int., 181, 1-80, 2010.

NNR-MORVEL: (absolute plate motion, no-net rotation, for MORVEL 25 plates and Bird(2003) 's 31 plates)

Argus, D.F., Gordon, R.G> and DeMets, C. Geologically curren motion of 56 plates relative to the no-net rotation reference frame, Geochemistry, Geophysics, Geosystems , 12, doi:10.1029/2011GC00375., 2011.

Bird, P. An updated digital model of plate boundaries, Geochemisty, Geophysics, Geosystems, 4, 1027, doi:10.1029/2001GC000252, 2003.

 

 

Used Equation:


Last revised : 19 Jun, 2013, bug report to okino at aori.u-tokyo.ac.jp