CTM

We are using jupyter notebook developed by Liz Hearn to calculate CTM values at points defined for the GFM.

GFM Points

AP has created a discretized version of the GFM. Values are defines for the CVM-H GTL region. The coverage region for this version of the GFM matches the CVM-H GTL coverage region, with corner points of 30.70459 -122.541004 and 38.545964 -112.995797. The resolution of the GFM 3D voxel data set is 10km x 10km x 1km (depth). Each level of the GFM has 8256 points, and the depth goes from -100km to +4km (8256 x 105 = 866880) points.

A CSV file that defines the GFM region types for each of these points is posted here:

• GFM Points (Warning 45MB download)

The points in this file use the CVM-H convention of elevation relative to sea level in meter, with positive values above sea level, and negative values depth below sea level.

GFM Region Definitions

Corner Points from GFM file:

-122.681200, 29.709900

-123.205500, 37.335600

-112.481200, 37.412300 

-112.864200, 29.767300

Corner Points of CVM-H GTL from CVM-H Users Guide:

-122.541004,30.70459

-122.541004,38.545964

-112.995797,38.545964

-112.995797,30.70459

Heatflow Region IDs and Names

ID's for the 14 original CTM heat flow regions, from Thatcher and Chapman (2020):
1 WBR (Western Basin and Range)
2 SN (Sierra Nevada)
3 CCR (Central Coast Ranges)
4 PR (Peninsular Ranges)
5 ST (Outer Salton Trough, aka oST)
6 WTR (Western Transverse Ranges)
7 LA (Los Angeles)
8 SG (San Gabriels)
9 MD (Mojave Desert)
10 GV (Great Valley)
11 ETR (Eastern Transverse Ranges)
12 iST (Inner Salton Trough, also called STi5 in some files)
13 iCB (Inner Continental Borderland)
14 VB (Ventura Basin)

(the following were added to expand CTM region to cover the Geologic Framework region)
15 Ocean
16 CCR extension
17 GV extension
18 SN extension
19 WBR extension
20 ST extension
21 PR extension

Related Entries

• SCEC CXM Site
• UCVM